mirror of
https://github.com/Infinidat/infi.clickhouse_orm.git
synced 2024-11-10 19:36:33 +03:00
- move NO_VALUE to utils
- dynamic generation of func variants (...OrZero, ...OrNull)
This commit is contained in:
parent
25c4a6710e
commit
9f36b17fee
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@ -25,7 +25,7 @@ class Event(models.Model):
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engine = engines.Memory()
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...
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```
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When creating a model instance, any fields you do not specify get their default value. Fields that use a default expression are assigned a sentinel value of `infi.clickhouse_orm.models.NO_VALUE` instead. For example:
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When creating a model instance, any fields you do not specify get their default value. Fields that use a default expression are assigned a sentinel value of `infi.clickhouse_orm.utils.NO_VALUE` instead. For example:
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```python
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>>> event = Event()
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>>> print(event.to_dict())
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@ -63,7 +63,7 @@ db.select('SELECT created, created_date, username, name FROM $db.event', model_c
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# created_date and username will contain a default value
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db.select('SELECT * FROM $db.event', model_class=Event)
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```
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When creating a model instance, any alias or materialized fields are assigned a sentinel value of `infi.clickhouse_orm.models.NO_VALUE` since their real values can only be known after insertion to the database.
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When creating a model instance, any alias or materialized fields are assigned a sentinel value of `infi.clickhouse_orm.utils.NO_VALUE` since their real values can only be known after insertion to the database.
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## codec
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@ -1,7 +1,9 @@
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from datetime import date, datetime, tzinfo
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import functools
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from functools import wraps
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from inspect import signature, Parameter
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from types import FunctionType
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from .utils import is_iterable, comma_join
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from .utils import is_iterable, comma_join, NO_VALUE
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from .query import Cond
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@ -9,7 +11,7 @@ def binary_operator(func):
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"""
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Decorates a function to mark it as a binary operator.
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"""
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@functools.wraps(func)
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@wraps(func)
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def wrapper(*args, **kwargs):
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ret = func(*args, **kwargs)
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ret.is_binary_operator = True
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@ -17,6 +19,29 @@ def binary_operator(func):
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return wrapper
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def type_conversion(func):
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"""
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Decorates a function to mark it as a type conversion function.
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"""
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@wraps(func)
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def wrapper(*args, **kwargs):
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return func(*args, **kwargs)
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wrapper.f_type = 'type_conversion'
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return wrapper
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def aggregate(func):
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"""
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Decorates a function to mark it as an aggregate function.
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"""
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@wraps(func)
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def wrapper(*args, **kwargs):
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return func(*args, **kwargs)
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wrapper.f_type = 'aggregate'
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return wrapper
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class FunctionOperatorsMixin(object):
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"""
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A mixin for implementing Python operators using F objects.
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@ -104,7 +129,57 @@ class FunctionOperatorsMixin(object):
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return F._not(self)
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class F(Cond, FunctionOperatorsMixin):
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class FMeta(type):
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FUNCTION_COMBINATORS = {
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'type_conversion': [
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{'suffix': 'OrZero'},
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{'suffix': 'OrNull'},
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],
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'aggregate': [
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{'suffix': 'OrDefault'},
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{'suffix': 'OrNull'},
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{'suffix': 'If', 'args': ['cond']},
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{'suffix': 'OrDefaultIf', 'args': ['cond']},
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{'suffix': 'OrNullIf', 'args': ['cond']},
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]
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}
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def __init__(cls, name, bases, dct):
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for name, obj in dct.items():
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if hasattr(obj, '__func__'):
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f_type = getattr(obj.__func__, 'f_type', '')
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for combinator in FMeta.FUNCTION_COMBINATORS.get(f_type, []):
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new_name = name + combinator['suffix']
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FMeta._add_func(cls, obj.__func__, new_name, combinator.get('args'))
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@staticmethod
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def _add_func(cls, base_func, new_name, extra_args):
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"""
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Adds a new func to the cls, based on the signature of the given base_func but with a new name.
