556 lines
24 KiB
Python
556 lines
24 KiB
Python
from __future__ import unicode_literals
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import contextlib
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import time
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import unittest
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from datetime import date, datetime
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from django.core.exceptions import FieldError
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from django.db import connection, models
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from django.test import TestCase, override_settings
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from django.utils import timezone
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from .models import Article, Author, MySQLUnixTimestamp
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@contextlib.contextmanager
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def register_lookup(field, *lookups):
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try:
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for lookup in lookups:
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field.register_lookup(lookup)
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yield
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finally:
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for lookup in lookups:
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field._unregister_lookup(lookup)
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class Div3Lookup(models.Lookup):
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lookup_name = 'div3'
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def as_sql(self, compiler, connection):
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lhs, params = self.process_lhs(compiler, connection)
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rhs, rhs_params = self.process_rhs(compiler, connection)
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params.extend(rhs_params)
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return '(%s) %%%% 3 = %s' % (lhs, rhs), params
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def as_oracle(self, compiler, connection):
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lhs, params = self.process_lhs(compiler, connection)
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rhs, rhs_params = self.process_rhs(compiler, connection)
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params.extend(rhs_params)
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return 'mod(%s, 3) = %s' % (lhs, rhs), params
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class Div3Transform(models.Transform):
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lookup_name = 'div3'
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def as_sql(self, compiler, connection):
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lhs, lhs_params = compiler.compile(self.lhs)
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return '(%s) %%%% 3' % lhs, lhs_params
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def as_oracle(self, compiler, connection):
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lhs, lhs_params = compiler.compile(self.lhs)
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return 'mod(%s, 3)' % lhs, lhs_params
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class Div3BilateralTransform(Div3Transform):
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bilateral = True
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class Mult3BilateralTransform(models.Transform):
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bilateral = True
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lookup_name = 'mult3'
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def as_sql(self, compiler, connection):
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lhs, lhs_params = compiler.compile(self.lhs)
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return '3 * (%s)' % lhs, lhs_params
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class UpperBilateralTransform(models.Transform):
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bilateral = True
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lookup_name = 'upper'
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def as_sql(self, compiler, connection):
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lhs, lhs_params = compiler.compile(self.lhs)
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return 'UPPER(%s)' % lhs, lhs_params
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class YearTransform(models.Transform):
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# Use a name that avoids collision with the built-in year lookup.
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lookup_name = 'testyear'
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def as_sql(self, compiler, connection):
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lhs_sql, params = compiler.compile(self.lhs)
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return connection.ops.date_extract_sql('year', lhs_sql), params
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@property
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def output_field(self):
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return models.IntegerField()
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@YearTransform.register_lookup
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class YearExact(models.lookups.Lookup):
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lookup_name = 'exact'
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def as_sql(self, compiler, connection):
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# We will need to skip the extract part, and instead go
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# directly with the originating field, that is self.lhs.lhs
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lhs_sql, lhs_params = self.process_lhs(compiler, connection, self.lhs.lhs)
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rhs_sql, rhs_params = self.process_rhs(compiler, connection)
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# Note that we must be careful so that we have params in the
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# same order as we have the parts in the SQL.
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params = lhs_params + rhs_params + lhs_params + rhs_params
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# We use PostgreSQL specific SQL here. Note that we must do the
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# conversions in SQL instead of in Python to support F() references.
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return ("%(lhs)s >= (%(rhs)s || '-01-01')::date "
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"AND %(lhs)s <= (%(rhs)s || '-12-31')::date" %
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{'lhs': lhs_sql, 'rhs': rhs_sql}, params)
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@YearTransform.register_lookup
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class YearLte(models.lookups.LessThanOrEqual):
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"""
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The purpose of this lookup is to efficiently compare the year of the field.
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"""
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def as_sql(self, compiler, connection):
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# Skip the YearTransform above us (no possibility for efficient
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# lookup otherwise).
