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https://github.com/psycopg/psycopg2.git
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Merge branch 'range-type' into devel
This commit is contained in:
Daniele Varrazzo
commit
4244d5953a
1
NEWS
1
NEWS
|
|
@ -2,6 +2,7 @@ What's new in psycopg 2.4.6
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|||
---------------------------
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- Added JSON adaptation.
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- Added support for PostgreSQL 9.2 range types.
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- Added support for backward scrollable cursors. Thanks to Jon Nelson
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for the initial patch (ticket #108).
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- Added a simple way to customize casting of composite types into Python
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|
|
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@ -373,6 +373,89 @@ requires no adapter registration.
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List of component type oids of the type to be casted.
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.. index::
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pair: range; Data types
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Range data types
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^^^^^^^^^^^^^^^^
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.. versionadded:: 2.4.6
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Psycopg offers a `Range` Python type and supports adaptation between them and
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PostgreSQL |range|_ types. Builtin |range| types are supported out-of-the-box;
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user-defined |range| types can be adapted using `register_range()`.
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.. |range| replace:: :sql:`range`
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.. _range: http://www.postgresql.org/docs/current/static/rangetypes.html
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.. autoclass:: Range
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This Python type is only used to pass and retrieve range values to and
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from PostgreSQL and doesn't attempt to replicate the PostgreSQL range
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features: it doesn't perform normalization and doesn't implement all the
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operators__ supported by the database.
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.. __: http://www.postgresql.org/docs/current/static/functions-range.html#RANGE-OPERATORS-TABLE
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`!Range` objects are immutable, hashable, and support the ``in`` operator
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(checking if an element is within the range). They can be tested for
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equivalence but not for ordering. Empty ranges evaluate to `!False` in
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boolean context, nonempty evaluate to `!True`.
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Although it is possible to instantiate `!Range` objects, the class doesn't
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have an adapter registered, so you cannot normally pass these instances as
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query arguments. To use range objects as query arguments you can either
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use one of the provided subclasses, such as `NumericRange` or create a
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custom subclass using `register_range()`.
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Object attributes:
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.. autoattribute:: isempty
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.. autoattribute:: lower
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.. autoattribute:: upper
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.. autoattribute:: lower_inc
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.. autoattribute:: upper_inc
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.. autoattribute:: lower_inf
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.. autoattribute:: upper_inf
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The following `Range` subclasses map builtin PostgreSQL |range| types to
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Python objects: they have an adapter registered so their instances can be
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passed as query arguments. |range| values read from database queries are
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automatically casted into instances of these classes.
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.. autoclass:: NumericRange
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.. autoclass:: DateRange
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.. autoclass:: DateTimeRange
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.. autoclass:: DateTimeTZRange
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Custom |range| types (created with |CREATE TYPE|_ :sql:`... AS RANGE`) can be
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adapted to a custom `Range` subclass:
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.. autofunction:: register_range
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.. autoclass:: RangeCaster
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Object attributes:
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.. attribute:: range
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The `!Range` subclass adapted.
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.. attribute:: adapter
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The `~psycopg2.extensions.ISQLQuote` responsible to adapt `!range`.
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.. attribute:: typecaster
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The object responsible for casting.
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.. attribute:: array_typecaster
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The object responsible to cast arrays, if available, else `!None`.
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.. index::
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pair: UUID; Data types
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|
|
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468
lib/_range.py
Normal file
468
lib/_range.py
Normal file
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|
@ -0,0 +1,468 @@
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"""Implementation of the Range type and adaptation
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"""
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# psycopg/_range.py - Implementation of the Range type and adaptation
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#
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# Copyright (C) 2012 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published
|
||||
# by the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
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||||
# In addition, as a special exception, the copyright holders give
|
||||
# permission to link this program with the OpenSSL library (or with
|
||||
# modified versions of OpenSSL that use the same license as OpenSSL),
|
||||
# and distribute linked combinations including the two.
|
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#
|
||||
# You must obey the GNU Lesser General Public License in all respects for
|
||||
# all of the code used other than OpenSSL.
|
||||
#
|
||||
# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
|
||||
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
||||
# License for more details.
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import re
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from psycopg2._psycopg import ProgrammingError, InterfaceError
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from psycopg2.extensions import ISQLQuote, adapt, register_adapter
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from psycopg2.extensions import new_type, new_array_type, register_type
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class Range(object):
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"""Python representation for a PostgreSQL |range|_ type.
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:param lower: lower bound for the range. `!None` means unbound
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:param upper: upper bound for the range. `!None` means unbound
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:param bounds: one of the literal strings ``()``, ``[)``, ``(]``, ``[]``,
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representing whether the lower or upper bounds are included
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:param empty: if `!True`, the range is empty
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"""
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__slots__ = ('_lower', '_upper', '_bounds')
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def __init__(self, lower=None, upper=None, bounds='[)', empty=False):
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if not empty:
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if bounds not in ('[)', '(]', '()', '[]'):
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raise ValueError("bound flags not valid: %r" % bounds)
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self._lower = lower
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self._upper = upper
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self._bounds = bounds
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else:
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self._lower = self._upper = self._bounds = None
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def __repr__(self):
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if self._bounds is None:
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return "%s(empty=True)" % self.__class__.__name__
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else:
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return "%s(%r, %r, %r)" % (self.__class__.__name__,
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self._lower, self._upper, self._bounds)
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@property
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def lower(self):
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"""The lower bound of the range. `!None` if empty or unbound."""
