mirror of
https://github.com/Infinidat/infi.clickhouse_orm.git
synced 2024-11-25 02:03:46 +03:00
Functions WIP
This commit is contained in:
Itai Shirav
parent
475492a65f
commit
962a1673f9
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@ -8,15 +8,18 @@ from calendar import timegm
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from decimal import Decimal, localcontext
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from .utils import escape, parse_array, comma_join
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from .query import F
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class Field(object):
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'''
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Abstract base class for all field types.
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'''
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creation_counter = 0
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class_default = 0
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db_type = None
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name = None # this is set by the parent model
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parent = None # this is set by the parent model
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creation_counter = 0 # used for keeping the model fields ordered
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class_default = 0 # should be overridden by concrete subclasses
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db_type = None # should be overridden by concrete subclasses
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def __init__(self, default=None, alias=None, materialized=None, readonly=None):
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assert (None, None) in {(default, alias), (alias, materialized), (default, materialized)}, \
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@ -96,6 +99,26 @@ class Field(object):
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inner_field = getattr(inner_field, 'inner_field', None)
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return False
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# Support comparison operators (for use in querysets)
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def __lt__(self, other):
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return F.less(self, other)
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def __le__(self, other):
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return F.lessOrEquals(self, other)
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def __eq__(self, other):
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return F.equals(self, other)
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def __ne__(self, other):
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return F.notEquals(self, other)
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def __gt__(self, other):
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return F.greater(self, other)
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def __ge__(self, other):
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return F.greaterOrEquals(self, other)
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class StringField(Field):
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@ -43,7 +43,14 @@ class ModelBase(type):
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_writable_fields=OrderedDict([f for f in fields if not f[1].readonly]),
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_defaults=defaults
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)
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return super(ModelBase, cls).__new__(cls, str(name), bases, attrs)
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model = super(ModelBase, cls).__new__(cls, str(name), bases, attrs)
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# Let each field know its parent and its own name
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for n, f in fields:
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setattr(f, 'parent', model)
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setattr(f, 'name', n)
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return model
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@classmethod
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def create_ad_hoc_model(cls, fields, model_name='AdHocModel'):
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@ -3,7 +3,8 @@ import six
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import pytz
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from copy import copy
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from math import ceil
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from .utils import comma_join
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from datetime import date, datetime
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from .utils import comma_join, is_iterable
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# TODO
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@ -22,6 +23,11 @@ class Operator(object):
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"""
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raise NotImplementedError # pragma: no cover
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def _value_to_sql(self, field, value, quote=True):
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if isinstance(value, F):
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return value.to_sql()
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return field.to_db_string(field.to_python(value, pytz.utc), quote)
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class SimpleOperator(Operator):
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"""
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@ -34,7 +40,7 @@ class SimpleOperator(Operator):
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def to_sql(self, model_cls, field_name, value):
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field = getattr(model_cls, field_name)
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value = field.to_db_string(field.to_python(value, pytz.utc))
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value = self._value_to_sql(field, value)
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if value == '\\N' and self._sql_for_null is not None:
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return ' '.join([field_name, self._sql_for_null])
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return ' '.join([field_name, self._sql_operator, value])
