399 lines
19 KiB
Python
399 lines
19 KiB
Python
import re
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from io import StringIO
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from unittest import mock, skipUnless
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from django.core.management import call_command
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from django.db import connection
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from django.db.backends.base.introspection import TableInfo
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from django.test import TestCase, TransactionTestCase, skipUnlessDBFeature
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from .models import PeopleMoreData
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def inspectdb_tables_only(table_name):
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"""
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Limit introspection to tables created for models of this app.
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Some databases such as Oracle are extremely slow at introspection.
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"""
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return table_name.startswith('inspectdb_')
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def special_table_only(table_name):
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return table_name.startswith('inspectdb_special')
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class InspectDBTestCase(TestCase):
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unique_re = re.compile(r'.*unique_together = \((.+),\).*')
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def test_stealth_table_name_filter_option(self):
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out = StringIO()
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, stdout=out)
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error_message = "inspectdb has examined a table that should have been filtered out."
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# contrib.contenttypes is one of the apps always installed when running
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# the Django test suite, check that one of its tables hasn't been
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# inspected
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self.assertNotIn("class DjangoContentType(models.Model):", out.getvalue(), msg=error_message)
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def test_table_option(self):
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"""
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inspectdb can inspect a subset of tables by passing the table names as
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arguments.
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"""
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out = StringIO()
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call_command('inspectdb', 'inspectdb_people', stdout=out)
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output = out.getvalue()
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self.assertIn('class InspectdbPeople(models.Model):', output)
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self.assertNotIn("InspectdbPeopledata", output)
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def make_field_type_asserter(self):
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"""Call inspectdb and return a function to validate a field type in its output"""
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out = StringIO()
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call_command('inspectdb', 'inspectdb_columntypes', stdout=out)
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output = out.getvalue()
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def assertFieldType(name, definition):
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out_def = re.search(r'^\s*%s = (models.*)$' % name, output, re.MULTILINE).groups()[0]
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self.assertEqual(definition, out_def)
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return assertFieldType
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def test_field_types(self):
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"""Test introspection of various Django field types"""
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assertFieldType = self.make_field_type_asserter()
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# Inspecting Oracle DB doesn't produce correct results (#19884):
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# - it reports fields as blank=True when they aren't.
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if not connection.features.interprets_empty_strings_as_nulls:
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assertFieldType('char_field', "models.CharField(max_length=10)")
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assertFieldType('null_char_field', "models.CharField(max_length=10, blank=True, null=True)")
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assertFieldType('email_field', "models.CharField(max_length=254)")
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assertFieldType('file_field', "models.CharField(max_length=100)")
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assertFieldType('file_path_field', "models.CharField(max_length=100)")
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assertFieldType('slug_field', "models.CharField(max_length=50)")
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assertFieldType('text_field', "models.TextField()")
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assertFieldType('url_field', "models.CharField(max_length=200)")
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assertFieldType('date_field', "models.DateField()")
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assertFieldType('date_time_field', "models.DateTimeField()")
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if connection.features.can_introspect_ip_address_field:
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assertFieldType('gen_ip_address_field', "models.GenericIPAddressField()")
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elif not connection.features.interprets_empty_strings_as_nulls:
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assertFieldType('gen_ip_address_field', "models.CharField(max_length=39)")
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if connection.features.can_introspect_time_field:
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assertFieldType('time_field', "models.TimeField()")
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if connection.features.has_native_uuid_field:
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assertFieldType('uuid_field', "models.UUIDField()")
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elif not connection.features.interprets_empty_strings_as_nulls:
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assertFieldType('uuid_field', "models.CharField(max_length=32)")
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def test_number_field_types(self):
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"""Test introspection of various Django field types"""
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assertFieldType = self.make_field_type_asserter()
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if not connection.features.can_introspect_autofield:
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assertFieldType('id', "models.IntegerField(primary_key=True) # AutoField?")