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return self._lower
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@property
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def upper(self):
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"""The upper bound of the range. `!None` if empty or unbound."""
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return self._upper
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@property
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def isempty(self):
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"""`!True` if the range is empty."""
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return self._bounds is None
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@property
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def lower_inf(self):
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"""`!True` if the range doesn't have a lower bound."""
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if self._bounds is None: return False
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return self._lower is None
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@property
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def upper_inf(self):
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"""`!True` if the range doesn't have an upper bound."""
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if self._bounds is None: return False
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return self._upper is None
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@property
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def lower_inc(self):
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"""`!True` if the lower bound is included in the range."""
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||||
if self._bounds is None: return False
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if self._lower is None: return False
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return self._bounds[0] == '['
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@property
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def upper_inc(self):
|
||||
"""`!True` if the upper bound is included in the range."""
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||||
if self._bounds is None: return False
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if self._upper is None: return False
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return self._bounds[1] == ']'
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|
||||
def __contains__(self, x):
|
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if self._bounds is None: return False
|
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if self._lower is not None:
|
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if self._bounds[0] == '[':
|
||||
if x < self._lower: return False
|
||||
else:
|
||||
if x <= self._lower: return False
|
||||
|
||||
if self._upper is not None:
|
||||
if self._bounds[1] == ']':
|
||||
if x > self._upper: return False
|
||||
else:
|
||||
if x >= self._upper: return False
|
||||
|
||||
return True
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|
||||
def __nonzero__(self):
|
||||
return self._bounds is not None
|
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|
||||
def __eq__(self, other):
|
||||
return (self._lower == other._lower
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and self._upper == other._upper
|
||||
and self._bounds == other._bounds)
|
||||
|
||||
def __ne__(self, other):
|
||||
return not self.__eq__(other)
|
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|
||||
def __hash__(self):
|
||||
return hash((self._lower, self._upper, self._bounds))
|
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|
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def __lt__(self, other):
|
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raise TypeError(
|
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'Range objects cannot be ordered; please refer to the PostgreSQL'
|
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' documentation to perform this operation in the database')
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|
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__le__ = __gt__ = __ge__ = __lt__
|
||||
|
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|
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def register_range(pgrange, pyrange, conn_or_curs, globally=False):
|
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"""Create and register an adapter and the typecasters to convert between
|
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a PostgreSQL |range|_ type and a PostgreSQL `Range` subclass.
|
||||
|
||||
:param pgrange: the name of the PostgreSQL |range| type. Can be
|
||||
schema-qualified
|
||||
:param pyrange: a `Range` strict subclass, or just a name to give to a new
|
||||
class
|
||||
:param conn_or_curs: a connection or cursor used to find the oid of the
|
||||
range and its subtype; the typecaster is registered in a scope limited
|
||||
to this object, unless *globally* is set to `!True`
|
||||
:param globally: if `!False` (default) register the typecaster only on
|
||||
*conn_or_curs*, otherwise register it globally
|
||||
:return: `RangeCaster` instance responsible for the conversion
|
||||
|
||||
If a string is passed to *pyrange*, a new `Range` subclass is created
|
||||
with such name and will be available as the `~RangeCaster.range` attribute
|
||||
of the returned `RangeCaster` object.
|
||||
|
||||
The function queries the database on *conn_or_curs* to inspect the
|
||||
*pgrange* type. Raise `~psycopg2.ProgrammingError` if the type is not
|
||||
found. If querying the database is not advisable, use directly the
|
||||
`RangeCaster` class and register the adapter and typecasters using the
|
||||
provided functions.
|
||||
|
||||
"""
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caster = RangeCaster._from_db(pgrange, pyrange, conn_or_curs)
|
||||
caster._register(not globally and conn_or_curs or None)
|
||||
return caster
|
||||
|
||||
|
||||
class RangeAdapter(object):
|
||||
"""`ISQLQuote` adapter for `Range` subclasses.
|
||||
|
||||
This is an abstract class: concrete classes must set a `name` class
|
||||
attribute or override `getquoted()`.
|
||||
"""
|
||||
name = None
|
||||
|
||||
def __init__(self, adapted):
|
||||
self.adapted = adapted
|
||||
|
||||
def __conform__(self, proto):
|
||||
if self._proto is ISQLQuote:
|
||||
return self
|
||||
|
||||
def prepare(self, conn):
|
||||
self._conn = conn
|
||||
|
||||
def getquoted(self):
|
||||
if self.name is None:
|
||||
raise NotImplementedError(
|
||||
'RangeAdapter must be subclassed overriding its name '
|
||||
'or the getquoted() method')
|
||||
|
||||
r = self.adapted
|
||||
if r.isempty:
|
||||
return "'empty'::%s" % self.name
|
||||
|
||||
if r.lower is not None:
|
||||
a = adapt(r.lower)
|
||||
if hasattr(a, 'prepare'):
|
||||
a.prepare(self._conn)
|
||||
lower = a.getquoted()
|
||||
else:
|
||||
lower = 'NULL'
|
||||
|
||||
if r.upper is not None:
|
||||
a = adapt(r.upper)
|
||||
if hasattr(a, 'prepare'):
|
||||
a.prepare(self._conn)
|
||||
upper = a.getquoted()
|
||||
else:
|
||||
upper = 'NULL'
|
||||
|
||||
return "%s(%s, %s, '%s')" % (
|
||||
self.name, lower, upper, r._bounds)
|
||||
|
||||
|
||||
class RangeCaster(object):
|
||||
"""Helper class to convert between `Range` and PostgreSQL range types.
