127 lines
4.7 KiB
Python
127 lines
4.7 KiB
Python
from __future__ import absolute_import
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import os
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from django.db import connections
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from django.test import TestCase
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from django.contrib.gis.gdal import Driver
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from django.contrib.gis.geometry.test_data import TEST_DATA
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from django.contrib.gis.utils.ogrinspect import ogrinspect
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from .models import AllOGRFields
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class OGRInspectTest(TestCase):
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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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'class MyModel(models.Model):',
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' float = models.FloatField()',
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' int = models.FloatField()',
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' str = models.CharField(max_length=80)',
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' geom = models.PolygonField(srid=-1)',
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' objects = models.GeoManager()',
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]
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self.assertEqual(model_def, '\n'.join(expected))
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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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'class City(models.Model):',
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' name = models.CharField(max_length=80)',
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' population = models.FloatField()',
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' density = models.FloatField()',
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' created = models.DateField()',
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' geom = models.PointField(srid=-1)',
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' objects = models.GeoManager()',
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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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# Only possible to test this on PostGIS at the momemnt. MySQL
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# complains about permissions, and SpatiaLite/Oracle are
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# insanely difficult to get support compiled in for in GDAL.
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if not connections['default'].ops.postgis:
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return
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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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return
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# writing shapefules 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(ogr_db, 'Measurement',
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layer_key=AllOGRFields._meta.db_table,
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decimal=['f_decimal'])
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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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'class Measurement(models.Model):',
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' f_decimal = models.DecimalField(max_digits=0, decimal_places=0)',
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' f_int = models.IntegerField()',
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' f_datetime = models.DateTimeField()',
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' f_time = models.TimeField()',
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' f_float = models.FloatField()',
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' f_char = models.CharField(max_length=10)',
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' f_date = models.DateField()',
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' geom = models.PolygonField()',
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' objects = models.GeoManager()',
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]
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self.assertEqual(model_def, '\n'.join(expected))
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def get_ogr_db_string():
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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. This approach is a bit fragile
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# and cannot work on any other database other than PostgreSQL at the moment.
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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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# http://www.gdal.org/ogr/ogr_formats.html
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#
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# TODO: Support Oracle (OCI), MySQL, and SpatiaLite.
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drivers = {
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'django.contrib.gis.db.backends.postgis': ('PostgreSQL', 'PG'),
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}
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drv_name, db_str = 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:
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return None
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# Build the params of the OGR database connection string
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# TODO: connection strings are database-dependent, thus if
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# we ever test other backends, this will need to change.
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params = ["dbname='%s'" % 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 '%s:%s' % (db_str, ' '.join(params))
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