mirror of https://github.com/django/django.git
588 lines
24 KiB
Python
588 lines
24 KiB
Python
import os
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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, test_collation
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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 inspectdb_views_only(table_name):
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return table_name.startswith("inspectdb_") and table_name.endswith(
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("_materialized", "_view")
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)
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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 = (
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"inspectdb has examined a table that should have been filtered out."
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)
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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(
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"class DjangoContentType(models.Model):", out.getvalue(), msg=error_message
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)
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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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"""
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Call inspectdb and return a function to validate a field type in its
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output.
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"""
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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)[1]
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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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introspected_field_types = connection.features.introspected_field_types
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char_field_type = introspected_field_types["CharField"]
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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 (
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not connection.features.interprets_empty_strings_as_nulls
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and char_field_type == "CharField"
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):
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assertFieldType("char_field", "models.CharField(max_length=10)")
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assertFieldType(
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"null_char_field",
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"models.CharField(max_length=10, blank=True, null=True)",
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)
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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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if char_field_type == "TextField":
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assertFieldType("char_field", "models.TextField()")
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assertFieldType(
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"null_char_field", "models.TextField(blank=True, null=True)"
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)
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assertFieldType("email_field", "models.TextField()")
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assertFieldType("file_field", "models.TextField()")
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assertFieldType("file_path_field", "models.TextField()")
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assertFieldType("slug_field", "models.TextField()")
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assertFieldType("text_field", "models.TextField()")
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assertFieldType("url_field", "models.TextField()")
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assertFieldType("date_field", "models.DateField()")
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assertFieldType("date_time_field", "models.DateTimeField()")
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if introspected_field_types["GenericIPAddressField"] == "GenericIPAddressField":
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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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assertFieldType(
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"time_field", "models.%s()" % introspected_field_types["TimeField"]
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)
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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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@skipUnlessDBFeature("can_introspect_json_field", "supports_json_field")
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def test_json_field(self):
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out = StringIO()
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call_command("inspectdb", "inspectdb_jsonfieldcolumntype", stdout=out)
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output = out.getvalue()
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if not connection.features.interprets_empty_strings_as_nulls:
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self.assertIn("json_field = models.JSONField()", output)
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self.assertIn(
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"null_json_field = models.JSONField(blank=True, null=True)", output
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)
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@skipUnlessDBFeature("supports_collation_on_charfield")
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@skipUnless(test_collation, "Language collations are not supported.")
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def test_char_field_db_collation(self):
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out = StringIO()
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call_command("inspectdb", "inspectdb_charfielddbcollation", stdout=out)
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output = out.getvalue()
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if not connection.features.interprets_empty_strings_as_nulls:
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self.assertIn(
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"char_field = models.CharField(max_length=10, "
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"db_collation='%s')" % test_collation,
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output,
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)
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else:
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self.assertIn(
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"char_field = models.CharField(max_length=10, "
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"db_collation='%s', blank=True, null=True)" % test_collation,
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output,
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)
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@skipUnlessDBFeature("supports_collation_on_textfield")
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@skipUnless(test_collation, "Language collations are not supported.")
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def test_text_field_db_collation(self):
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out = StringIO()
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call_command("inspectdb", "inspectdb_textfielddbcollation", stdout=out)
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output = out.getvalue()
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if not connection.features.interprets_empty_strings_as_nulls:
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self.assertIn(
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"text_field = models.TextField(db_collation='%s')" % test_collation,
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output,
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)
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else:
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self.assertIn(
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"text_field = models.TextField(db_collation='%s, blank=True, "
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"null=True)" % test_collation,
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output,
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)
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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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introspected_field_types = connection.features.introspected_field_types
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auto_field_type = connection.features.introspected_field_types["AutoField"]
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if auto_field_type != "AutoField":
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assertFieldType(
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"id", "models.%s(primary_key=True) # AutoField?" % auto_field_type
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)
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assertFieldType(
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"big_int_field", "models.%s()" % introspected_field_types["BigIntegerField"]
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)
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bool_field_type = introspected_field_types["BooleanField"]
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assertFieldType("bool_field", "models.{}()".format(bool_field_type))
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assertFieldType(
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"null_bool_field",
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"models.{}(blank=True, null=True)".format(bool_field_type),
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)
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if connection.vendor != "sqlite":
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assertFieldType(
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"decimal_field", "models.DecimalField(max_digits=6, decimal_places=1)"
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)
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else: # Guessed arguments on SQLite, see #5014
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assertFieldType(
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"decimal_field",
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"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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)
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assertFieldType("float_field", "models.FloatField()")
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assertFieldType(
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"int_field", "models.%s()" % introspected_field_types["IntegerField"]
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)
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assertFieldType(
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"pos_int_field",
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"models.%s()" % introspected_field_types["PositiveIntegerField"],
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)
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assertFieldType(
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"pos_big_int_field",
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"models.%s()" % introspected_field_types["PositiveBigIntegerField"],
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)
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assertFieldType(
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"pos_small_int_field",
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"models.%s()" % introspected_field_types["PositiveSmallIntegerField"],
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)
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assertFieldType(
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"small_int_field",
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"models.%s()" % introspected_field_types["SmallIntegerField"],
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)
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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 = (
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"inspectdb generated an attribute name which is a Python keyword"
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)
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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
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# be quoted.