|
||||
|
||||
Objects of this class are usually created by `register_range()`. Manual
|
||||
creation could be useful if querying the database is not advisable: in
|
||||
this case the oids must be provided.
|
||||
"""
|
||||
def __init__(self, pgrange, pyrange, oid, subtype_oid, array_oid=None):
|
||||
self.subtype_oid = subtype_oid
|
||||
self._create_ranges(pgrange, pyrange)
|
||||
|
||||
name = self.adapter.name or self.adapter.__class__.__name__
|
||||
|
||||
self.typecaster = new_type((oid,), name, self.parse)
|
||||
|
||||
if array_oid is not None:
|
||||
self.array_typecaster = new_array_type(
|
||||
(array_oid,), name + "ARRAY", self.typecaster)
|
||||
else:
|
||||
self.array_typecaster = None
|
||||
|
||||
def _create_ranges(self, pgrange, pyrange):
|
||||
"""Create Range and RangeAdapter classes if needed."""
|
||||
# if got a string create a new RangeAdapter concrete type (with a name)
|
||||
# else take it as an adapter. Passing an adapter should be considered
|
||||
# an implementation detail and is not documented. It is currently used
|
||||
# for the numeric ranges.
|
||||
self.adapter = None
|
||||
if isinstance(pgrange, basestring):
|
||||
self.adapter = type(pgrange, (RangeAdapter,), {})
|
||||
self.adapter.name = pgrange
|
||||
else:
|
||||
try:
|
||||
if issubclass(pgrange, RangeAdapter) and pgrange is not RangeAdapter:
|
||||
self.adapter = pgrange
|
||||
except TypeError:
|
||||
pass
|
||||
|
||||
if self.adapter is None:
|
||||
raise TypeError(
|
||||
'pgrange must be a string or a RangeAdapter strict subclass')
|
||||
|
||||
self.range = None
|
||||
try:
|
||||
if isinstance(pyrange, basestring):
|
||||
self.range = type(pyrange, (Range,), {})
|
||||
if issubclass(pyrange, Range) and pyrange is not Range:
|
||||
self.range = pyrange
|
||||
except TypeError:
|
||||
pass
|
||||
|
||||
if self.range is None:
|
||||
raise TypeError(
|
||||
'pyrange must be a type or a Range strict subclass')
|
||||
|
||||
@classmethod
|
||||
def _from_db(self, name, pyrange, conn_or_curs):
|
||||
"""Return a `RangeCaster` instance for the type *pgrange*.
|
||||
|
||||
Raise `ProgrammingError` if the type is not found.
|
||||
"""
|
||||
from psycopg2.extensions import STATUS_IN_TRANSACTION
|
||||
from psycopg2.extras import _solve_conn_curs
|
||||
conn, curs = _solve_conn_curs(conn_or_curs)
|
||||
|
||||
if conn.server_version < 90200:
|
||||
raise ProgrammingError("range types not available in version %s"
|
||||
% conn.server_version)
|
||||
|
||||
# Store the transaction status of the connection to revert it after use
|
||||
conn_status = conn.status
|
||||
|
||||
# Use the correct schema
|
||||
if '.' in name:
|
||||
schema, tname = name.split('.', 1)
|
||||
else:
|
||||
tname = name
|
||||
schema = 'public'
|
||||
|
||||
# get the type oid and attributes
|
||||
try:
|
||||
curs.execute("""\
|
||||
select rngtypid, rngsubtype,
|
||||
(select typarray from pg_type where oid = rngtypid)
|
||||
from pg_range r
|
||||
join pg_type t on t.oid = rngtypid
|
||||
join pg_namespace ns on ns.oid = typnamespace
|
||||
where typname = %s and ns.nspname = %s;
|
||||
""", (tname, schema))
|
||||
|
||||
except ProgrammingError:
|
||||
if not conn.autocommit:
|
||||
conn.rollback()
|
||||
raise
|
||||
else:
|
||||
rec = curs.fetchone()
|
||||
|
||||
# revert the status of the connection as before the command
|
||||
if (conn_status != STATUS_IN_TRANSACTION
|
||||
and not conn.autocommit):
|
||||
conn.rollback()
|
||||
|
||||
if not rec:
|
||||
raise ProgrammingError(
|
||||
"PostgreSQL type '%s' not found" % name)