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real_lhs = self.lhs.lhs
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lhs_sql, params = self.process_lhs(compiler, connection, real_lhs)
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rhs_sql, rhs_params = self.process_rhs(compiler, connection)
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params.extend(rhs_params)
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# Build SQL where the integer year is concatenated with last month
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# and day, then convert that to date. (We try to have SQL like:
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# WHERE somecol <= '2013-12-31')
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# but also make it work if the rhs_sql is field reference.
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return "%s <= (%s || '-12-31')::date" % (lhs_sql, rhs_sql), params
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class Exactly(models.lookups.Exact):
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"""
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This lookup is used to test lookup registration.
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"""
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lookup_name = 'exactly'
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def get_rhs_op(self, connection, rhs):
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return connection.operators['exact'] % rhs
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class SQLFuncMixin(object):
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def as_sql(self, compiler, connection):
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return '%s()', [self.name]
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@property
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def output_field(self):
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return CustomField()
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class SQLFuncLookup(SQLFuncMixin, models.Lookup):
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def __init__(self, name, *args, **kwargs):
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super(SQLFuncLookup, self).__init__(*args, **kwargs)
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self.name = name
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class SQLFuncTransform(SQLFuncMixin, models.Transform):
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def __init__(self, name, *args, **kwargs):
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super(SQLFuncTransform, self).__init__(*args, **kwargs)
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self.name = name
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class SQLFuncFactory(object):
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def __init__(self, key, name):
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self.key = key
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self.name = name
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def __call__(self, *args, **kwargs):
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if self.key == 'lookupfunc':
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return SQLFuncLookup(self.name, *args, **kwargs)
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return SQLFuncTransform(self.name, *args, **kwargs)
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class CustomField(models.TextField):
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def get_lookup(self, lookup_name):
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if lookup_name.startswith('lookupfunc_'):
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key, name = lookup_name.split('_', 1)
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return SQLFuncFactory(key, name)
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return super(CustomField, self).get_lookup(lookup_name)
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def get_transform(self, lookup_name):
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if lookup_name.startswith('transformfunc_'):
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key, name = lookup_name.split('_', 1)
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return SQLFuncFactory(key, name)
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return super(CustomField, self).get_transform(lookup_name)
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class CustomModel(models.Model):
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field = CustomField()
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# We will register this class temporarily in the test method.
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class InMonth(models.lookups.Lookup):
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"""
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InMonth matches if the column's month is the same as value's month.
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"""
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lookup_name = 'inmonth'
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def as_sql(self, compiler, connection):
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lhs, lhs_params = self.process_lhs(compiler, connection)
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rhs, rhs_params = self.process_rhs(compiler, connection)
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# We need to be careful so that we get the params in right
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# places.
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params = lhs_params + rhs_params + lhs_params + rhs_params
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return ("%s >= date_trunc('month', %s) and "
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"%s < date_trunc('month', %s) + interval '1 months'" %
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(lhs, rhs, lhs, rhs), params)
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class DateTimeTransform(models.Transform):
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lookup_name = 'as_datetime'
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@property
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def output_field(self):
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return models.DateTimeField()
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def as_sql(self, compiler, connection):
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lhs, params = compiler.compile(self.lhs)
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return 'from_unixtime({})'.format(lhs), params
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class LookupTests(TestCase):
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def test_custom_name_lookup(self):
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a1 = Author.objects.create(name='a1', birthdate=date(1981, 2, 16))
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Author.objects.create(name='a2', birthdate=date(2012, 2, 29))
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custom_lookup_name = 'isactually'
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custom_transform_name = 'justtheyear'
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try:
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models.DateField.register_lookup(YearTransform)
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models.DateField.register_lookup(YearTransform, custom_transform_name)
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YearTransform.register_lookup(Exactly)