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if connection.features.can_introspect_big_integer_field:
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assertFieldType('big_int_field', "models.BigIntegerField()")
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else:
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assertFieldType('big_int_field', "models.IntegerField()")
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bool_field_type = connection.features.introspected_boolean_field_type
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assertFieldType('bool_field', "models.{}()".format(bool_field_type))
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assertFieldType('null_bool_field', 'models.{}(blank=True, null=True)'.format(bool_field_type))
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if connection.features.can_introspect_decimal_field:
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assertFieldType('decimal_field', "models.DecimalField(max_digits=6, decimal_places=1)")
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else: # Guessed arguments on SQLite, see #5014
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assertFieldType('decimal_field', "models.DecimalField(max_digits=10, decimal_places=5) "
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"# max_digits and decimal_places have been guessed, "
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"as this database handles decimal fields as float")
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assertFieldType('float_field', "models.FloatField()")
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assertFieldType('int_field', "models.IntegerField()")
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if connection.features.can_introspect_positive_integer_field:
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assertFieldType('pos_int_field', "models.PositiveIntegerField()")
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else:
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assertFieldType('pos_int_field', "models.IntegerField()")
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if connection.features.can_introspect_positive_integer_field:
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if connection.features.can_introspect_small_integer_field:
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assertFieldType('pos_small_int_field', "models.PositiveSmallIntegerField()")
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else:
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assertFieldType('pos_small_int_field', "models.PositiveIntegerField()")
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else:
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if connection.features.can_introspect_small_integer_field:
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assertFieldType('pos_small_int_field', "models.SmallIntegerField()")
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else:
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assertFieldType('pos_small_int_field', "models.IntegerField()")
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if connection.features.can_introspect_small_integer_field:
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assertFieldType('small_int_field', "models.SmallIntegerField()")
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else:
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assertFieldType('small_int_field', "models.IntegerField()")
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@skipUnlessDBFeature('can_introspect_foreign_keys')
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def test_attribute_name_not_python_keyword(self):
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out = StringIO()
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, stdout=out)
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output = out.getvalue()
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error_message = "inspectdb generated an attribute name which is a Python keyword"
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# Recursive foreign keys should be set to 'self'
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self.assertIn("parent = models.ForeignKey('self', models.DO_NOTHING)", output)
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self.assertNotIn(
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"from = models.ForeignKey(InspectdbPeople, models.DO_NOTHING)",
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output,
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msg=error_message,
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)
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# As InspectdbPeople model is defined after InspectdbMessage, it should be quoted
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self.assertIn(
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"from_field = models.ForeignKey('InspectdbPeople', models.DO_NOTHING, db_column='from_id')",
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output,
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)
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self.assertIn(
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"people_pk = models.ForeignKey(InspectdbPeople, models.DO_NOTHING, primary_key=True)",
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output,
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)
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self.assertIn(
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"people_unique = models.ForeignKey(InspectdbPeople, models.DO_NOTHING, unique=True)",
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output,
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)
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def test_digits_column_name_introspection(self):
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"""Introspection of column names consist/start with digits (#16536/#17676)"""
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out = StringIO()
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call_command('inspectdb', 'inspectdb_digitsincolumnname', stdout=out)
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output = out.getvalue()
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error_message = "inspectdb generated a model field name which is a number"
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self.assertNotIn(" 123 = models.CharField", output, msg=error_message)
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self.assertIn("number_123 = models.CharField", output)
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error_message = "inspectdb generated a model field name which starts with a digit"
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self.assertNotIn(" 4extra = models.CharField", output, msg=error_message)
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self.assertIn("number_4extra = models.CharField", output)
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self.assertNotIn(" 45extra = models.CharField", output, msg=error_message)
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self.assertIn("number_45extra = models.CharField", output)
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def test_special_column_name_introspection(self):
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"""
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Introspection of column names containing special characters,
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unsuitable for Python identifiers
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"""
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out = StringIO()
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call_command('inspectdb', table_name_filter=special_table_only, stdout=out)
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output = out.getvalue()
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base_name = connection.introspection.identifier_converter('Field')
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self.assertIn("field = models.IntegerField()", output)
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self.assertIn("field_field = models.IntegerField(db_column='%s_')" % base_name, output)
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self.assertIn("field_field_0 = models.IntegerField(db_column='%s__')" % base_name, output)
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self.assertIn("field_field_1 = models.IntegerField(db_column='__field')", output)
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self.assertIn("prc_x = models.IntegerField(db_column='prc(%) x')", output)
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self.assertIn("tamaño = models.IntegerField()", output)
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def test_table_name_introspection(self):
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"""
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Introspection of table names containing special characters,
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unsuitable for Python identifiers
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"""
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out = StringIO()
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call_command('inspectdb', table_name_filter=special_table_only, stdout=out)
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output = out.getvalue()
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self.assertIn("class InspectdbSpecialTableName(models.Model):", output)
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def test_managed_models(self):
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"""By default the command generates models with `Meta.managed = False` (#14305)"""
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out = StringIO()
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call_command('inspectdb', 'inspectdb_columntypes', stdout=out)
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output = out.getvalue()
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self.longMessage = False
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self.assertIn(" managed = False", output, msg='inspectdb should generate unmanaged models.')