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@ -56,7 +62,7 @@ class InOperator(Operator):
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elif isinstance(value, six.string_types):
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pass
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else:
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value = comma_join([field.to_db_string(field.to_python(v, pytz.utc)) for v in value])
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value = comma_join([self._value_to_sql(field, v) for v in value])
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return '%s IN (%s)' % (field_name, value)
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@ -72,7 +78,7 @@ class LikeOperator(Operator):
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def to_sql(self, model_cls, field_name, value):
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field = getattr(model_cls, field_name)
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value = field.to_db_string(field.to_python(value, pytz.utc), quote=False)
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value = self._value_to_sql(field, value, quote=False)
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value = value.replace('\\', '\\\\').replace('%', '\\\\%').replace('_', '\\\\_')
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pattern = self._pattern.format(value)
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if self._case_sensitive:
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@ -88,7 +94,7 @@ class IExactOperator(Operator):
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def to_sql(self, model_cls, field_name, value):
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field = getattr(model_cls, field_name)
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value = field.to_db_string(field.to_python(value, pytz.utc))
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value = self._value_to_sql(field, value)
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return 'lowerUTF8(%s) = lowerUTF8(%s)' % (field_name, value)
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@ -117,10 +123,8 @@ class BetweenOperator(Operator):
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def to_sql(self, model_cls, field_name, value):
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field = getattr(model_cls, field_name)
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value0 = field.to_db_string(
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field.to_python(value[0], pytz.utc)) if value[0] is not None or len(str(value[0])) > 0 else None
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value1 = field.to_db_string(
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field.to_python(value[1], pytz.utc)) if value[1] is not None or len(str(value[1])) > 0 else None
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value0 = self._value_to_sql(field, value[0]) if value[0] is not None or len(str(value[0])) > 0 else None
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value1 = self._value_to_sql(field, value[1]) if value[1] is not None or len(str(value[1])) > 0 else None
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if value0 and value1:
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return '%s BETWEEN %s AND %s' % (field_name, value0, value1)
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if value0 and not value1:
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@ -153,11 +157,19 @@ register_operator('iendswith', LikeOperator('%{}', False))
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register_operator('iexact', IExactOperator())
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class FOV(object):
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class Cond(object):
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"""
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An object for storing Field + Operator + Value.
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An abstract object for storing a single query condition Field + Operator + Value.
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"""
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def to_sql(self, model_cls):
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raise NotImplementedError
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class FieldCond(Cond):
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"""
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A single query condition made up of Field + Operator + Value.
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"""
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def __init__(self, field_name, operator, value):
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self._field_name = field_name
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self._operator = _operators.get(operator)
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@ -171,13 +183,300 @@ class FOV(object):
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return self._operator.to_sql(model_cls, self._field_name, self._value)
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class F(Cond):
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"""
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Represents a database function call and its arguments.
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It doubles as a query condition when the function returns a boolean result.
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"""
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def __init__(self, name, *args):
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self.name = name
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self.args = args
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def to_sql(self, *args):
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args_sql = comma_join(self.arg_to_sql(arg) for arg in self.args)
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return self.name + '(' + args_sql + ')'
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def arg_to_sql(self, arg):
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from .fields import Field, StringField, DateTimeField, DateField
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if isinstance(arg, F):
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return arg.to_sql()
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if isinstance(arg, Field):
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return "`%s`" % arg.name
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if isinstance(arg, six.string_types):