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YearTransform.register_lookup(Exactly, custom_lookup_name)
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qs1 = Author.objects.filter(birthdate__testyear__exactly=1981)
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qs2 = Author.objects.filter(birthdate__justtheyear__isactually=1981)
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self.assertSequenceEqual(qs1, [a1])
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self.assertSequenceEqual(qs2, [a1])
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finally:
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YearTransform._unregister_lookup(Exactly)
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YearTransform._unregister_lookup(Exactly, custom_lookup_name)
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models.DateField._unregister_lookup(YearTransform)
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models.DateField._unregister_lookup(YearTransform, custom_transform_name)
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def test_basic_lookup(self):
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a1 = Author.objects.create(name='a1', age=1)
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a2 = Author.objects.create(name='a2', age=2)
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a3 = Author.objects.create(name='a3', age=3)
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a4 = Author.objects.create(name='a4', age=4)
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with register_lookup(models.IntegerField, Div3Lookup):
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self.assertSequenceEqual(Author.objects.filter(age__div3=0), [a3])
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self.assertSequenceEqual(Author.objects.filter(age__div3=1).order_by('age'), [a1, a4])
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self.assertSequenceEqual(Author.objects.filter(age__div3=2), [a2])
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self.assertSequenceEqual(Author.objects.filter(age__div3=3), [])
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@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific SQL used")
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def test_birthdate_month(self):
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a1 = Author.objects.create(name='a1', birthdate=date(1981, 2, 16))
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a2 = Author.objects.create(name='a2', birthdate=date(2012, 2, 29))
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a3 = Author.objects.create(name='a3', birthdate=date(2012, 1, 31))
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a4 = Author.objects.create(name='a4', birthdate=date(2012, 3, 1))
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with register_lookup(models.DateField, InMonth):
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self.assertSequenceEqual(Author.objects.filter(birthdate__inmonth=date(2012, 1, 15)), [a3])
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self.assertSequenceEqual(Author.objects.filter(birthdate__inmonth=date(2012, 2, 1)), [a2])
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self.assertSequenceEqual(Author.objects.filter(birthdate__inmonth=date(1981, 2, 28)), [a1])
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self.assertSequenceEqual(Author.objects.filter(birthdate__inmonth=date(2012, 3, 12)), [a4])
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self.assertSequenceEqual(Author.objects.filter(birthdate__inmonth=date(2012, 4, 1)), [])
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def test_div3_extract(self):
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with register_lookup(models.IntegerField, Div3Transform):
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a1 = Author.objects.create(name='a1', age=1)
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a2 = Author.objects.create(name='a2', age=2)
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a3 = Author.objects.create(name='a3', age=3)
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a4 = Author.objects.create(name='a4', age=4)
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baseqs = Author.objects.order_by('name')
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self.assertSequenceEqual(baseqs.filter(age__div3=2), [a2])
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self.assertSequenceEqual(baseqs.filter(age__div3__lte=3), [a1, a2, a3, a4])
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self.assertSequenceEqual(baseqs.filter(age__div3__in=[0, 2]), [a2, a3])
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self.assertSequenceEqual(baseqs.filter(age__div3__in=[2, 4]), [a2])
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self.assertSequenceEqual(baseqs.filter(age__div3__gte=3), [])
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self.assertSequenceEqual(baseqs.filter(age__div3__range=(1, 2)), [a1, a2, a4])
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def test_foreignobject_lookup_registration(self):
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field = Article._meta.get_field('author')
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with register_lookup(models.ForeignObject, Exactly):
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self.assertIs(field.get_lookup('exactly'), Exactly)
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# ForeignObject should ignore regular Field lookups
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with register_lookup(models.Field, Exactly):
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self.assertIsNone(field.get_lookup('exactly'))
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def test_lookups_caching(self):
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field = Article._meta.get_field('author')
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# clear and re-cache
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field.get_lookups.cache_clear()
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self.assertNotIn('exactly', field.get_lookups())
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# registration should bust the cache
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with register_lookup(models.ForeignObject, Exactly):
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# getting the lookups again should re-cache
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self.assertIn('exactly', field.get_lookups())
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class BilateralTransformTests(TestCase):
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def test_bilateral_upper(self):
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with register_lookup(models.CharField, UpperBilateralTransform):
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Author.objects.bulk_create([
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Author(name='Doe'),
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Author(name='doe'),
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Author(name='Foo'),
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])
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self.assertQuerysetEqual(
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Author.objects.filter(name__upper='doe'),
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["<Author: Doe>", "<Author: doe>"], ordered=False)
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self.assertQuerysetEqual(
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Author.objects.filter(name__upper__contains='f'),