|
||||
|
||||
type, subtype, array = rec
|
||||
|
||||
return RangeCaster(name, pyrange,
|
||||
oid=type, subtype_oid=subtype, array_oid=array)
|
||||
|
||||
_re_range = re.compile(r"""
|
||||
( \(|\[ ) # lower bound flag
|
||||
(?: # lower bound:
|
||||
" ( (?: [^"] | "")* ) " # - a quoted string
|
||||
| ( [^",]+ ) # - or an unquoted string
|
||||
)? # - or empty (not catched)
|
||||
,
|
||||
(?: # upper bound:
|
||||
" ( (?: [^"] | "")* ) " # - a quoted string
|
||||
| ( [^"\)\]]+ ) # - or an unquoted string
|
||||
)? # - or empty (not catched)
|
||||
( \)|\] ) # upper bound flag
|
||||
""", re.VERBOSE)
|
||||
|
||||
_re_undouble = re.compile(r'(["\\])\1')
|
||||
|
||||
def parse(self, s, cur=None):
|
||||
if s is None:
|
||||
return None
|
||||
|
||||
if s == 'empty':
|
||||
return self.range(empty=True)
|
||||
|
||||
m = self._re_range.match(s)
|
||||
if m is None:
|
||||
raise InterfaceError("failed to parse range: %s")
|
||||
|
||||
lower = m.group(3)
|
||||
if lower is None:
|
||||
lower = m.group(2)
|
||||
if lower is not None:
|
||||
lower = self._re_undouble.sub(r"\1", lower)
|
||||
|
||||
upper = m.group(5)
|
||||
if upper is None:
|
||||
upper = m.group(4)
|
||||
if upper is not None:
|
||||
upper = self._re_undouble.sub(r"\1", upper)
|
||||
|
||||
if cur is not None:
|
||||
lower = cur.cast(self.subtype_oid, lower)
|
||||
upper = cur.cast(self.subtype_oid, upper)
|
||||
|
||||
bounds = m.group(1) + m.group(6)
|
||||
|
||||
return self.range(lower, upper, bounds)
|
||||
|
||||
def _register(self, scope=None):
|
||||
register_type(self.typecaster, scope)
|
||||
if self.array_typecaster is not None:
|
||||
register_type(self.array_typecaster, scope)
|
||||
|
||||
register_adapter(self.range, self.adapter)
|
||||
|
||||
|
||||
class NumericRange(Range):
|
||||
"""A `Range` suitable to pass Python numeric types to a PostgreSQL range.
|
||||
|
||||
PostgreSQL types :sql:`int4range`, :sql:`int8range`, :sql:`numrange` are
|
||||
casted into `!NumericRange` instances.
|
||||
"""
|
||||
pass
|
||||
|
||||
class DateRange(Range):
|
||||
"""Represents :sql:`daterange` values."""
|
||||
pass
|
||||
|
||||
class DateTimeRange(Range):
|
||||
"""Represents :sql:`tsrange` values."""
|
||||
pass
|
||||
|
||||
class DateTimeTZRange(Range):
|
||||
"""Represents :sql:`tstzrange` values."""
|
||||
pass
|
||||
|
||||
|
||||
# Special adaptation for NumericRange. Allows to pass number range regardless
|
||||
# of whether they are ints, floats and what size of ints are, which are
|
||||
# pointless in Python world. On the way back, no numeric range is casted to
|
||||
# NumericRange, but only to their subclasses
|
||||
|
||||
class NumberRangeAdapter(RangeAdapter):
|
||||
"""Adapt a range if the subtype doesn't need quotes."""
|
||||
def getquoted(self):
|
||||
r = self.adapted
|
||||
if r.isempty:
|
||||
return "'empty'"
|
||||
|
||||
if not r.lower_inf:
|
||||
# not exactly: we are relying that none of these object is really
|
||||
# quoted (they are numbers). Also, I'm lazy and not preparing the
|
||||
# adapter because I assume encoding doesn't matter for these
|
||||
# objects.
|
||||
lower = adapt(r.lower).getquoted()
|
||||
else:
|
||||
lower = ''
|
||||
|
||||
if not r.upper_inf:
|
||||
upper = adapt(r.upper).getquoted()
|
||||
else:
|
||||
upper = ''
|
||||
|
||||
return "'%s%s,%s%s'" % (
|
||||
r._bounds[0], lower, upper, r._bounds[1])
|
||||
|
||||
# TODO: probably won't work with infs, nans and other tricky cases.
|
||||
register_adapter(NumericRange, NumberRangeAdapter)