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self.assertIn(
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"from_field = models.ForeignKey('InspectdbPeople', models.DO_NOTHING, "
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"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.OneToOneField(InspectdbPeople, models.DO_NOTHING, "
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"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.OneToOneField(InspectdbPeople, models.DO_NOTHING)",
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output,
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)
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@skipUnlessDBFeature("can_introspect_foreign_keys")
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def test_foreign_key_to_field(self):
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out = StringIO()
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call_command("inspectdb", "inspectdb_foreignkeytofield", stdout=out)
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self.assertIn(
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"to_field_fk = models.ForeignKey('InspectdbPeoplemoredata', "
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"models.DO_NOTHING, to_field='people_unique_id')",
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out.getvalue(),
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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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char_field_type = connection.features.introspected_field_types["CharField"]
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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(
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" 123 = models.%s" % char_field_type, output, msg=error_message
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)
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self.assertIn("number_123 = models.%s" % char_field_type, output)
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error_message = (
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"inspectdb generated a model field name which starts with a digit"
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)
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self.assertNotIn(
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" 4extra = models.%s" % char_field_type, output, msg=error_message
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)
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self.assertIn("number_4extra = models.%s" % char_field_type, output)
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self.assertNotIn(
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" 45extra = models.%s" % char_field_type, output, msg=error_message
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)
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self.assertIn("number_45extra = models.%s" % char_field_type, 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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integer_field_type = connection.features.introspected_field_types[
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"IntegerField"
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]
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self.assertIn("field = models.%s()" % integer_field_type, output)
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self.assertIn(
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"field_field = models.%s(db_column='%s_')"
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% (integer_field_type, base_name),
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output,
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)
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self.assertIn(
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"field_field_0 = models.%s(db_column='%s__')"
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% (integer_field_type, base_name),
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output,
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)
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self.assertIn(
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"field_field_1 = models.%s(db_column='__field')" % integer_field_type,
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output,
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)
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self.assertIn(
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"prc_x = models.{}(db_column='prc(%) x')".format(integer_field_type), output
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)
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self.assertIn("tamaño = models.%s()" % integer_field_type, 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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@skipUnlessDBFeature("supports_expression_indexes")
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def test_table_with_func_unique_constraint(self):
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out = StringIO()
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call_command("inspectdb", "inspectdb_funcuniqueconstraint", stdout=out)
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output = out.getvalue()
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self.assertIn("class InspectdbFuncuniqueconstraint(models.Model):", output)
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def test_managed_models(self):
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"""
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By default the command generates models with `Meta.managed = False`.
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"""
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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(
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" managed = False",
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output,
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msg="inspectdb should generate unmanaged models.",
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)
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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 = self.unique_re.findall(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))"
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% 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(
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PeopleMoreData._meta.db_table
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),
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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(
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self.unique_re.findall(output), ["('id', 'people_unique')"]
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)
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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(
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connection.vendor == "sqlite",
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"Only patched sqlite's DatabaseIntrospection.data_types_reverse for this test",
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)
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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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with mock.patch(
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"django.db.connection.introspection.data_types_reverse."
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"base_data_types_reverse",
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{
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"text": "myfields.TextField",
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"bigint": "BigIntegerField",
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},
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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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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(
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"django.db.connection.introspection.get_table_list",
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return_value=[TableInfo(name="nonexistent", type="t")],
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):
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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 = ["inspectdb"]
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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(
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"inspectdb",
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table_name_filter=inspectdb_views_only,
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stdout=out,
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)
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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(
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"inspectdb",
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table_name_filter=inspectdb_views_only,
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include_views=True,
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stdout=out,
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)
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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:
|
|
cursor.execute("DROP VIEW inspectdb_people_view")
|
|
|
|
@skipUnlessDBFeature("can_introspect_materialized_views")
|
|
def test_include_materialized_views(self):
|
|
"""inspectdb --include-views creates models for materialized views."""
|
|
with connection.cursor() as cursor:
|
|
cursor.execute(
|
|
"CREATE MATERIALIZED VIEW inspectdb_people_materialized AS "
|
|
"SELECT id, name FROM inspectdb_people"
|
|
)
|
|
out = StringIO()
|
|
view_model = "class InspectdbPeopleMaterialized(models.Model):"
|
|
view_managed = "managed = False # Created from a view."