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return StringField().to_db_string(arg)
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if isinstance(arg, datetime):
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return DateTimeField().to_db_string(arg)
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if isinstance(arg, date):
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return DateField().to_db_string(arg)
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if isinstance(arg, bool):
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return six.text_type(int(arg))
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if arg is None:
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return 'NULL'
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if is_iterable(arg):
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return '[' + comma_join(self.arg_to_sql(x) for x in arg) + ']'
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return six.text_type(arg)
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# Support comparison operators with F objects
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def __lt__(self, other):
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return F.less(self, other)
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def __le__(self, other):
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return F.lessOrEquals(self, other)
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def __eq__(self, other):
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return F.equals(self, other)
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def __ne__(self, other):
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return F.notEquals(self, other)
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def __gt__(self, other):
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return F.greater(self, other)
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def __ge__(self, other):
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return F.greaterOrEquals(self, other)
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# Support arithmetic operations on F objects
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def __add__(self, other):
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return F.plus(self, other)
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def __radd__(self, other):
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return F.plus(other, self)
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def __sub__(self, other):
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return F.minus(self, other)
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def __rsub__(self, other):
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return F.minus(other, self)
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def __mul__(self, other):
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return F.multiply(self, other)
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def __rmul__(self, other):
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return F.multiply(other, self)
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def __div__(self, other):
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return F.divide(self, other)
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def __rdiv__(self, other):
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return F.divide(other, self)
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def __mod__(self, other):
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return F.modulo(self, other)
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def __rmod__(self, other):
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return F.modulo(other, self)
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def __neg__(self):
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return F.negate(self)
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def __pos__(self):
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return self
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# Arithmetic functions
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@staticmethod
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def plus(a, b):
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return F('plus', a, b)
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@staticmethod
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def minus(a, b):
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return F('minus', a, b)
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@staticmethod
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def multiply(a, b):
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return F('multiply', a, b)
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@staticmethod
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def divide(a, b):
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return F('divide', a, b)
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@staticmethod
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def intDiv(a, b):
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return F('intDiv', a, b)
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@staticmethod
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def intDivOrZero(a, b):
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return F('intDivOrZero', a, b)
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@staticmethod
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def modulo(a, b):
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return F('modulo', a, b)
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@staticmethod
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def negate(a):
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return F('negate', a)
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@staticmethod
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def abs(a):
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return F('abs', a)
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@staticmethod
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def gcd(a, b):
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return F('gcd',a, b)
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@staticmethod
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def lcm(a, b):
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return F('lcm', a, b)
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# Comparison functions
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@staticmethod