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"""
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# Get the function's signature
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sig = signature(base_func)
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new_sig = str(sig)[1 : -1] # omit the parentheses
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args = comma_join(sig.parameters)
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# Add extra args
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if extra_args:
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if args:
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args = comma_join([args] + extra_args)
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new_sig = comma_join([new_sig] + extra_args)
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else:
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args = comma_join(extra_args)
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new_sig = comma_join(extra_args)
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# Get default values for args
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argdefs = tuple(p.default for p in sig.parameters.values() if p.default != Parameter.empty)
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# Build the new function
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new_code = compile(f'def {new_name}({new_sig}): return F("{new_name}", {args})', __file__, 'exec')
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new_func = FunctionType(code=new_code.co_consts[0], globals=globals(), name=new_name, argdefs=argdefs)
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# Attach to class
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setattr(cls, new_name, new_func)
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class F(Cond, FunctionOperatorsMixin, metaclass=FMeta):
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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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@ -135,7 +210,7 @@ class F(Cond, FunctionOperatorsMixin):
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else:
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prefix = self.name
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sep = ', '
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arg_strs = (F._arg_to_sql(arg) for arg in self.args)
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arg_strs = (F._arg_to_sql(arg) for arg in self.args if arg != NO_VALUE)
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return prefix + '(' + sep.join(arg_strs) + ')'
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@staticmethod
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@ -392,168 +467,143 @@ class F(Cond, FunctionOperatorsMixin):
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return F('formatDateTime', d, format, timezone)
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@staticmethod
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def addDays(d, n, timezone=None):
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return F('addDays', d, n, timezone) if timezone else F('addDays', d, n)
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def addDays(d, n, timezone=NO_VALUE):
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return F('addDays', d, n, timezone)
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@staticmethod
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def addHours(d, n, timezone=None):
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return F('addHours', d, n, timezone) if timezone else F('addHours', d, n)
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def addHours(d, n, timezone=NO_VALUE):
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return F('addHours', d, n, timezone)
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@staticmethod
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def addMinutes(d, n, timezone=None):
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return F('addMinutes', d, n, timezone) if timezone else F('addMinutes', d, n)
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def addMinutes(d, n, timezone=NO_VALUE):
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return F('addMinutes', d, n, timezone)
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@staticmethod
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def addMonths(d, n, timezone=None):
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return F('addMonths', d, n, timezone) if timezone else F('addMonths', d, n)
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def addMonths(d, n, timezone=NO_VALUE):
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return F('addMonths', d, n, timezone)
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@staticmethod
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def addQuarters(d, n, timezone=None):
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return F('addQuarters', d, n, timezone) if timezone else F('addQuarters', d, n)
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def addQuarters(d, n, timezone=NO_VALUE):
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return F('addQuarters', d, n, timezone)
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@staticmethod
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def addSeconds(d, n, timezone=None):
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return F('addSeconds', d, n, timezone) if timezone else F('addSeconds', d, n)
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def addSeconds(d, n, timezone=NO_VALUE):
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return F('addSeconds', d, n, timezone)
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@staticmethod
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def addWeeks(d, n, timezone=None):
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return F('addWeeks', d, n, timezone) if timezone else F('addWeeks', d, n)
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def addWeeks(d, n, timezone=NO_VALUE):
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return F('addWeeks', d, n, timezone)
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@staticmethod
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def addYears(d, n, timezone=None):
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return F('addYears', d, n, timezone) if timezone else F('addYears', d, n)
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def addYears(d, n, timezone=NO_VALUE):
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return F('addYears', d, n, timezone)
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@staticmethod
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def subtractDays(d, n, timezone=None):
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return F('subtractDays', d, n, timezone) if timezone else F('subtractDays', d, n)
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def subtractDays(d, n, timezone=NO_VALUE):
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return F('subtractDays', d, n, timezone)
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@staticmethod
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def subtractHours(d, n, timezone=None):
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return F('subtractHours', d, n, timezone) if timezone else F('subtractHours', d, n)
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def subtractHours(d, n, timezone=NO_VALUE):
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return F('subtractHours', d, n, timezone)
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@staticmethod
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def subtractMinutes(d, n, timezone=None):
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return F('subtractMinutes', d, n, timezone) if timezone else F('subtractMinutes', d, n)
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def subtractMinutes(d, n, timezone=NO_VALUE):
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return F('subtractMinutes', d, n, timezone)
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@staticmethod
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def subtractMonths(d, n, timezone=None):
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return F('subtractMonths', d, n, timezone) if timezone else F('subtractMonths', d, n)
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def subtractMonths(d, n, timezone=NO_VALUE):
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return F('subtractMonths', d, n, timezone)
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@staticmethod
