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254 lines
9.3 KiB
Python
254 lines
9.3 KiB
Python
import os
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import re
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from io import StringIO
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from django.contrib.gis.gdal import GDAL_VERSION, Driver, GDALException
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from django.contrib.gis.utils.ogrinspect import ogrinspect
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from django.core.management import call_command
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from django.db import connection, connections
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from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
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from django.test.utils import modify_settings
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from ..test_data import TEST_DATA
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from .models import AllOGRFields
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class InspectDbTests(TestCase):
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def test_geom_columns(self):
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"""
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Test the geo-enabled inspectdb command.
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"""
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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 == "inspectapp_allogrfields",
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stdout=out,
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)
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output = out.getvalue()
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if connection.features.supports_geometry_field_introspection:
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self.assertIn("geom = models.PolygonField()", output)
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self.assertIn("point = models.PointField()", output)
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else:
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self.assertIn("geom = models.GeometryField(", output)
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self.assertIn("point = models.GeometryField(", output)
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@skipUnlessDBFeature("supports_3d_storage")
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def test_3d_columns(self):
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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 == "inspectapp_fields3d",
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stdout=out,
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)
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output = out.getvalue()
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if connection.features.supports_geometry_field_introspection:
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self.assertIn("point = models.PointField(dim=3)", output)
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if connection.features.supports_geography:
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self.assertIn(
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"pointg = models.PointField(geography=True, dim=3)", output
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)
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else:
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self.assertIn("pointg = models.PointField(dim=3)", output)
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self.assertIn("line = models.LineStringField(dim=3)", output)
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self.assertIn("poly = models.PolygonField(dim=3)", output)
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else:
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self.assertIn("point = models.GeometryField(", output)
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self.assertIn("pointg = models.GeometryField(", output)
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self.assertIn("line = models.GeometryField(", output)
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self.assertIn("poly = models.GeometryField(", output)
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@modify_settings(
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INSTALLED_APPS={"append": "django.contrib.gis"},
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)
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class OGRInspectTest(SimpleTestCase):
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maxDiff = 1024
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def test_poly(self):
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shp_file = os.path.join(TEST_DATA, "test_poly", "test_poly.shp")
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model_def = ogrinspect(shp_file, "MyModel")
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expected = [
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"# This is an auto-generated Django model module created by ogrinspect.",
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"from django.contrib.gis.db import models",
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"",
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"",
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"class MyModel(models.Model):",
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" float = models.FloatField()",
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" int = models.BigIntegerField()",
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" str = models.CharField(max_length=80)",
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" geom = models.PolygonField()",
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]
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self.assertEqual(model_def, "\n".join(expected))
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def test_poly_multi(self):
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shp_file = os.path.join(TEST_DATA, "test_poly", "test_poly.shp")
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model_def = ogrinspect(shp_file, "MyModel", multi_geom=True)
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self.assertIn("geom = models.MultiPolygonField()", model_def)
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# Same test with a 25D-type geometry field
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shp_file = os.path.join(TEST_DATA, "gas_lines", "gas_leitung.shp")
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model_def = ogrinspect(shp_file, "MyModel", multi_geom=True)
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srid = "-1" if GDAL_VERSION < (2, 3) else "31253"
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self.assertIn("geom = models.MultiLineStringField(srid=%s)" % srid, model_def)
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def test_date_field(self):
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shp_file = os.path.join(TEST_DATA, "cities", "cities.shp")
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model_def = ogrinspect(shp_file, "City")
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expected = [
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"# This is an auto-generated Django model module created by ogrinspect.",
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"from django.contrib.gis.db import models",
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"",
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"",
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"class City(models.Model):",
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" name = models.CharField(max_length=80)",
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" population = models.BigIntegerField()",
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" density = models.FloatField()",
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" created = models.DateField()",
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" geom = models.PointField()",
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]
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self.assertEqual(model_def, "\n".join(expected))
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def test_time_field(self):
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# Getting the database identifier used by OGR, if None returned
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# GDAL does not have the support compiled in.
