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from django.core.management import call_command
from django.db import connection
from django.test import TransactionTestCase
class MigrateTests(TransactionTestCase):
"""
Tests running the migrate command in Geodjango.
"""
available_apps = ["gis_tests.gis_migrations"]
def get_table_description(self, table):
with connection.cursor() as cursor:
return connection.introspection.get_table_description(cursor, table)
def assertTableExists(self, table):
with connection.cursor() as cursor:
self.assertIn(table, connection.introspection.table_names(cursor))
def assertTableNotExists(self, table):
with connection.cursor() as cursor:
self.assertNotIn(table, connection.introspection.table_names(cursor))
def test_migrate_gis(self):
"""
Tests basic usage of the migrate command when a model uses Geodjango
fields (#22001).
It's also used to showcase an error in migrations where spatialite is
enabled and geo tables are renamed resulting in unique constraint
failure on geometry_columns (#23030).
"""
# The right tables exist
self.assertTableExists("gis_migrations_neighborhood")
self.assertTableExists("gis_migrations_household")
self.assertTableExists("gis_migrations_family")
if connection.features.supports_raster:
self.assertTableExists("gis_migrations_heatmap")
# Unmigrate models.
call_command("migrate", "gis_migrations", "0001", verbosity=0)
# All tables are gone
self.assertTableNotExists("gis_migrations_neighborhood")
self.assertTableNotExists("gis_migrations_household")
self.assertTableNotExists("gis_migrations_family")
if connection.features.supports_raster:
self.assertTableNotExists("gis_migrations_heatmap")
# Even geometry columns metadata
try:
GeoColumn = connection.ops.geometry_columns()
except NotImplementedError:
# Not all GIS backends have geometry columns model
pass
else:
qs = GeoColumn.objects.filter(
**{'%s__in' % GeoColumn.table_name_col(): ["gis_neighborhood", "gis_household"]}
)
self.assertEqual(qs.count(), 0)
# Revert the "unmigration"
call_command("migrate", "gis_migrations", verbosity=0)
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