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def subtractQuarters(d, n, timezone=None):
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return F('subtractQuarters', d, n, timezone) if timezone else F('subtractQuarters', d, n)
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def subtractQuarters(d, n, timezone=NO_VALUE):
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return F('subtractQuarters', d, n, timezone)
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@staticmethod
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def subtractSeconds(d, n, timezone=None):
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return F('subtractSeconds', d, n, timezone) if timezone else F('subtractSeconds', d, n)
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def subtractSeconds(d, n, timezone=NO_VALUE):
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return F('subtractSeconds', d, n, timezone)
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@staticmethod
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def subtractWeeks(d, n, timezone=None):
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return F('subtractWeeks', d, n, timezone) if timezone else F('subtractWeeks', d, n)
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def subtractWeeks(d, n, timezone=NO_VALUE):
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return F('subtractWeeks', d, n, timezone)
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@staticmethod
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def subtractYears(d, n, timezone=None):
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return F('subtractYears', d, n, timezone) if timezone else F('subtractYears', d, n)
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def subtractYears(d, n, timezone=NO_VALUE):
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return F('subtractYears', d, n, timezone)
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# Type conversion functions
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@staticmethod
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@type_conversion
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def toUInt8(x):
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return F('toUInt8', x)
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@staticmethod
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@type_conversion
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def toUInt16(x):
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return F('toUInt16', x)
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@staticmethod
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@type_conversion
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def toUInt32(x):
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return F('toUInt32', x)
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@staticmethod
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@type_conversion
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def toUInt64(x):
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return F('toUInt64', x)
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@staticmethod
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@type_conversion
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def toInt8(x):
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return F('toInt8', x)
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@staticmethod
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@type_conversion
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def toInt16(x):
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return F('toInt16', x)
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@staticmethod
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@type_conversion
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def toInt32(x):
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return F('toInt32', x)
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@staticmethod
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@type_conversion
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def toInt64(x):
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return F('toInt64', x)
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@staticmethod
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@type_conversion
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def toFloat32(x):
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return F('toFloat32', x)
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@staticmethod
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@type_conversion
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def toFloat64(x):
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return F('toFloat64', x)
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@staticmethod
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def toUInt8OrZero(x):
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return F('toUInt8OrZero', x)
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@staticmethod
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def toUInt16OrZero(x):
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return F('toUInt16OrZero', x)
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@staticmethod
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def toUInt32OrZero(x):
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return F('toUInt32OrZero', x)
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@staticmethod
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def toUInt64OrZero(x):
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return F('toUInt64OrZero', x)
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@staticmethod
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def toInt8OrZero(x):
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return F('toInt8OrZero', x)
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@staticmethod
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def toInt16OrZero(x):
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return F('toInt16OrZero', x)
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@staticmethod
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def toInt32OrZero(x):
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return F('toInt32OrZero', x)
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@staticmethod
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def toInt64OrZero(x):
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return F('toInt64OrZero', x)
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@staticmethod
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def toFloat32OrZero(x):
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return F('toFloat32OrZero', x)
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@staticmethod
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def toFloat64OrZero(x):
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return F('toFloat64OrZero', x)
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@staticmethod
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@type_conversion
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def toDecimal32(x, scale):
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return F('toDecimal32', x, scale)
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@staticmethod
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@type_conversion
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def toDecimal64(x, scale):
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return F('toDecimal64', x, scale)
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@staticmethod
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@type_conversion
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def toDecimal128(x, scale):
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return F('toDecimal128', x, scale)
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@staticmethod
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@type_conversion
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def toDate(x):
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return F('toDate', x)
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@staticmethod
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@type_conversion
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def toDateTime(x):
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return F('toDateTime', x)
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@ -574,16 +624,9 @@ class F(Cond, FunctionOperatorsMixin):
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return F('CAST', x, type)