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["<Author: Foo>"], ordered=False)
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def test_bilateral_inner_qs(self):
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with register_lookup(models.CharField, UpperBilateralTransform):
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with self.assertRaises(NotImplementedError):
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Author.objects.filter(name__upper__in=Author.objects.values_list('name'))
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def test_bilateral_multi_value(self):
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with register_lookup(models.CharField, UpperBilateralTransform):
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Author.objects.bulk_create([
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Author(name='Foo'),
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Author(name='Bar'),
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Author(name='Ray'),
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])
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self.assertQuerysetEqual(
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Author.objects.filter(name__upper__in=['foo', 'bar', 'doe']).order_by('name'),
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['Bar', 'Foo'],
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lambda a: a.name
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)
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def test_div3_bilateral_extract(self):
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with register_lookup(models.IntegerField, Div3BilateralTransform):
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a1 = Author.objects.create(name='a1', age=1)
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a2 = Author.objects.create(name='a2', age=2)
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a3 = Author.objects.create(name='a3', age=3)
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a4 = Author.objects.create(name='a4', age=4)
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baseqs = Author.objects.order_by('name')
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self.assertSequenceEqual(baseqs.filter(age__div3=2), [a2])
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self.assertSequenceEqual(baseqs.filter(age__div3__lte=3), [a3])
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self.assertSequenceEqual(baseqs.filter(age__div3__in=[0, 2]), [a2, a3])
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self.assertSequenceEqual(baseqs.filter(age__div3__in=[2, 4]), [a1, a2, a4])
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self.assertSequenceEqual(baseqs.filter(age__div3__gte=3), [a1, a2, a3, a4])
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self.assertSequenceEqual(baseqs.filter(age__div3__range=(1, 2)), [a1, a2, a4])
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def test_bilateral_order(self):
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with register_lookup(models.IntegerField, Mult3BilateralTransform, Div3BilateralTransform):
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a1 = Author.objects.create(name='a1', age=1)
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a2 = Author.objects.create(name='a2', age=2)
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a3 = Author.objects.create(name='a3', age=3)
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a4 = Author.objects.create(name='a4', age=4)
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baseqs = Author.objects.order_by('name')
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# mult3__div3 always leads to 0
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self.assertSequenceEqual(baseqs.filter(age__mult3__div3=42), [a1, a2, a3, a4])
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self.assertSequenceEqual(baseqs.filter(age__div3__mult3=42), [a3])
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def test_bilateral_fexpr(self):
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with register_lookup(models.IntegerField, Mult3BilateralTransform):
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a1 = Author.objects.create(name='a1', age=1, average_rating=3.2)
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a2 = Author.objects.create(name='a2', age=2, average_rating=0.5)
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a3 = Author.objects.create(name='a3', age=3, average_rating=1.5)
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a4 = Author.objects.create(name='a4', age=4)
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baseqs = Author.objects.order_by('name')
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self.assertSequenceEqual(baseqs.filter(age__mult3=models.F('age')), [a1, a2, a3, a4])
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# Same as age >= average_rating
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self.assertSequenceEqual(baseqs.filter(age__mult3__gte=models.F('average_rating')), [a2, a3])
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@override_settings(USE_TZ=True)
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class DateTimeLookupTests(TestCase):
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@unittest.skipUnless(connection.vendor == 'mysql', "MySQL specific SQL used")
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def test_datetime_output_field(self):
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with register_lookup(models.PositiveIntegerField, DateTimeTransform):
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ut = MySQLUnixTimestamp.objects.create(timestamp=time.time())
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y2k = timezone.make_aware(datetime(2000, 1, 1))
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self.assertSequenceEqual(MySQLUnixTimestamp.objects.filter(timestamp__as_datetime__gt=y2k), [ut])
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class YearLteTests(TestCase):
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def setUp(self):
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models.DateField.register_lookup(YearTransform)
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self.a1 = Author.objects.create(name='a1', birthdate=date(1981, 2, 16))
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self.a2 = Author.objects.create(name='a2', birthdate=date(2012, 2, 29))
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self.a3 = Author.objects.create(name='a3', birthdate=date(2012, 1, 31))
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self.a4 = Author.objects.create(name='a4', birthdate=date(2012, 3, 1))
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def tearDown(self):
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models.DateField._unregister_lookup(YearTransform)
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@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific SQL used")
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def test_year_lte(self):
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baseqs = Author.objects.order_by('name')
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lte=2012), [self.a1, self.a2, self.a3, self.a4])
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear=2012), [self.a2, self.a3, self.a4])
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self.assertNotIn('BETWEEN', str(baseqs.filter(birthdate__testyear=2012).query))
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lte=2011), [self.a1])
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# The non-optimized version works, too.