|
||||
|
||||
|
||||
# Register globally typecasters and adapters for builtin range types.
|
||||
|
||||
# note: the adapter is registered more than once, but this is harmless.
|
||||
int4range_caster = RangeCaster(NumberRangeAdapter, NumericRange,
|
||||
oid=3904, subtype_oid=23, array_oid=3905)
|
||||
int4range_caster._register()
|
||||
|
||||
int8range_caster = RangeCaster(NumberRangeAdapter, NumericRange,
|
||||
oid=3926, subtype_oid=20, array_oid=3927)
|
||||
int8range_caster._register()
|
||||
|
||||
numrange_caster = RangeCaster(NumberRangeAdapter, NumericRange,
|
||||
oid=3906, subtype_oid=1700, array_oid=3907)
|
||||
numrange_caster._register()
|
||||
|
||||
daterange_caster = RangeCaster('daterange', DateRange,
|
||||
oid=3912, subtype_oid=1082, array_oid=3913)
|
||||
daterange_caster._register()
|
||||
|
||||
tsrange_caster = RangeCaster('tsrange', DateTimeRange,
|
||||
oid=3908, subtype_oid=1114, array_oid=3909)
|
||||
tsrange_caster._register()
|
||||
|
||||
tstzrange_caster = RangeCaster('tstzrange', DateTimeTZRange,
|
||||
oid=3910, subtype_oid=1184, array_oid=3911)
|
||||
tstzrange_caster._register()
|
||||
|
||||
|
||||
|
|
@ -952,5 +952,12 @@ def register_composite(name, conn_or_curs, globally=False, factory=None):
|
|||
# expose the json adaptation stuff into the module
|
||||
from psycopg2._json import json, Json, register_json, register_default_json
|
||||
|
||||
|
||||
# Expose range-related objects
|
||||
from psycopg2._range import Range, NumericRange
|
||||
from psycopg2._range import DateRange, DateTimeRange, DateTimeTZRange
|
||||
from psycopg2._range import register_range, RangeAdapter, RangeCaster
|
||||
|
||||
|
||||
__all__ = filter(lambda k: not k.startswith('_'), locals().keys())
|
||||
|
||||
|
|
|
|||
|
|
@ -17,9 +17,10 @@
|
|||
import re
|
||||
import sys
|
||||
from decimal import Decimal
|
||||
from datetime import date
|
||||
from datetime import date, datetime
|
||||
|
||||
from testutils import unittest, skip_if_no_uuid, skip_before_postgres
|
||||
from testutils import decorate_all_tests
|
||||
|
||||
import psycopg2
|
||||
import psycopg2.extras
|
||||
|
|
@ -1055,6 +1056,496 @@ class JsonTestCase(unittest.TestCase):
|
|||
self.assertEqual(data['b'], None)
|
||||
|
||||
|
||||
class RangeTestCase(unittest.TestCase):
|
||||
def test_noparam(self):
|
||||
from psycopg2.extras import Range
|
||||
r = Range()
|
||||
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, None)
|
||||
self.assertEqual(r.upper, None)
|
||||
self.assert_(r.lower_inf)
|
||||
self.assert_(r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_empty(self):
|
||||
from psycopg2.extras import Range
|
||||
r = Range(empty=True)
|
||||
|
||||
self.assert_(r.isempty)
|
||||
self.assertEqual(r.lower, None)
|
||||
self.assertEqual(r.upper, None)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_nobounds(self):
|
||||
from psycopg2.extras import Range
|
||||
r = Range(10, 20)
|
||||
self.assertEqual(r.lower, 10)
|
||||
self.assertEqual(r.upper, 20)
|
||||
self.assert_(not r.isempty)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_bounds(self):
|
||||
from psycopg2.extras import Range
|
||||
for bounds, lower_inc, upper_inc in [
|
||||
('[)', True, False),
|
||||
('(]', False, True),
|
||||
('()', False, False),
|
||||
('[]', True, True),]:
|
||||
r = Range(10, 20, bounds)
|
||||
self.assertEqual(r.lower, 10)
|
||||
self.assertEqual(r.upper, 20)
|
||||
self.assert_(not r.isempty)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assertEqual(r.lower_inc, lower_inc)
|
||||
self.assertEqual(r.upper_inc, upper_inc)
|
||||
|
||||
def test_keywords(self):
|
||||
from psycopg2.extras import Range
|
||||
r = Range(upper=20)
|
||||
self.assertEqual(r.lower, None)
|
||||
self.assertEqual(r.upper, 20)
|
||||
self.assert_(not r.isempty)
|
||||
self.assert_(r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
r = Range(lower=10, bounds='(]')
|
||||
self.assertEqual(r.lower, 10)
|
||||
self.assertEqual(r.upper, None)
|
||||
self.assert_(not r.isempty)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_bad_bounds(self):
|
||||
from psycopg2.extras import Range
|
||||
self.assertRaises(ValueError, Range, bounds='(')
|
||||
self.assertRaises(ValueError, Range, bounds='[}')
|
||||
|
||||
def test_in(self):
|
||||
from psycopg2.extras import Range
|
||||
r = Range(empty=True)
|
||||
self.assert_(10 not in r)
|
||||
|
||||
r = Range()
|
||||
self.assert_(10 in r)
|
||||
|
||||
r = Range(lower=10, bounds='[)')
|
||||
self.assert_(9 not in r)
|
||||
self.assert_(10 in r)
|
||||
self.assert_(11 in r)
|
||||
|
||||
r = Range(lower=10, bounds='()')
