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Fixed #26967 -- Added MySQL support for AsGeoJSON, GeoHash, IsValid functions, and isvalid lookup.

This commit is contained in:
Sergey Fedoseev 2017-04-01 22:43:53 +05:00 committed by Tim Graham
parent 9a9e228321
commit 0a13b249e2
8 changed files with 68 additions and 30 deletions
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9
django/contrib/gis/db/backends/mysql/operations.py
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@ -72,11 +72,12 @@ class MySQLOperations(BaseSpatialOperations, DatabaseOperations):
@cached_property
def unsupported_functions(self):
unsupported = {
'AsGeoJSON', 'AsGML', 'AsKML', 'AsSVG', 'BoundingCircle',
'ForceRHR', 'GeoHash', 'IsValid', 'MakeValid', 'MemSize',
'Perimeter', 'PointOnSurface', 'Reverse', 'Scale', 'SnapToGrid',
'Transform', 'Translate',
'AsGML', 'AsKML', 'AsSVG', 'BoundingCircle', 'ForceRHR',
'MakeValid', 'MemSize', 'Perimeter', 'PointOnSurface', 'Reverse',
'Scale', 'SnapToGrid', 'Transform', 'Translate',
}
if self.connection.mysql_version < (5, 7, 5):
unsupported.update({'AsGeoJSON', 'GeoHash', 'IsValid'})
if self.is_mysql_5_5:
unsupported.update({'Difference', 'Distance', 'Intersection', 'SymDifference', 'Union'})
return unsupported

7
django/contrib/gis/db/models/functions.py
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@ -330,6 +330,13 @@ class GeoHash(GeoFunc):
expressions.append(self._handle_param(precision, 'precision', int))
super().__init__(*expressions, **extra)
def as_mysql(self, compiler, connection):
clone = self.copy()
# If no precision is provided, set it to the maximum.
if len(clone.source_expressions) < 2:
clone.source_expressions.append(Value(100))
return clone.as_sql(compiler, connection)
class Intersection(OracleToleranceMixin, GeomOutputGeoFunc):
arity = 2

8
docs/ref/contrib/gis/db-api.txt
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@ -341,7 +341,7 @@ Lookup Type PostGIS Oracle MySQL [#]_ SpatiaLite
:lookup:`equals` X X X X C
:lookup:`exact` X X X X B
:lookup:`intersects` X X X X B
:lookup:`isvalid` X X X (LWGEOM)
:lookup:`isvalid` X X X (≥ 5.7.5) X (LWGEOM)
:lookup:`overlaps` X X X X B
:lookup:`relate` X X X C
:lookup:`same_as` X X X X B
@ -372,7 +372,7 @@ functions are available on each spatial backend.
Function PostGIS Oracle MySQL SpatiaLite
==================================== ======= ============== =========== ==========
:class:`Area` X X X X
:class:`AsGeoJSON` X X
:class:`AsGeoJSON` X X (≥ 5.7.5) X
:class:`AsGML` X X X
:class:`AsKML` X X
:class:`AsSVG` X X
@ -382,9 +382,9 @@ Function PostGIS Oracle MySQL Spat
:class:`Distance` X X X (≥ 5.6.1) X
:class:`Envelope` X X X
:class:`ForceRHR` X
:class:`GeoHash` X X (LWGEOM)
:class:`GeoHash` X X (≥ 5.7.5) X (LWGEOM)
:class:`Intersection` X X X (≥ 5.6.1) X
:class:`IsValid` X X X (LWGEOM)
:class:`IsValid` X X X (≥ 5.7.5) X (LWGEOM)
:class:`Length` X X X X
:class:`MakeValid` X X (LWGEOM)
:class:`MemSize` X

26
docs/ref/contrib/gis/functions.txt
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@ -56,8 +56,8 @@ geographic SRSes.
.. class:: AsGeoJSON(expression, bbox=False, crs=False, precision=8, **extra)
*Availability*: `PostGIS <https://postgis.net/docs/ST_AsGeoJSON.html>`__,
SpatiaLite
*Availability*: MySQL (≥ 5.7.5), `PostGIS
<https://postgis.net/docs/ST_AsGeoJSON.html>`__, SpatiaLite
Accepts a single geographic field or expression and returns a `GeoJSON
<http://geojson.org/>`_ representation of the geometry. Note that the result is
@ -77,13 +77,17 @@ Keyword Argument Description
``crs`` Set this to ``True`` if you want the coordinate
reference system to be included in the returned
GeoJSON.
GeoJSON. Ignored on MySQL.
``precision`` It may be used to specify the number of significant
digits for the coordinates in the GeoJSON
representation -- the default value is 8.
===================== =====================================================
.. versionchanged:: 2.0
MySQL support was added.
``AsGML``
=========
@ -286,8 +290,8 @@ right-hand rule.
.. class:: GeoHash(expression, precision=None, **extra)
*Availability*: `PostGIS <https://postgis.net/docs/ST_GeoHash.html>`__,
SpatiaLite (LWGEOM)
*Availability*: MySQL (≥ 5.7.5), `PostGIS
<https://postgis.net/docs/ST_GeoHash.html>`__, SpatiaLite (LWGEOM)
Accepts a single geographic field or expression and returns a `GeoHash`__
representation of the geometry.
@ -295,6 +299,10 @@ representation of the geometry.
The ``precision`` keyword argument controls the number of characters in the
result.
.. versionchanged:: 2.0
MySQL support was added.
__ https://en.wikipedia.org/wiki/Geohash
``Intersection``
@ -313,8 +321,8 @@ intersection between them.
.. class:: IsValid(expr)
*Availability*: `PostGIS <https://postgis.net/docs/ST_IsValid.html>`__,
Oracle, SpatiaLite (LWGEOM)
*Availability*: MySQL (≥ 5.7.5), `PostGIS
<https://postgis.net/docs/ST_IsValid.html>`__, Oracle, SpatiaLite (LWGEOM)
Accepts a geographic field or expression and tests if the value is well formed.
Returns ``True`` if its value is a valid geometry and ``False`` otherwise.
@ -323,6 +331,10 @@ Returns ``True`` if its value is a valid geometry and ``False`` otherwise.
SpatiaLite and Oracle support was added.
.. versionchanged:: 2.0
MySQL support was added.
``Length``
==========