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ogr_db = get_ogr_db_string()
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if not ogr_db:
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self.skipTest("Unable to setup an OGR connection to your database")
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try:
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# Writing shapefiles via GDAL currently does not support writing OGRTime
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# fields, so we need to actually use a database
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model_def = ogrinspect(
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ogr_db,
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"Measurement",
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layer_key=AllOGRFields._meta.db_table,
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decimal=["f_decimal"],
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)
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except GDALException:
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self.skipTest("Unable to setup an OGR connection to your database")
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self.assertTrue(
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model_def.startswith(
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"# This is an auto-generated Django model module created by "
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"ogrinspect.\n"
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"from django.contrib.gis.db import models\n"
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"\n"
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"\n"
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"class Measurement(models.Model):\n"
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)
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)
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# The ordering of model fields might vary depending on several factors
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# (version of GDAL, etc.).
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if connection.vendor == "sqlite":
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# SpatiaLite introspection is somewhat lacking (#29461).
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self.assertIn(" f_decimal = models.CharField(max_length=0)", model_def)
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else:
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self.assertIn(
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" f_decimal = models.DecimalField(max_digits=0, decimal_places=0)",
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model_def,
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)
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self.assertIn(" f_int = models.IntegerField()", model_def)
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if not connection.ops.mariadb:
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# Probably a bug between GDAL and MariaDB on time fields.
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self.assertIn(" f_datetime = models.DateTimeField()", model_def)
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self.assertIn(" f_time = models.TimeField()", model_def)
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if connection.vendor == "sqlite":
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self.assertIn(" f_float = models.CharField(max_length=0)", model_def)
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else:
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self.assertIn(" f_float = models.FloatField()", model_def)
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max_length = 0 if connection.vendor == "sqlite" else 10
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self.assertIn(
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" f_char = models.CharField(max_length=%s)" % max_length, model_def
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)
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self.assertIn(" f_date = models.DateField()", model_def)
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# Some backends may have srid=-1
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self.assertIsNotNone(
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re.search(r" geom = models.PolygonField\(([^\)])*\)", model_def)
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)
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def test_management_command(self):
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shp_file = os.path.join(TEST_DATA, "cities", "cities.shp")
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out = StringIO()
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call_command("ogrinspect", shp_file, "City", stdout=out)
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output = out.getvalue()
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self.assertIn("class City(models.Model):", output)
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def test_mapping_option(self):
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expected = (
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" geom = models.PointField()\n"
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"\n"
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"\n"
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"# Auto-generated `LayerMapping` dictionary for City model\n"
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"city_mapping = {\n"
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" 'name': 'Name',\n"
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" 'population': 'Population',\n"
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" 'density': 'Density',\n"
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" 'created': 'Created',\n"
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" 'geom': 'POINT',\n"
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"}\n"
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)
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shp_file = os.path.join(TEST_DATA, "cities", "cities.shp")
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out = StringIO()
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call_command("ogrinspect", shp_file, "--mapping", "City", stdout=out)
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self.assertIn(expected, out.getvalue())
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def get_ogr_db_string():
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"""
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Construct the DB string that GDAL will use to inspect the database.
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GDAL will create its own connection to the database, so we re-use the
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connection settings from the Django test.
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"""
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db = connections.databases["default"]
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# Map from the django backend into the OGR driver name and database identifier
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# https://gdal.org/drivers/vector/
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#
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# TODO: Support Oracle (OCI).
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drivers = {
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"django.contrib.gis.db.backends.postgis": (
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"PostgreSQL",
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"PG:dbname='%(db_name)s'",
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" ",
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),
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"django.contrib.gis.db.backends.mysql": ("MySQL", 'MYSQL:"%(db_name)s"', ","),
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"django.contrib.gis.db.backends.spatialite": ("SQLite", "%(db_name)s", ""),
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}
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db_engine = db["ENGINE"]
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if db_engine not in drivers:
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return None
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drv_name, db_str, param_sep = drivers[db_engine]
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# Ensure that GDAL library has driver support for the database.
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try:
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Driver(drv_name)
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except GDALException:
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return None
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# SQLite/SpatiaLite in-memory databases
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if db["NAME"] == ":memory:":
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return None
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# Build the params of the OGR database connection string
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params = [db_str % {"db_name": db["NAME"]}]
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def add(key, template):
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value = db.get(key, None)
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# Don't add the parameter if it is not in django's settings
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if value:
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params.append(template % value)
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add("HOST", "host='%s'")
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add("PORT", "port='%s'")
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add("USER", "user='%s'")
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add("PASSWORD", "password='%s'")
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return param_sep.join(params)
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