|
||||
self.assert_(9 not in r)
|
||||
self.assert_(10 not in r)
|
||||
self.assert_(11 in r)
|
||||
|
||||
r = Range(upper=20, bounds='()')
|
||||
self.assert_(19 in r)
|
||||
self.assert_(20 not in r)
|
||||
self.assert_(21 not in r)
|
||||
|
||||
r = Range(upper=20, bounds='(]')
|
||||
self.assert_(19 in r)
|
||||
self.assert_(20 in r)
|
||||
self.assert_(21 not in r)
|
||||
|
||||
r = Range(10, 20)
|
||||
self.assert_(9 not in r)
|
||||
self.assert_(10 in r)
|
||||
self.assert_(11 in r)
|
||||
self.assert_(19 in r)
|
||||
self.assert_(20 not in r)
|
||||
self.assert_(21 not in r)
|
||||
|
||||
r = Range(10, 20, '(]')
|
||||
self.assert_(9 not in r)
|
||||
self.assert_(10 not in r)
|
||||
self.assert_(11 in r)
|
||||
self.assert_(19 in r)
|
||||
self.assert_(20 in r)
|
||||
self.assert_(21 not in r)
|
||||
|
||||
r = Range(20, 10)
|
||||
self.assert_(9 not in r)
|
||||
self.assert_(10 not in r)
|
||||
self.assert_(11 not in r)
|
||||
self.assert_(19 not in r)
|
||||
self.assert_(20 not in r)
|
||||
self.assert_(21 not in r)
|
||||
|
||||
def test_nonzero(self):
|
||||
from psycopg2.extras import Range
|
||||
self.assert_(Range())
|
||||
self.assert_(Range(10, 20))
|
||||
self.assert_(not Range(empty=True))
|
||||
|
||||
def test_eq_hash(self):
|
||||
from psycopg2.extras import Range
|
||||
def assert_equal(r1, r2):
|
||||
self.assert_(r1 == r2)
|
||||
self.assert_(hash(r1) == hash(r2))
|
||||
|
||||
assert_equal(Range(empty=True), Range(empty=True))
|
||||
assert_equal(Range(), Range())
|
||||
assert_equal(Range(10, None), Range(10, None))
|
||||
assert_equal(Range(10, 20), Range(10, 20))
|
||||
assert_equal(Range(10, 20), Range(10, 20, '[)'))
|
||||
assert_equal(Range(10, 20, '[]'), Range(10, 20, '[]'))
|
||||
|
||||
def assert_not_equal(r1, r2):
|
||||
self.assert_(r1 != r2)
|
||||
self.assert_(hash(r1) != hash(r2))
|
||||
|
||||
assert_not_equal(Range(10, 20), Range(10, 21))
|
||||
assert_not_equal(Range(10, 20), Range(11, 20))
|
||||
assert_not_equal(Range(10, 20, '[)'), Range(10, 20, '[]'))
|
||||
|
||||
def test_not_ordered(self):
|
||||
from psycopg2.extras import Range
|
||||
self.assertRaises(TypeError, lambda: Range(empty=True) < Range(0,4))
|
||||
self.assertRaises(TypeError, lambda: Range(1,2) > Range(0,4))
|
||||
self.assertRaises(TypeError, lambda: Range(1,2) <= Range())
|
||||
self.assertRaises(TypeError, lambda: Range(1,2) >= Range())
|
||||
|
||||
|
||||
def skip_if_no_range(f):
|
||||
def skip_if_no_range_(self):
|
||||
if self.conn.server_version < 90200:
|
||||
return self.skipTest(
|
||||
"server version %s doesn't support range types"
|
||||
% self.conn.server_version)
|
||||
|
||||
return f(self)
|
||||
|
||||
skip_if_no_range_.__name__ = f.__name__
|
||||
return skip_if_no_range_
|
||||
|
||||
|
||||
class RangeCasterTestCase(unittest.TestCase):
|
||||
def setUp(self):
|
||||
self.conn = psycopg2.connect(dsn)
|
||||
|
||||
def tearDown(self):
|
||||
self.conn.close()
|
||||
|
||||
builtin_ranges = ('int4range', 'int8range', 'numrange',
|
||||
'daterange', 'tsrange', 'tstzrange')
|
||||
|
||||
def test_cast_null(self):
|
||||
cur = self.conn.cursor()
|
||||
for type in self.builtin_ranges:
|
||||
cur.execute("select NULL::%s" % type)
|
||||
r = cur.fetchone()[0]
|
||||
self.assertEqual(r, None)
|
||||
|
||||
def test_cast_empty(self):
|
||||
from psycopg2.extras import Range
|
||||
cur = self.conn.cursor()
|
||||
for type in self.builtin_ranges:
|
||||
cur.execute("select 'empty'::%s" % type)
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, Range), type)
|
||||
self.assert_(r.isempty)
|
||||
|
||||
def test_cast_inf(self):
|
||||
from psycopg2.extras import Range
|
||||
cur = self.conn.cursor()
|
||||
for type in self.builtin_ranges:
|
||||
cur.execute("select '(,)'::%s" % type)
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, Range), type)
|
||||
self.assert_(not r.isempty)
|
||||
self.assert_(r.lower_inf)
|
||||
self.assert_(r.upper_inf)
|
||||
|
||||
def test_cast_numbers(self):
|
||||
from psycopg2.extras import NumericRange
|
||||
cur = self.conn.cursor()
|
||||
for type in ('int4range', 'int8range'):
|
||||
cur.execute("select '(10,20)'::%s" % type)
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, NumericRange))
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, 11)
|
||||
self.assertEqual(r.upper, 20)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
cur.execute("select '(10.2,20.6)'::numrange")
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, NumericRange))
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, Decimal('10.2'))
|
||||