16
docs/ref/contrib/gis/geoquerysets.txt
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@ -306,8 +306,8 @@ SpatiaLite ``Intersects(poly, geom)``
``isvalid``
-----------
*Availability*: `PostGIS <https://postgis.net/docs/ST_IsValid.html>`__,
Oracle, SpatiaLite
*Availability*: MySQL (≥ 5.7.5), `PostGIS
<https://postgis.net/docs/ST_IsValid.html>`__, Oracle, SpatiaLite
Tests if the geometry is valid.
@ -315,17 +315,21 @@ Example::
Zipcode.objects.filter(poly__isvalid=True)
=================== ================================================================
========================== ================================================================
Backend SQL Equivalent
=================== ================================================================
PostGIS, SpatiaLite ``ST_IsValid(poly)``
========================== ================================================================
MySQL, PostGIS, SpatiaLite ``ST_IsValid(poly)``
Oracle ``SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT(poly, 0.05) = 'TRUE'``
=================== ================================================================
========================== ================================================================
.. versionchanged:: 1.11
Oracle and SpatiaLite support was added.
.. versionchanged:: 2.0
MySQL support was added.
.. fieldlookup:: overlaps
``overlaps``

6
docs/releases/2.0.txt
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@ -62,7 +62,11 @@ Minor features
:mod:`django.contrib.gis`
~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
* Added MySQL support for the
:class:`~django.contrib.gis.db.models.functions.AsGeoJSON` function,
:class:`~django.contrib.gis.db.models.functions.GeoHash` function,
:class:`~django.contrib.gis.db.models.functions.IsValid` function, and
:lookup:`isvalid` lookup.
:mod:`django.contrib.messages`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

15
tests/gis_tests/geoapp/test_functions.py
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@ -1,3 +1,4 @@
import json
import re
from decimal import Decimal
@ -44,6 +45,12 @@ class GISFunctionsTests(TestCase):
'{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},'
'"bbox":[-87.65018,41.85039,-87.65018,41.85039],"coordinates":[-87.65018,41.85039]}'
)
# MySQL ignores the crs option.
if mysql:
houston_json = json.loads(houston_json)
del houston_json['crs']
chicago_json = json.loads(chicago_json)
del chicago_json['crs']
# Precision argument should only be an integer
with self.assertRaises(TypeError):
@ -61,8 +68,8 @@ class GISFunctionsTests(TestCase):
# WHERE "geoapp_city"."name" = 'Houston';
# This time we want to include the CRS by using the `crs` keyword.
self.assertJSONEqual(
City.objects.annotate(json=functions.AsGeoJSON('point', crs=True)).get(name='Houston').json,
houston_json,
City.objects.annotate(json=functions.AsGeoJSON('point', crs=True)).get(name='Houston').json
)
# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 1) FROM "geoapp_city"
@ -79,10 +86,10 @@ class GISFunctionsTests(TestCase):
# WHERE "geoapp_city"."name" = 'Chicago';
# Finally, we set every available keyword.
self.assertJSONEqual(
chicago_json,
City.objects.annotate(
geojson=functions.AsGeoJSON('point', bbox=True, crs=True, precision=5)
).get(name='Chicago').geojson
).get(name='Chicago').geojson,
chicago_json,
)
@skipUnlessDBFeature("has_AsGML_function")
@ -224,7 +231,7 @@ class GISFunctionsTests(TestCase):
ref_hash = '9vk1mfq8jx0c8e0386z6'
h1 = City.objects.annotate(geohash=functions.GeoHash('point')).get(name='Houston')
h2 = City.objects.annotate(geohash=functions.GeoHash('point', precision=5)).get(name='Houston')
self.assertEqual(ref_hash, h1.geohash)
self.assertEqual(ref_hash, h1.geohash[:len(ref_hash)])
self.assertEqual(ref_hash[:5], h2.geohash)
@skipUnlessDBFeature("has_Intersection_function")

7
tests/gis_tests/geoapp/tests.py
View File

@ -11,7 +11,9 @@ from django.core.management import call_command
from django.db import connection
from django.test import TestCase, skipUnlessDBFeature
from ..utils import no_oracle, oracle, postgis, skipUnlessGISLookup, spatialite
from ..utils import (
mysql, no_oracle, oracle, postgis, skipUnlessGISLookup, spatialite,
)
from .models import (
City, Country, Feature, MinusOneSRID, NonConcreteModel, PennsylvaniaCity,
State, Track,
@ -302,9 +304,10 @@ class GeoLookupTest(TestCase):
invalid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 1 1, 1 0, 0 0))')
State.objects.create(name='invalid', poly=invalid_geom)
qs = State.objects.all()
if oracle:
if oracle or mysql:
# Kansas has adjacent vertices with distance 6.99244813842e-12
# which is smaller than the default Oracle tolerance.
# It's invalid on MySQL too.
qs = qs.exclude(name='Kansas')
self.assertEqual(State.objects.filter(name='Kansas', poly__isvalid=False).count(), 1)
self.assertEqual(qs.filter(poly__isvalid=False).count(), 1)