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lt=2012), [self.a1])
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@unittest.skipUnless(connection.vendor == 'postgresql', "PostgreSQL specific SQL used")
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def test_year_lte_fexpr(self):
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self.a2.age = 2011
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self.a2.save()
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self.a3.age = 2012
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self.a3.save()
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self.a4.age = 2013
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self.a4.save()
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baseqs = Author.objects.order_by('name')
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lte=models.F('age')), [self.a3, self.a4])
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self.assertSequenceEqual(baseqs.filter(birthdate__testyear__lt=models.F('age')), [self.a4])
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def test_year_lte_sql(self):
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# This test will just check the generated SQL for __lte. This
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# doesn't require running on PostgreSQL and spots the most likely
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# error - not running YearLte SQL at all.
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baseqs = Author.objects.order_by('name')
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self.assertIn(
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'<= (2011 || ', str(baseqs.filter(birthdate__testyear__lte=2011).query))
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self.assertIn(
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'-12-31', str(baseqs.filter(birthdate__testyear__lte=2011).query))
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def test_postgres_year_exact(self):
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baseqs = Author.objects.order_by('name')
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self.assertIn(
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'= (2011 || ', str(baseqs.filter(birthdate__testyear=2011).query))
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self.assertIn(
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'-12-31', str(baseqs.filter(birthdate__testyear=2011).query))
|
|
|
|
def test_custom_implementation_year_exact(self):
|
|
try:
|
|
# Two ways to add a customized implementation for different backends:
|
|
# First is MonkeyPatch of the class.
|
|
def as_custom_sql(self, compiler, connection):
|
|
lhs_sql, lhs_params = self.process_lhs(compiler, connection, self.lhs.lhs)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
return ("%(lhs)s >= str_to_date(concat(%(rhs)s, '-01-01'), '%%%%Y-%%%%m-%%%%d') "
|
|
"AND %(lhs)s <= str_to_date(concat(%(rhs)s, '-12-31'), '%%%%Y-%%%%m-%%%%d')" %
|
|
{'lhs': lhs_sql, 'rhs': rhs_sql}, params)
|
|
setattr(YearExact, 'as_' + connection.vendor, as_custom_sql)
|
|
self.assertIn(
|
|
'concat(',
|
|
str(Author.objects.filter(birthdate__testyear=2012).query))
|
|
finally:
|
|
delattr(YearExact, 'as_' + connection.vendor)
|
|
try:
|
|
# The other way is to subclass the original lookup and register the subclassed
|
|
# lookup instead of the original.
|
|
class CustomYearExact(YearExact):
|
|
# This method should be named "as_mysql" for MySQL, "as_postgresql" for postgres
|
|
# and so on, but as we don't know which DB we are running on, we need to use
|
|
# setattr.
|
|
def as_custom_sql(self, compiler, connection):
|
|
lhs_sql, lhs_params = self.process_lhs(compiler, connection, self.lhs.lhs)
|
|
rhs_sql, rhs_params = self.process_rhs(compiler, connection)
|
|
params = lhs_params + rhs_params + lhs_params + rhs_params
|
|
return ("%(lhs)s >= str_to_date(CONCAT(%(rhs)s, '-01-01'), '%%%%Y-%%%%m-%%%%d') "
|
|
"AND %(lhs)s <= str_to_date(CONCAT(%(rhs)s, '-12-31'), '%%%%Y-%%%%m-%%%%d')" %
|
|
{'lhs': lhs_sql, 'rhs': rhs_sql}, params)
|
|
setattr(CustomYearExact, 'as_' + connection.vendor, CustomYearExact.as_custom_sql)
|
|
YearTransform.register_lookup(CustomYearExact)
|
|
self.assertIn(
|
|
'CONCAT(',
|
|
str(Author.objects.filter(birthdate__testyear=2012).query))
|
|
finally:
|
|
YearTransform._unregister_lookup(CustomYearExact)
|
|
YearTransform.register_lookup(YearExact)
|
|
|
|
|
|
class TrackCallsYearTransform(YearTransform):