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@staticmethod
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def parseDateTimeBestEffort(d, timezone=None):
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return F('parseDateTimeBestEffort', d, timezone) if timezone else F('parseDateTimeBestEffort', d)
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@staticmethod
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def parseDateTimeBestEffortOrNull(d, timezone=None):
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return F('parseDateTimeBestEffortOrNull', d, timezone) if timezone else F('parseDateTimeBestEffortOrNull', d)
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@staticmethod
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def parseDateTimeBestEffortOrZero(d, timezone=None):
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return F('parseDateTimeBestEffortOrZero', d, timezone) if timezone else F('parseDateTimeBestEffortOrZero', d)
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@type_conversion
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def parseDateTimeBestEffort(d, timezone=NO_VALUE):
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return F('parseDateTimeBestEffort', d, timezone)
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# Functions for working with strings
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@ -1314,90 +1357,112 @@ class F(Cond, FunctionOperatorsMixin):
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# Aggregate functions
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@staticmethod
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@aggregate
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def any(x):
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return F('any', x)
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@staticmethod
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@aggregate
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def anyHeavy(x):
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return F('anyHeavy', x)
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@staticmethod
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@aggregate
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def anyLast(x):
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return F('anyLast', x)
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@staticmethod
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@aggregate
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def argMax(x, y):
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return F('argMax', x, y)
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@staticmethod
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@aggregate
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def argMin(x, y):
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return F('argMin', x, y)
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@staticmethod
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@aggregate
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def avg(x):
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return F('avg', x)
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@staticmethod
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@aggregate
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def corr(x, y):
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return F('corr', x, y)
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@staticmethod
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@aggregate
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def count():
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return F('count')
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@staticmethod
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@aggregate
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def covarPop(x, y):
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return F('covarPop', x, y)
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@staticmethod
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@aggregate
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def covarSamp(x, y):
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return F('covarSamp', x, y)
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@staticmethod
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@aggregate
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def kurtPop(x):
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return F('kurtPop', x)
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@staticmethod
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@aggregate
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def kurtSamp(x):
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return F('kurtSamp', x)
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@staticmethod
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@aggregate
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def min(x):
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return F('min', x)
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@staticmethod
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@aggregate
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def max(x):
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return F('max', x)
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@staticmethod
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@aggregate
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def skewPop(x):
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return F('skewPop', x)
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@staticmethod
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@aggregate
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def skewSamp(x):
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return F('skewSamp', x)
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@staticmethod
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@aggregate
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def sum(x):
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return F('sum', x)
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@staticmethod
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@aggregate
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def uniq(*args):
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return F('uniq', *args)
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@staticmethod
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@aggregate
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def uniqExact(*args):
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return F('uniqExact', *args)
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@staticmethod
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@aggregate
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def uniqHLL12(*args):
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return F('uniqHLL12', *args)
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@staticmethod
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@aggregate
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def varPop(x):
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return F('varPop', x)
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@staticmethod
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@aggregate
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def varSamp(x):
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return F('varSamp', x)
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|
|
@ -7,7 +7,7 @@ from six import reraise
|
|||
import pytz
|
||||
|
||||
from .fields import Field, StringField
|
||||
from .utils import parse_tsv
|
||||
from .utils import parse_tsv, NO_VALUE
|
||||
from .query import QuerySet
|
||||
from .funcs import F
|
||||
from .engines import Merge, Distributed
|
||||
|
@ -15,17 +15,6 @@ from .engines import Merge, Distributed
|
|||
logger = getLogger('clickhouse_orm')
|
||||
|
||||
|
||||
class NoValue:
|
||||
'''
|
||||
A sentinel for fields with an expression for a default value,
|
||||
that were not assigned a value yet.
|
||||
'''
|
||||
def __repr__(self):
|
||||
return '<NO_VALUE>'
|
||||
|
||||
NO_VALUE = NoValue()
|
||||
|
||||
|
||||
class ModelBase(type):
|
||||
'''
|
||||
A metaclass for ORM models. It adds the _fields list to model classes.
|
||||
|
|
|
@ -112,3 +112,14 @@ def is_iterable(obj):
|
|||
return True
|
||||
except TypeError:
|
||||
return False
|
||||
|
||||
|
||||
class NoValue:
|
||||
'''
|
||||
A sentinel for fields with an expression for a default value,
|
||||
that were not assigned a value yet.
