Fixed integer overflows that occurred when `OFTReal` fields were treated as `OFTInteger`.

        # OFTReal with no precision should be an OFTInteger.

        if isinstance(self, OFTReal) and self.precision == 0:

            self.__class__ = OFTInteger

            self._double = True

    def __str__(self):

        "Returns the string representation of the Field."

### The Field sub-classes for each OGR Field type. ###

class OFTInteger(Field):

    _double = False

    @property

    def value(self):

        "Returns an integer contained in this field."

        if self._double:

            # If this is really from an OFTReal field with no precision,

            # read as a double and cast as Python int (to prevent overflow).

            return int(self.as_double())

        else:

            return self.as_int()

    @property

import os, os.path, unittest

import os

import unittest

from django.contrib.gis.gdal import DataSource, Envelope, OGRGeometry, OGRException, OGRIndexError, GDAL_VERSION

from django.contrib.gis.gdal.field import OFTReal, OFTInteger, OFTString

from django.contrib.gis.geometry.test_data import get_ds_file, TestDS

from django.contrib.gis.geometry.test_data import get_ds_file, TestDS, TEST_DATA

# List of acceptable data sources.

ds_list = (TestDS('test_point', nfeat=5, nfld=3, geom='POINT', gtype=1, driver='ESRI Shapefile',

                self.assertEqual(source.nfld, len(layer.fields))

                # Testing the layer's extent (an Envelope), and it's properties

                if source.driver == 'VRT' and (GDAL_VERSION > (1, 7, 0) and GDAL_VERSION < (1, 7, 3)):

                if source.driver == 'VRT' and (GDAL_VERSION >= (1, 7, 0) and GDAL_VERSION < (1, 7, 3)):

                    # There's a known GDAL regression with retrieving the extent

                    # of a VRT layer in versions 1.7.0-1.7.2:

                    #  http://trac.osgeo.org/gdal/ticket/3783

        lyr.spatial_filter = None

        self.assertEqual(3, len(lyr))

    def test07_integer_overflow(self):

        "Testing that OFTReal fields, treated as OFTInteger, do not overflow."

        # Using *.dbf from Census 2010 TIGER Shapefile for Texas,

        # which has land area ('ALAND10') stored in a Real field

        # with no precision.

        ds = DataSource(os.path.join(TEST_DATA, 'texas.dbf'))

        feat = ds[0][0]

        # Reference value obtained using `ogrinfo`.

        self.assertEqual(676586997978, feat.get('ALAND10'))

def suite():

    s = unittest.TestSuite()

    s.addTest(unittest.makeSuite(DataSourceTest))