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def equals(a, b):
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return F('equals', a, b)
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@staticmethod
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def notEquals(a, b):
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return F('notEquals', a, b)
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@staticmethod
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def less(a, b):
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return F('less', a, b)
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@staticmethod
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def greater(a, b):
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return F('greater', a, b)
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@staticmethod
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def lessOrEquals(a, b):
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return F('lessOrEquals', a, b)
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@staticmethod
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def greaterOrEquals(a, b):
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return F('greaterOrEquals', a, b)
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# Functions for working with dates and times
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@staticmethod
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def toYear(d):
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return F('toYear', d)
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@staticmethod
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def toMonth(d):
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return F('toMonth', d)
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@staticmethod
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def toDayOfMonth(d):
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return F('toDayOfMonth', d)
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@staticmethod
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def toDayOfWeek(d):
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return F('toDayOfWeek', d)
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@staticmethod
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def toHour(d):
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return F('toHour', d)
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@staticmethod
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def toMinute(d):
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return F('toMinute', d)
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@staticmethod
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def toSecond(d):
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return F('toSecond', d)
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@staticmethod
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def toMonday(d):
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return F('toMonday', d)
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@staticmethod
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def toStartOfMonth(d):
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return F('toStartOfMonth', d)
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@staticmethod
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def toStartOfQuarter(d):
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return F('toStartOfQuarter', d)
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@staticmethod
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def toStartOfYear(d):
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return F('toStartOfYear', d)
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@staticmethod
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def toStartOfMinute(d):
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return F('toStartOfMinute', d)
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@staticmethod
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def toStartOfFiveMinute(d):
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return F('toStartOfFiveMinute', d)
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@staticmethod
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def toStartOfFifteenMinutes(d):
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return F('toStartOfFifteenMinutes', d)
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@staticmethod
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def toStartOfHour(d):
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return F('toStartOfHour', d)
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@staticmethod
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def toStartOfDay(d):
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return F('toStartOfDay', d)
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@staticmethod
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def toTime(d):
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return F('toTime', d)
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@staticmethod
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def toRelativeYearNum(d, timezone=''):
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return F('toRelativeYearNum', d, timezone)
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@staticmethod
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def toRelativeMonthNum(d, timezone=''):
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return F('toRelativeMonthNum', d, timezone)
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@staticmethod
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def toRelativeWeekNum(d, timezone=''):
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return F('toRelativeWeekNum', d, timezone)
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@staticmethod
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def toRelativeDayNum(d, timezone=''):
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return F('toRelativeDayNum', d, timezone)
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@staticmethod
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def toRelativeHourNum(d, timezone=''):
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return F('toRelativeHourNum', d, timezone)
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@staticmethod
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def toRelativeMinuteNum(d, timezone=''):
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return F('toRelativeMinuteNum', d, timezone)
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@staticmethod