self.assertEqual(r.upper, Decimal('20.6'))
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_cast_date(self):
|
||||
from psycopg2.extras import DateRange
|
||||
cur = self.conn.cursor()
|
||||
cur.execute("select '(2000-01-01,2012-12-31)'::daterange")
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, DateRange))
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, date(2000,1,2))
|
||||
self.assertEqual(r.upper, date(2012,12,31))
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_cast_timestamp(self):
|
||||
from psycopg2.extras import DateTimeRange
|
||||
cur = self.conn.cursor()
|
||||
ts1 = datetime(2000,1,1)
|
||||
ts2 = datetime(2000,12,31,23,59,59,999)
|
||||
cur.execute("select tsrange(%s, %s, '()')", (ts1, ts2))
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, DateTimeRange))
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, ts1)
|
||||
self.assertEqual(r.upper, ts2)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(not r.lower_inc)
|
||||
self.assert_(not r.upper_inc)
|
||||
|
||||
def test_cast_timestamptz(self):
|
||||
from psycopg2.extras import DateTimeTZRange
|
||||
from psycopg2.tz import FixedOffsetTimezone
|
||||
cur = self.conn.cursor()
|
||||
ts1 = datetime(2000,1,1, tzinfo=FixedOffsetTimezone(600))
|
||||
ts2 = datetime(2000,12,31,23,59,59,999, tzinfo=FixedOffsetTimezone(600))
|
||||
cur.execute("select tstzrange(%s, %s, '[]')", (ts1, ts2))
|
||||
r = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r, DateTimeTZRange))
|
||||
self.assert_(not r.isempty)
|
||||
self.assertEqual(r.lower, ts1)
|
||||
self.assertEqual(r.upper, ts2)
|
||||
self.assert_(not r.lower_inf)
|
||||
self.assert_(not r.upper_inf)
|
||||
self.assert_(r.lower_inc)
|
||||
self.assert_(r.upper_inc)
|
||||
|
||||
def test_adapt_number_range(self):
|
||||
from psycopg2.extras import NumericRange
|
||||
cur = self.conn.cursor()
|
||||
|
||||
r = NumericRange(empty=True)
|
||||
cur.execute("select %s::int4range", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange))
|
||||
self.assert_(r1.isempty)
|
||||
|
||||
r = NumericRange(10, 20)
|
||||
cur.execute("select %s::int8range", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange))
|
||||
self.assertEqual(r1.lower, 10)
|
||||
self.assertEqual(r1.upper, 20)
|
||||
self.assert_(r1.lower_inc)
|
||||
self.assert_(not r1.upper_inc)
|
||||
|
||||
r = NumericRange(10.2, 20.5, '(]')
|
||||
cur.execute("select %s::numrange", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange))
|
||||
self.assertEqual(r1.lower, Decimal('10.2'))
|
||||
self.assertEqual(r1.upper, Decimal('20.5'))
|
||||
self.assert_(not r1.lower_inc)
|
||||
self.assert_(r1.upper_inc)
|
||||
|
||||
def test_adapt_numeric_range(self):
|
||||
from psycopg2.extras import NumericRange
|
||||
cur = self.conn.cursor()
|
||||
|
||||
r = NumericRange(empty=True)
|
||||
cur.execute("select %s::int4range", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange), r1)
|
||||
self.assert_(r1.isempty)
|
||||
|
||||
r = NumericRange(10, 20)
|
||||
cur.execute("select %s::int8range", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange))
|
||||
self.assertEqual(r1.lower, 10)
|
||||
self.assertEqual(r1.upper, 20)
|
||||
self.assert_(r1.lower_inc)
|
||||
self.assert_(not r1.upper_inc)
|
||||
|
||||
r = NumericRange(10.2, 20.5, '(]')
|
||||
cur.execute("select %s::numrange", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, NumericRange))
|
||||
self.assertEqual(r1.lower, Decimal('10.2'))
|
||||
self.assertEqual(r1.upper, Decimal('20.5'))
|
||||
self.assert_(not r1.lower_inc)
|
||||
self.assert_(r1.upper_inc)
|
||||
|
||||
def test_adapt_date_range(self):
|
||||
from psycopg2.extras import DateRange, DateTimeRange, DateTimeTZRange
|
||||
from psycopg2.tz import FixedOffsetTimezone
|
||||
cur = self.conn.cursor()
|
||||
|
||||
d1 = date(2012, 01, 01)
|
||||
d2 = date(2012, 12, 31)
|
||||
r = DateRange(d1, d2)
|
||||
cur.execute("select %s", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, DateRange))
|
||||
self.assertEqual(r1.lower, d1)
|
||||
self.assertEqual(r1.upper, d2)
|
||||
self.assert_(r1.lower_inc)
|
||||
self.assert_(not r1.upper_inc)
|
||||
|
||||
r = DateTimeRange(empty=True)
|
||||
cur.execute("select %s", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, DateTimeRange))
|
||||
self.assert_(r1.isempty)
|
||||
|
||||
ts1 = datetime(2000,1,1, tzinfo=FixedOffsetTimezone(600))
|
||||
ts2 = datetime(2000,12,31,23,59,59,999, tzinfo=FixedOffsetTimezone(600))
|
||||
r = DateTimeTZRange(ts1, ts2, '(]')
|
||||
cur.execute("select %s", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assert_(isinstance(r1, DateTimeTZRange))