|
|
# Use a name that avoids collision with the built-in year lookup.
|
|
lookup_name = 'testyear'
|
|
call_order = []
|
|
|
|
def as_sql(self, compiler, connection):
|
|
lhs_sql, params = compiler.compile(self.lhs)
|
|
return connection.ops.date_extract_sql('year', lhs_sql), params
|
|
|
|
@property
|
|
def output_field(self):
|
|
return models.IntegerField()
|
|
|
|
def get_lookup(self, lookup_name):
|
|
self.call_order.append('lookup')
|
|
return super(TrackCallsYearTransform, self).get_lookup(lookup_name)
|
|
|
|
def get_transform(self, lookup_name):
|
|
self.call_order.append('transform')
|
|
return super(TrackCallsYearTransform, self).get_transform(lookup_name)
|
|
|
|
|
|
class LookupTransformCallOrderTests(TestCase):
|
|
def test_call_order(self):
|
|
with register_lookup(models.DateField, TrackCallsYearTransform):
|
|
# junk lookup - tries lookup, then transform, then fails
|
|
with self.assertRaises(FieldError):
|
|
Author.objects.filter(birthdate__testyear__junk=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order,
|
|
['lookup', 'transform'])
|
|
TrackCallsYearTransform.call_order = []
|
|
# junk transform - tries transform only, then fails
|
|
with self.assertRaises(FieldError):
|
|
Author.objects.filter(birthdate__testyear__junk__more_junk=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order,
|
|
['transform'])
|
|
TrackCallsYearTransform.call_order = []
|
|
# Just getting the year (implied __exact) - lookup only
|
|
Author.objects.filter(birthdate__testyear=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order,
|
|
['lookup'])
|
|
TrackCallsYearTransform.call_order = []
|
|
# Just getting the year (explicit __exact) - lookup only
|
|
Author.objects.filter(birthdate__testyear__exact=2012)
|
|
self.assertEqual(TrackCallsYearTransform.call_order,
|
|
['lookup'])
|
|
|
|
|
|
class CustomisedMethodsTests(TestCase):
|
|
|
|
def test_overridden_get_lookup(self):
|
|
q = CustomModel.objects.filter(field__lookupfunc_monkeys=3)
|
|
self.assertIn('monkeys()', str(q.query))
|
|
|
|
def test_overridden_get_transform(self):
|
|
q = CustomModel.objects.filter(field__transformfunc_banana=3)
|
|
self.assertIn('banana()', str(q.query))
|
|
|
|
def test_overridden_get_lookup_chain(self):
|
|
q = CustomModel.objects.filter(field__transformfunc_banana__lookupfunc_elephants=3)
|
|
self.assertIn('elephants()', str(q.query))
|
|
|
|
def test_overridden_get_transform_chain(self):
|
|
q = CustomModel.objects.filter(field__transformfunc_banana__transformfunc_pear=3)
|
|
self.assertIn('pear()', str(q.query))
|
|
|
|
|
|
class SubqueryTransformTests(TestCase):
|
|
def test_subquery_usage(self):
|
|
with register_lookup(models.IntegerField, Div3Transform):
|
|
Author.objects.create(name='a1', age=1)
|
|
a2 = Author.objects.create(name='a2', age=2)
|
|
Author.objects.create(name='a3', age=3)
|
|
Author.objects.create(name='a4', age=4)
|
|
qs = Author.objects.order_by('name').filter(id__in=Author.objects.filter(age__div3=2))
|
|
self.assertSequenceEqual(qs, [a2])
|