|
||||
'''
|
||||
def __repr__(self):
|
||||
return 'NO_VALUE'
|
||||
|
||||
NO_VALUE = NoValue()
|
||||
|
|
|
@ -4,6 +4,7 @@ from .test_querysets import SampleModel
|
|||
from datetime import date, datetime, tzinfo, timedelta
|
||||
from ipaddress import IPv4Address, IPv6Address
|
||||
from infi.clickhouse_orm.database import ServerError
|
||||
from infi.clickhouse_orm.utils import NO_VALUE
|
||||
|
||||
|
||||
class FuncsTestCase(TestCaseWithData):
|
||||
|
@ -21,21 +22,21 @@ class FuncsTestCase(TestCaseWithData):
|
|||
self.assertEqual(count, expected_count)
|
||||
self.assertEqual(qs.count(), expected_count)
|
||||
|
||||
def _test_func(self, func, expected_value=None):
|
||||
def _test_func(self, func, expected_value=NO_VALUE):
|
||||
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 result else '<empty>')
|
||||
if expected_value is not None:
|
||||
if expected_value != NO_VALUE:
|
||||
self.assertEqual(result[0].value, expected_value)
|
||||
return result[0].value if result else None
|
||||
|
||||
def _test_aggr(self, func, expected_value=None):
|
||||
def _test_aggr(self, func, expected_value=NO_VALUE):
|
||||
qs = Person.objects_in(self.database).aggregate(value=func)
|
||||
logger.info(qs.as_sql())
|
||||
result = list(qs)
|
||||
logger.info('\t==> %s', result[0].value if result else '<empty>')
|
||||
if expected_value is not None:
|
||||
if expected_value != NO_VALUE:
|
||||
self.assertEqual(result[0].value, expected_value)
|
||||
return result[0].value if result else None
|
||||
|
||||
|
@ -316,7 +317,7 @@ class FuncsTestCase(TestCaseWithData):
|
|||
try:
|
||||
self._test_func(F.base64Decode(F.base64Encode('Hello')), 'Hello')
|
||||
self._test_func(F.tryBase64Decode(F.base64Encode('Hello')), 'Hello')
|
||||
self._test_func(F.tryBase64Decode(':-)'), None)
|
||||
self._test_func(F.tryBase64Decode(':-)'))
|
||||
except ServerError as e:
|
||||
# ClickHouse version that doesn't support these functions
|
||||
raise unittest.SkipTest(e.message)
|
||||
|
@ -548,3 +549,27 @@ class FuncsTestCase(TestCaseWithData):
|
|||
self._test_aggr(F.varPop(Person.height))
|
||||
self._test_aggr(F.varSamp(Person.height))
|
||||
|
||||
def test_aggregate_funcs__or_default(self):
|
||||
self.database.raw('TRUNCATE TABLE person')
|
||||
self._test_aggr(F.countOrDefault(), 0)
|
||||
self._test_aggr(F.maxOrDefault(Person.height), 0)
|
||||
|
||||
def test_aggregate_funcs__or_null(self):
|
||||
self.database.raw('TRUNCATE TABLE person')
|
||||
self._test_aggr(F.countOrNull(), None)
|
||||
self._test_aggr(F.maxOrNull(Person.height), None)
|
||||
|
||||
def test_aggregate_funcs__if(self):
|
||||
self._test_aggr(F.argMinIf(Person.first_name, Person.height, Person.last_name > 'H'))
|
||||
self._test_aggr(F.countIf(Person.last_name > 'H'), 57)
|
||||
self._test_aggr(F.minIf(Person.height, Person.last_name > 'H'), 1.6)
|
||||
|
||||
def test_aggregate_funcs__or_default_if(self):
|
||||
self._test_aggr(F.argMinOrDefaultIf(Person.first_name, Person.height, Person.last_name > 'Z'))
|
||||
self._test_aggr(F.countOrDefaultIf(Person.last_name > 'Z'), 0)
|
||||
self._test_aggr(F.minOrDefaultIf(Person.height, Person.last_name > 'Z'), 0)
|
||||
|
||||
def test_aggregate_funcs__or_null_if(self):
|
||||
self._test_aggr(F.argMinOrNullIf(Person.first_name, Person.height, Person.last_name > 'Z'))
|
||||
self._test_aggr(F.countOrNullIf(Person.last_name > 'Z'), None)
|
||||
self._test_aggr(F.minOrNullIf(Person.height, Person.last_name > 'Z'), None)
|
||||
|
|
Loading…
Reference in New Issue
Block a user