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def toRelativeSecondNum(d, timezone=''):
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return F('toRelativeSecondNum', d, timezone)
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@staticmethod
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def now():
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return F('now')
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@staticmethod
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def today():
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return F('today')
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@staticmethod
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def yesterday(d):
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return F('yesterday')
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@staticmethod
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def timeSlot(d):
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return F('timeSlot', d)
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@staticmethod
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def timeSlots(start_time, duration):
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return F('timeSlots', start_time, duration)
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@staticmethod
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def formatDateTime(d, format, timezone=''):
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return F('formatDateTime', d, format, timezone)
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class Q(object):
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AND_MODE = ' AND '
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OR_MODE = ' OR '
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def __init__(self, **filter_fields):
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self._fovs = [self._build_fov(k, v) for k, v in six.iteritems(filter_fields)]
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def __init__(self, *filter_funcs, **filter_fields):
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self._conds = list(filter_funcs) + [self._build_cond(k, v) for k, v in six.iteritems(filter_fields)]
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self._l_child = None
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self._r_child = None
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self._negate = False
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@ -191,16 +490,16 @@ class Q(object):
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q._mode = mode # AND/OR
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return q
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def _build_fov(self, key, value):
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def _build_cond(self, key, value):
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if '__' in key:
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field_name, operator = key.rsplit('__', 1)
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else:
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field_name, operator = key, 'eq'
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return FOV(field_name, operator, value)
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return FieldCond(field_name, operator, value)
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def to_sql(self, model_cls):
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if self._fovs:
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sql = ' {} '.format(self._mode).join(fov.to_sql(model_cls) for fov in self._fovs)
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if self._conds:
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sql = self._mode.join(cond.to_sql(model_cls) for cond in self._conds)
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else:
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if self._l_child and self._r_child:
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sql = '({} {} {})'.format(
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@ -348,10 +647,16 @@ class QuerySet(object):
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Add q object to query if it specified.
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"""
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qs = copy(self)
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if q:
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qs._q = list(self._q) + list(q)
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qs._q = list(self._q)
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for arg in q:
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if isinstance(arg, Q):
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qs._q.append(arg)
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elif isinstance(arg, F):
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qs._q.append(Q(arg))
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else:
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qs._q = list(self._q) + [Q(**filter_fields)]
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raise TypeError('Invalid argument "%r" to queryset filter' % arg)
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if filter_fields:
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qs._q += [Q(**filter_fields)]
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return qs
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def exclude(self, **filter_fields):
|
||||
|
|
@ -502,3 +807,5 @@ class AggregateQuerySet(QuerySet):
|
|||
sql = u'SELECT count() FROM (%s)' % self.as_sql()
|
||||
raw = self._database.raw(sql)
|
||||
return int(raw) if raw else 0
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -98,3 +98,14 @@ def comma_join(items):
|
|||
Joins an iterable of strings with commas.
|
||||
"""
|
||||
return ', '.join(items)
|
||||
|
||||
|
||||
def is_iterable(obj):
|
||||
"""
|
||||
Checks if the given object is iterable.
|
||||
"""
|
||||
try:
|
||||
iter(obj)
|
||||
return True
|
||||
except TypeError:
|
||||
return False
|
||||
|
|
|
|||
|
|
@ -3,11 +3,13 @@ from __future__ import unicode_literals, print_function
|
|||
import unittest
|
||||
|
||||
from infi.clickhouse_orm.database import Database
|
||||
from infi.clickhouse_orm.query import Q
|
||||
from infi.clickhouse_orm.query import Q, F
|
||||
from .base_test_with_data import *
|
||||
import logging
|
||||
from datetime import date, datetime
|
||||
|
||||
from logging import getLogger
|
||||
logger = getLogger('tests')
|
||||
|
||||
try:
|
||||
Enum # exists in Python 3.4+
|
