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from __future__ import unicode_literals
from unittest import skipUnless
from django.contrib.gis.tests.utils import HAS_SPATIAL_DB
from django.db import connection, migrations, models
from django.db.migrations.migration import Migration
from django.db.migrations.state import ProjectState
from django.test import TransactionTestCase
if HAS_SPATIAL_DB:
from django.contrib.gis.db.models import fields
try:
GeometryColumns = connection.ops.geometry_columns()
HAS_GEOMETRY_COLUMNS = True
except NotImplementedError:
HAS_GEOMETRY_COLUMNS = False
@skipUnless(HAS_SPATIAL_DB, "Spatial db is required.")
class OperationTests(TransactionTestCase):
available_apps = ["django.contrib.gis.tests.gis_migrations"]
def tearDown(self):
# Delete table after testing
self.apply_operations('gis', self.current_state, [migrations.DeleteModel("Neighborhood")])
super(OperationTests, self).tearDown()
def get_table_description(self, table):
with connection.cursor() as cursor:
return connection.introspection.get_table_description(cursor, table)
def assertColumnExists(self, table, column):
self.assertIn(column, [c.name for c in self.get_table_description(table)])
def assertColumnNotExists(self, table, column):
self.assertNotIn(column, [c.name for c in self.get_table_description(table)])
def apply_operations(self, app_label, project_state, operations):
migration = Migration('name', app_label)
migration.operations = operations
with connection.schema_editor() as editor:
return migration.apply(project_state, editor)
def set_up_test_model(self):
operations = [migrations.CreateModel(
"Neighborhood",
[
("id", models.AutoField(primary_key=True)),
('name', models.CharField(max_length=100, unique=True)),
('geom', fields.MultiPolygonField(srid=4326, null=True)),
],
)]
return self.apply_operations('gis', ProjectState(), operations)
def test_add_gis_field(self):
"""
Tests the AddField operation with a GIS-enabled column.
"""
project_state = self.set_up_test_model()
operation = migrations.AddField(
"Neighborhood",
"path",
fields.LineStringField(srid=4326, null=True, blank=True),
)
new_state = project_state.clone()
operation.state_forwards("gis", new_state)
with connection.schema_editor() as editor:
operation.database_forwards("gis", editor, project_state, new_state)
self.assertColumnExists("gis_neighborhood", "path")
# Test GeometryColumns when available
if HAS_GEOMETRY_COLUMNS:
self.assertEqual(
GeometryColumns.objects.filter(**{GeometryColumns.table_name_col(): "gis_neighborhood"}).count(),
2
)
self.current_state = new_state
def test_remove_gis_field(self):
"""
Tests the RemoveField operation with a GIS-enabled column.
"""
project_state = self.set_up_test_model()
operation = migrations.RemoveField("Neighborhood", "geom")
new_state = project_state.clone()
operation.state_forwards("gis", new_state)
with connection.schema_editor() as editor:
operation.database_forwards("gis", editor, project_state, new_state)
self.assertColumnNotExists("gis_neighborhood", "geom")
# Test GeometryColumns when available
if HAS_GEOMETRY_COLUMNS:
self.assertEqual(
GeometryColumns.objects.filter(**{GeometryColumns.table_name_col(): "gis_neighborhood"}).count(),
0
)
self.current_state = new_state
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