|
|
try:
|
|
call_command(
|
|
"inspectdb",
|
|
table_name_filter=inspectdb_views_only,
|
|
stdout=out,
|
|
)
|
|
no_views_output = out.getvalue()
|
|
self.assertNotIn(view_model, no_views_output)
|
|
self.assertNotIn(view_managed, no_views_output)
|
|
call_command(
|
|
"inspectdb",
|
|
table_name_filter=inspectdb_views_only,
|
|
include_views=True,
|
|
stdout=out,
|
|
)
|
|
with_views_output = out.getvalue()
|
|
self.assertIn(view_model, with_views_output)
|
|
self.assertIn(view_managed, with_views_output)
|
|
finally:
|
|
with connection.cursor() as cursor:
|
|
cursor.execute("DROP MATERIALIZED VIEW inspectdb_people_materialized")
|
|
|
|
@skipUnless(connection.vendor == "postgresql", "PostgreSQL specific SQL")
|
|
def test_include_partitions(self):
|
|
"""inspectdb --include-partitions creates models for partitions."""
|
|
with connection.cursor() as cursor:
|
|
cursor.execute(
|
|
"""\
|
|
CREATE TABLE inspectdb_partition_parent (name text not null)
|
|
PARTITION BY LIST (left(upper(name), 1))
|
|
"""
|
|
)
|
|
cursor.execute(
|
|
"""\
|
|
CREATE TABLE inspectdb_partition_child
|
|
PARTITION OF inspectdb_partition_parent
|
|
FOR VALUES IN ('A', 'B', 'C')
|
|
"""
|
|
)
|
|
out = StringIO()
|
|
partition_model_parent = "class InspectdbPartitionParent(models.Model):"
|
|
partition_model_child = "class InspectdbPartitionChild(models.Model):"
|
|
partition_managed = "managed = False # Created from a partition."
|
|
try:
|
|
call_command(
|
|
"inspectdb", table_name_filter=inspectdb_tables_only, stdout=out
|
|
)
|
|
no_partitions_output = out.getvalue()
|
|
self.assertIn(partition_model_parent, no_partitions_output)
|
|
self.assertNotIn(partition_model_child, no_partitions_output)
|
|
self.assertNotIn(partition_managed, no_partitions_output)
|
|
call_command(
|
|
"inspectdb",
|
|
table_name_filter=inspectdb_tables_only,
|
|
include_partitions=True,
|
|
stdout=out,
|
|
)
|
|
with_partitions_output = out.getvalue()
|
|
self.assertIn(partition_model_parent, with_partitions_output)
|
|
self.assertIn(partition_model_child, with_partitions_output)
|
|
self.assertIn(partition_managed, with_partitions_output)
|
|
finally:
|
|
with connection.cursor() as cursor:
|
|
cursor.execute("DROP TABLE IF EXISTS inspectdb_partition_child")
|
|
cursor.execute("DROP TABLE IF EXISTS inspectdb_partition_parent")
|
|
|
|
@skipUnless(connection.vendor == "postgresql", "PostgreSQL specific SQL")
|
|
def test_foreign_data_wrapper(self):
|
|
with connection.cursor() as cursor:
|
|
cursor.execute("CREATE EXTENSION IF NOT EXISTS file_fdw")
|
|
cursor.execute(
|
|
"CREATE SERVER inspectdb_server FOREIGN DATA WRAPPER file_fdw"
|
|
)
|
|
cursor.execute(
|
|
"""\
|
|
CREATE FOREIGN TABLE inspectdb_iris_foreign_table (
|
|
petal_length real,
|
|
petal_width real,
|
|
sepal_length real,
|
|
sepal_width real
|
|
) SERVER inspectdb_server OPTIONS (
|
|
filename %s
|
|
)
|
|
""",
|
|
[os.devnull],
|
|
)
|
|
out = StringIO()
|
|
foreign_table_model = "class InspectdbIrisForeignTable(models.Model):"
|
|
foreign_table_managed = "managed = False"
|
|
try:
|
|
call_command(
|
|
"inspectdb",
|
|
table_name_filter=inspectdb_tables_only,
|
|
stdout=out,
|
|
)
|
|
output = out.getvalue()
|
|
self.assertIn(foreign_table_model, output)
|
|
self.assertIn(foreign_table_managed, output)
|
|
finally:
|
|
with connection.cursor() as cursor:
|
|
cursor.execute(
|
|
"DROP FOREIGN TABLE IF EXISTS inspectdb_iris_foreign_table"
|
|
)
|
|
cursor.execute("DROP SERVER IF EXISTS inspectdb_server")
|
|
cursor.execute("DROP EXTENSION IF EXISTS file_fdw")
|