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def test_unique_together_meta(self):
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out = StringIO()
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call_command('inspectdb', 'inspectdb_uniquetogether', stdout=out)
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output = out.getvalue()
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self.assertIn(" unique_together = (('", output)
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unique_together_match = re.findall(self.unique_re, output)
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# There should be one unique_together tuple.
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self.assertEqual(len(unique_together_match), 1)
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fields = unique_together_match[0]
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# Fields with db_column = field name.
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self.assertIn("('field1', 'field2')", fields)
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# Fields from columns whose names are Python keywords.
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self.assertIn("('field1', 'field2')", fields)
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# Fields whose names normalize to the same Python field name and hence
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# are given an integer suffix.
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self.assertIn("('non_unique_column', 'non_unique_column_0')", fields)
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@skipUnless(connection.vendor == 'postgresql', 'PostgreSQL specific SQL')
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def test_unsupported_unique_together(self):
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"""Unsupported index types (COALESCE here) are skipped."""
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with connection.cursor() as c:
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c.execute(
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'CREATE UNIQUE INDEX Findex ON %s '
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'(id, people_unique_id, COALESCE(message_id, -1))' % PeopleMoreData._meta.db_table
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)
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try:
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out = StringIO()
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call_command(
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'inspectdb',
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table_name_filter=lambda tn: tn.startswith(PeopleMoreData._meta.db_table),
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stdout=out,
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)
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output = out.getvalue()
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self.assertIn('# A unique constraint could not be introspected.', output)
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self.assertEqual(re.findall(self.unique_re, output), ["('id', 'people_unique')"])
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finally:
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with connection.cursor() as c:
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c.execute('DROP INDEX Findex')
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@skipUnless(connection.vendor == 'sqlite',
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"Only patched sqlite's DatabaseIntrospection.data_types_reverse for this test")
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def test_custom_fields(self):
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"""
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Introspection of columns with a custom field (#21090)
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"""
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out = StringIO()
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orig_data_types_reverse = connection.introspection.data_types_reverse
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try:
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connection.introspection.data_types_reverse = {
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'text': 'myfields.TextField',
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'bigint': 'BigIntegerField',
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}
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call_command('inspectdb', 'inspectdb_columntypes', stdout=out)
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output = out.getvalue()
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self.assertIn("text_field = myfields.TextField()", output)
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self.assertIn("big_int_field = models.BigIntegerField()", output)
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finally:
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connection.introspection.data_types_reverse = orig_data_types_reverse
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def test_introspection_errors(self):
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"""
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Introspection errors should not crash the command, and the error should
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be visible in the output.
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"""
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out = StringIO()
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with mock.patch('django.db.connection.introspection.get_table_list',
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return_value=[TableInfo(name='nonexistent', type='t')]):
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call_command('inspectdb', stdout=out)
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output = out.getvalue()
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self.assertIn("# Unable to inspect table 'nonexistent'", output)
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# The error message depends on the backend
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self.assertIn("# The error was:", output)
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class InspectDBTransactionalTests(TransactionTestCase):
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available_apps = None
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def test_include_views(self):
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"""inspectdb --include-views creates models for database views."""
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with connection.cursor() as cursor:
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cursor.execute(
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'CREATE VIEW inspectdb_people_view AS '
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'SELECT id, name FROM inspectdb_people'
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)
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out = StringIO()
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view_model = 'class InspectdbPeopleView(models.Model):'
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view_managed = 'managed = False # Created from a view.'