|
||||
self.assertEqual(r1.lower, ts1)
|
||||
self.assertEqual(r1.upper, ts2)
|
||||
self.assert_(not r1.lower_inc)
|
||||
self.assert_(r1.upper_inc)
|
||||
|
||||
def test_register_range_adapter(self):
|
||||
from psycopg2.extras import Range, register_range
|
||||
cur = self.conn.cursor()
|
||||
cur.execute("create type textrange as range (subtype=text)")
|
||||
rc = register_range('textrange', 'TextRange', cur)
|
||||
|
||||
TextRange = rc.range
|
||||
self.assert_(issubclass(TextRange, Range))
|
||||
self.assertEqual(TextRange.__name__, 'TextRange')
|
||||
|
||||
r = TextRange('a', 'b', '(]')
|
||||
cur.execute("select %s", (r,))
|
||||
r1 = cur.fetchone()[0]
|
||||
self.assertEqual(r1.lower, 'a')
|
||||
self.assertEqual(r1.upper, 'b')
|
||||
self.assert_(not r1.lower_inc)
|
||||
self.assert_(r1.upper_inc)
|
||||
|
||||
cur.execute("select %s", ([r,r,r],))
|
||||
rs = cur.fetchone()[0]
|
||||
self.assertEqual(len(rs), 3)
|
||||
for r1 in rs:
|
||||
self.assertEqual(r1.lower, 'a')
|
||||
self.assertEqual(r1.upper, 'b')
|
||||
self.assert_(not r1.lower_inc)
|
||||
self.assert_(r1.upper_inc)
|
||||
|
||||
def test_range_escaping(self):
|
||||
from psycopg2.extras import register_range
|
||||
cur = self.conn.cursor()
|
||||
cur.execute("create type textrange as range (subtype=text)")
|
||||
rc = register_range('textrange', 'TextRange', cur)
|
||||
|
||||
TextRange = rc.range
|
||||
cur.execute("""
|
||||
create table rangetest (
|
||||
id integer primary key,
|
||||
range textrange)""")
|
||||
|
||||
bounds = [ '[)', '(]', '()', '[]' ]
|
||||
ranges = [ TextRange(low, up, bounds[i % 4])
|
||||
for i, (low, up) in enumerate(zip(
|
||||
[None] + map(chr, range(1, 128)),
|
||||
map(chr, range(1,128)) + [None],
|
||||
))]
|
||||
ranges.append(TextRange())
|
||||
ranges.append(TextRange(empty=True))
|
||||
|
||||
errs = 0
|
||||
for i, r in enumerate(ranges):
|
||||
# not all the ranges make sense:
|
||||
# fun fact: select ascii('#') < ascii('$'), '#' < '$'
|
||||
# yelds... t, f! At least in en_GB.UTF-8 collation.
|
||||
# which seems suggesting a supremacy of the pound on the dollar.
|
||||
# So some of these ranges will fail to insert. Be prepared but...
|
||||
try:
|
||||
cur.execute("""
|
||||
savepoint x;
|
||||
insert into rangetest (id, range) values (%s, %s);
|
||||
""", (i, r))
|
||||
except psycopg2.DataError:
|
||||
errs += 1
|
||||
cur.execute("rollback to savepoint x;")
|
||||
|
||||
# ...not too many errors! in the above collate there are 17 errors:
|
||||
# assume in other collates we won't find more than 30
|
||||
self.assert_(errs < 30,
|
||||
"too many collate errors. Is the test working?")
|
||||
|
||||
cur.execute("select id, range from rangetest order by id")
|
||||
for i, r in cur:
|
||||
self.assertEqual(ranges[i].lower, r.lower)
|
||||
self.assertEqual(ranges[i].upper, r.upper)
|
||||
self.assertEqual(ranges[i].lower_inc, r.lower_inc)
|
||||
self.assertEqual(ranges[i].upper_inc, r.upper_inc)
|
||||
self.assertEqual(ranges[i].lower_inf, r.lower_inf)
|
||||
self.assertEqual(ranges[i].upper_inf, r.upper_inf)
|
||||
|
||||
def test_range_not_found(self):
|
||||
from psycopg2.extras import register_range
|
||||
cur = self.conn.cursor()
|
||||
self.assertRaises(psycopg2.ProgrammingError,
|
||||
register_range, 'nosuchrange', 'FailRange', cur)
|
||||
|
||||
def test_schema_range(self):
|
||||
cur = self.conn.cursor()
|
||||
cur.execute("create schema rs")
|
||||
cur.execute("create type r1 as range (subtype=text)")
|
||||
cur.execute("create type r2 as range (subtype=text)")
|
||||
cur.execute("create type rs.r2 as range (subtype=text)")
|
||||
cur.execute("create type rs.r3 as range (subtype=text)")
|
||||
cur.execute("savepoint x")
|
||||
|
||||
from psycopg2.extras import register_range
|
||||
ra1 = register_range('r1', 'r1', cur)
|
||||
ra2 = register_range('r2', 'r2', cur)
|
||||
rars2 = register_range('rs.r2', 'r2', cur)
|
||||
rars3 = register_range('rs.r3', 'r3', cur)
|
||||
|
||||
self.assertNotEqual(
|
||||
ra2.typecaster.values[0],
|
||||
rars2.typecaster.values[0])
|
||||
|
||||
self.assertRaises(psycopg2.ProgrammingError,
|
||||
register_range, 'r3', 'FailRange', cur)
|
||||
cur.execute("rollback to savepoint x;")
|
||||
|
||||
self.assertRaises(psycopg2.ProgrammingError,
|
||||
register_range, 'rs.r1', 'FailRange', cur)
|
||||
cur.execute("rollback to savepoint x;")
|
||||
|
||||
decorate_all_tests(RangeCasterTestCase, skip_if_no_range)
|
||||
|
||||
|
||||
def test_suite():
|
||||
return unittest.TestLoader().loadTestsFromName(__name__)
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user