||||
except NameError:
|
||||
|
|
@ -21,11 +23,11 @@ class QuerySetTestCase(TestCaseWithData):
|
|||
self.database.insert(self._sample_data())
|
||||
|
||||
def _test_qs(self, qs, expected_count):
|
||||
logging.info(qs.as_sql())
|
||||
logger.info(qs.as_sql())
|
||||
count = 0
|
||||
for instance in qs:
|
||||
count += 1
|
||||
logging.info('\t[%d]\t%s' % (count, instance.to_dict()))
|
||||
logger.info('\t[%d]\t%s' % (count, instance.to_dict()))
|
||||
self.assertEqual(count, expected_count)
|
||||
self.assertEqual(qs.count(), expected_count)
|
||||
|
||||
|
|
@ -249,6 +251,17 @@ class QuerySetTestCase(TestCaseWithData):
|
|||
self._test_qs(qs[70:80], 10)
|
||||
self._test_qs(qs[80:], 20)
|
||||
|
||||
def test_mixed_filter(self):
|
||||
qs = Person.objects_in(self.database)
|
||||
qs = qs.filter(Q(first_name='a'), F('greater', Person.height, 1.7), last_name='b')
|
||||
self.assertEqual(qs.conditions_as_sql(),
|
||||
"first_name = 'a' AND greater(`height`, 1.7) AND last_name = 'b'")
|
||||
|
||||
def test_invalid_filter(self):
|
||||
qs = Person.objects_in(self.database)
|
||||
with self.assertRaises(TypeError):
|
||||
qs.filter('foo')
|
||||
|
||||
|
||||
class AggregateTestCase(TestCaseWithData):
|
||||
|
||||
|
|
@ -378,6 +391,136 @@ class AggregateTestCase(TestCaseWithData):
|
|||
self.assertEqual(qs.conditions_as_sql(), 'the__next__number > 1')
|
||||
|
||||
|
||||
class FuncsTestCase(TestCaseWithData):
|
||||
|
||||
def setUp(self):
|
||||
super(FuncsTestCase, self).setUp()
|
||||
self.database.insert(self._sample_data())
|
||||
|
||||
def _test_qs(self, qs, expected_count):
|
||||
logger.info(qs.as_sql())
|
||||
count = 0
|
||||
for instance in qs:
|
||||
count += 1
|
||||
logger.info('\t[%d]\t%s' % (count, instance.to_dict()))
|
||||
self.assertEqual(count, expected_count)
|
||||
self.assertEqual(qs.count(), expected_count)
|
||||
|
||||
def _test_func(self, func, expected_value=None):
|
||||
sql = 'SELECT %s AS value' % func.to_sql()
|
||||
logger.info(sql)
|
||||
result = list(self.database.select(sql))
|
||||
logger.info('\t==> %s', result[0].value)
|
||||
if expected_value is not None:
|
||||
self.assertEqual(result[0].value, expected_value)
|
||||
|
||||
def test_func_to_sql(self):
|
||||
# No args
|
||||
self.assertEqual(F('func').to_sql(), 'func()')
|
||||
# String args
|
||||
self.assertEqual(F('func', "Wendy's", u"Wendy's").to_sql(), "func('Wendy\\'s', 'Wendy\\'s')")
|
||||
# Numeric args
|
||||
self.assertEqual(F('func', 1, 1.1, Decimal('3.3')).to_sql(), "func(1, 1.1, 3.3)")
|
||||
# Date args
|
||||
self.assertEqual(F('func', date(2018, 12, 31)).to_sql(), "func('2018-12-31')")
|
||||
# Datetime args
|
||||
self.assertEqual(F('func', datetime(2018, 12, 31)).to_sql(), "func('1546214400')")
|
||||
# Boolean args
|
||||
self.assertEqual(F('func', True, False).to_sql(), "func(1, 0)")
|
||||
# Null args
|
||||
self.assertEqual(F('func', None).to_sql(), "func(NULL)")
|
||||
# Fields as args
|
||||
self.assertEqual(F('func', SampleModel.color).to_sql(), "func(`color`)")
|
||||
# Funcs as args
|
||||
self.assertEqual(F('func', F('sqrt', 25)).to_sql(), 'func(sqrt(25))')
|
||||
# Iterables as args
|
||||
x = [1, 'z', F('foo', 17)]
|
||||
for y in [x, tuple(x), iter(x)]:
|
||||
self.assertEqual(F('func', y, 5).to_sql(), "func([1, 'z', foo(17)], 5)")
|
||||
self.assertEqual(F('func', [(1, 2), (3, 4)]).to_sql(), "func([[1, 2], [3, 4]])")
|
||||
|
||||
def test_filter_float_field(self):
|
||||
qs = Person.objects_in(self.database)
|
||||
# Height > 2
|
||||
self._test_qs(qs.filter(F.greater(Person.height, 2)), 0)
|
||||
self._test_qs(qs.filter(Person.height > 2), 0)
|
||||
# Height > 1.61
|
||||
self._test_qs(qs.filter(F.greater(Person.height, 1.61)), 96)
|
||||
self._test_qs(qs.filter(Person.height > 1.61), 96)
|
||||
# Height < 1.61
|
||||
self._test_qs(qs.filter(F.less(Person.height, 1.61)), 4)
|
||||
self._test_qs(qs.filter(Person.height < 1.61), 4)
|
||||
|
||||
def test_filter_date_field(self):
|
||||
qs = Person.objects_in(self.database)
|
||||
# People born on the 30th
|
||||
self._test_qs(qs.filter(F('equals', F('toDayOfMonth', Person.birthday), 30)), 3)
|
||||
self._test_qs(qs.filter(F('toDayOfMonth', Person.birthday) == 30), 3)
|
||||
self._test_qs(qs.filter(F.toDayOfMonth(Person.birthday) == 30), 3)
|
||||
# People born on Sunday
|
||||
self._test_qs(qs.filter(F('equals', F('toDayOfWeek', Person.birthday), 7)), 18)
|
||||
self._test_qs(qs.filter(F('toDayOfWeek', Person.birthday) == 7), 18)
|
||||
self._test_qs(qs.filter(F.toDayOfWeek(Person.birthday) == 7), 18)
|
||||
# People born on 1976-10-01
|
||||
self._test_qs(qs.filter(F('equals', Person.birthday, '1976-10-01')), 1)
|
||||
self._test_qs(qs.filter(F('equals', Person.birthday, date(1976, 10, 01))), 1)
|
||||
self._test_qs(qs.filter(Person.birthday == date(1976, 10, 01)), 1)
|
||||
|
||||
def test_func_as_field_value(self):
|
||||
qs = Person.objects_in(self.database)
|
||||
self._test_qs(qs.filter(height__gt=F.plus(1, 0.61)), 96)
|
||||
self._test_qs(qs.exclude(birthday=F.today()), 100)
|
||||
self._test_qs(qs.filter(birthday__between=['1970-01-01', F.today()]), 100)
|
||||
|
||||
def test_comparison_operators(self):
|
||||
one = F.plus(1, 0)
|
||||
two = F.plus(1, 1)
|
||||
self._test_func(one > one, 0)
|
||||
self._test_func(two > one, 1)
|
||||
self._test_func(one >= two, 0)
|
||||
self._test_func(one >= one, 1)
|
||||
self._test_func(one < one, 0)
|
||||
self._test_func(one < two, 1)
|
||||
self._test_func(two <= one, 0)
|
||||
self._test_func(one <= one, 1)
|
||||
self._test_func(one == two, 0)
|
||||
self._test_func(one == one, 1)
|
||||
self._test_func(one != one, 0)
|
||||
self._test_func(one != two, 1)
|
||||
|
||||
def test_arithmetic_operators(self):
|
||||
one = F.plus(1, 0)
|
||||
two = F.plus(1, 1)
|
||||
# +
|
||||
self._test_func(one + two, 3)
|
||||
self._test_func(one + 2, 3)
|
||||
self._test_func(2 + one, 3)
|
||||
# -
|
||||
self._test_func(one - two, -1)
|
||||
self._test_func(one - 2, -1)
|
||||
self._test_func(1 - two, -1)
|
||||
# *
|
||||
self._test_func(one * two, 2)
|
||||
self._test_func(one * 2, 2)
|
||||
self._test_func(1 * two, 2)
|
||||
# /
|
||||
self._test_func(one / two, 0.5)
|
||||
self._test_func(one / 2, 0.5)
|
||||
self._test_func(1 / two, 0.5)
|
||||
# %
|
||||
self._test_func(one % two, 1)
|
||||
self._test_func(one % 2, 1)
|
||||
self._test_func(1 % two, 1)
|
||||
# sign
|
||||
self._test_func(-one, -1)
|
||||
self._test_func(--one, 1)
|
||||
self._test_func(+one, 1)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Color = Enum('Color', u'red blue green yellow brown white black')
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user