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try:
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, stdout=out)
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no_views_output = out.getvalue()
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self.assertNotIn(view_model, no_views_output)
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self.assertNotIn(view_managed, no_views_output)
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, include_views=True, stdout=out)
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with_views_output = out.getvalue()
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self.assertIn(view_model, with_views_output)
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self.assertIn(view_managed, with_views_output)
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finally:
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with connection.cursor() as cursor:
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cursor.execute('DROP VIEW inspectdb_people_view')
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@skipUnlessDBFeature('can_introspect_materialized_views')
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def test_include_materialized_views(self):
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"""inspectdb --include-views creates models for materialized views."""
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with connection.cursor() as cursor:
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cursor.execute(
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'CREATE MATERIALIZED VIEW inspectdb_people_materialized AS '
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'SELECT id, name FROM inspectdb_people'
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)
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out = StringIO()
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view_model = 'class InspectdbPeopleMaterialized(models.Model):'
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view_managed = 'managed = False # Created from a view.'
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try:
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, stdout=out)
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no_views_output = out.getvalue()
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self.assertNotIn(view_model, no_views_output)
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self.assertNotIn(view_managed, no_views_output)
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, include_views=True, stdout=out)
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with_views_output = out.getvalue()
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self.assertIn(view_model, with_views_output)
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self.assertIn(view_managed, with_views_output)
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finally:
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with connection.cursor() as cursor:
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cursor.execute('DROP MATERIALIZED VIEW inspectdb_people_materialized')
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@skipUnless(connection.vendor == 'postgresql', 'PostgreSQL specific SQL')
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@skipUnlessDBFeature('supports_table_partitions')
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def test_include_partitions(self):
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"""inspectdb --include-partitions creates models for partitions."""
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with connection.cursor() as cursor:
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cursor.execute('''\
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CREATE TABLE inspectdb_partition_parent (name text not null)
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PARTITION BY LIST (left(upper(name), 1))
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''')
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cursor.execute('''\
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CREATE TABLE inspectdb_partition_child
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PARTITION OF inspectdb_partition_parent
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FOR VALUES IN ('A', 'B', 'C')
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''')
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out = StringIO()
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partition_model_parent = 'class InspectdbPartitionParent(models.Model):'
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partition_model_child = 'class InspectdbPartitionChild(models.Model):'
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partition_managed = 'managed = False # Created from a partition.'
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try:
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, stdout=out)
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no_partitions_output = out.getvalue()
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self.assertIn(partition_model_parent, no_partitions_output)
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self.assertNotIn(partition_model_child, no_partitions_output)
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self.assertNotIn(partition_managed, no_partitions_output)
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call_command('inspectdb', table_name_filter=inspectdb_tables_only, include_partitions=True, stdout=out)
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with_partitions_output = out.getvalue()
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self.assertIn(partition_model_parent, with_partitions_output)
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self.assertIn(partition_model_child, with_partitions_output)
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self.assertIn(partition_managed, with_partitions_output)
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finally:
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with connection.cursor() as cursor:
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cursor.execute('DROP TABLE IF EXISTS inspectdb_partition_child')
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cursor.execute('DROP TABLE IF EXISTS inspectdb_partition_parent')
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@skipUnless(connection.vendor == 'postgresql', 'PostgreSQL specific SQL')
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def test_foreign_data_wrapper(self):
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with connection.cursor() as cursor:
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cursor.execute('CREATE EXTENSION IF NOT EXISTS file_fdw')
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cursor.execute('CREATE SERVER inspectdb_server FOREIGN DATA WRAPPER file_fdw')
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cursor.execute('''\
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CREATE FOREIGN TABLE inspectdb_iris_foreign_table (
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petal_length real,
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petal_width real,
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sepal_length real,
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sepal_width real
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) SERVER inspectdb_server OPTIONS (
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filename '/dev/null'
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)
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''')
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out = StringIO()
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foreign_table_model = 'class InspectdbIrisForeignTable(models.Model):'
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foreign_table_managed = 'managed = False'
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try:
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call_command('inspectdb', stdout=out)
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output = out.getvalue()
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self.assertIn(foreign_table_model, output)
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self.assertIn(foreign_table_managed, output)
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finally:
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with connection.cursor() as cursor:
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cursor.execute('DROP FOREIGN TABLE IF EXISTS inspectdb_iris_foreign_table')
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cursor.execute('DROP SERVER IF EXISTS inspectdb_server')
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cursor.execute('DROP EXTENSION IF EXISTS file_fdw')
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