Removed GeoWhereNode, obsoleted by GISLookup

django/contrib/gis/db/models/lookups.py

@@ -1,10 +1,51 @@
+from django.db.models.constants import LOOKUP_SEP
+from django.db.models.fields import FieldDoesNotExist
 from django.db.models.lookups import Lookup
 from django.db.models.sql.expressions import SQLEvaluator
 
 
 class GISLookup(Lookup):
+    @classmethod
+    def _check_geo_field(cls, opts, lookup):
+        """
+        Utility for checking the given lookup with the given model options.
+        The lookup is a string either specifying the geographic field, e.g.
+        'point, 'the_geom', or a related lookup on a geographic field like
+        'address__point'.
+
+        If a GeometryField exists according to the given lookup on the model
+        options, it will be returned.  Otherwise returns None.
+        """
+        from django.contrib.gis.db.models.fields import GeometryField
+        # This takes into account the situation where the lookup is a
+        # lookup to a related geographic field, e.g., 'address__point'.
+        field_list = lookup.split(LOOKUP_SEP)
+
+        # Reversing so list operates like a queue of related lookups,
+        # and popping the top lookup.
+        field_list.reverse()
+        fld_name = field_list.pop()
+
+        try:
+            geo_fld = opts.get_field(fld_name)
+            # If the field list is still around, then it means that the
+            # lookup was for a geometry field across a relationship --
+            # thus we keep on getting the related model options and the
+            # model field associated with the next field in the list
+            # until there's no more left.
+            while len(field_list):
+                opts = geo_fld.rel.to._meta
+                geo_fld = opts.get_field(field_list.pop())
+        except (FieldDoesNotExist, AttributeError):
+            return False
+
+        # Finally, make sure we got a Geographic field and return.
+        if isinstance(geo_fld, GeometryField):
+            return geo_fld
+        else:
+            return False
+
     def as_sql(self, qn, connection):
-        from django.contrib.gis.db.models.sql import GeoWhereNode
         # We use the same approach as was used by GeoWhereNode. It would
         # be a good idea to upgrade GIS to use similar code that is used
         # for other lookups.
@@ -12,7 +53,7 @@ class GISLookup(Lookup):
             # Make sure the F Expression destination field exists, and
             # set an `srid` attribute with the same as that of the
             # destination.
-            geo_fld = GeoWhereNode._check_geo_field(self.rhs.opts, self.rhs.expression.name)
+            geo_fld = self._check_geo_field(self.rhs.opts, self.rhs.expression.name)
             if not geo_fld:
                 raise ValueError('No geographic field found in expression.')
             self.rhs.srid = geo_fld.srid

django/contrib/gis/db/models/sql/__init__.py

@@ -1,7 +1,6 @@
 from django.contrib.gis.db.models.sql.conversion import AreaField, DistanceField, GeomField
 from django.contrib.gis.db.models.sql.query import GeoQuery
-from django.contrib.gis.db.models.sql.where import GeoWhereNode
 
 __all__ = [
-    'AreaField', 'DistanceField', 'GeomField', 'GeoQuery', 'GeoWhereNode',
+    'AreaField', 'DistanceField', 'GeomField', 'GeoQuery',
 ]

django/contrib/gis/db/models/sql/query.py

@@ -3,9 +3,9 @@ from django.db.models.query import sql
 
 from django.contrib.gis.db.models.constants import ALL_TERMS
 from django.contrib.gis.db.models.fields import GeometryField
+from django.contrib.gis.db.models.lookups import GISLookup
 from django.contrib.gis.db.models.sql import aggregates as gis_aggregates
 from django.contrib.gis.db.models.sql.conversion import AreaField, DistanceField, GeomField
-from django.contrib.gis.db.models.sql.where import GeoWhereNode
 from django.contrib.gis.geometry.backend import Geometry
 from django.contrib.gis.measure import Area, Distance
 
@@ -21,11 +21,10 @@ class GeoQuery(sql.Query):
     compiler = 'GeoSQLCompiler'
 
     #### Methods overridden from the base Query class ####
-    def __init__(self, model, where=GeoWhereNode):
+    def __init__(self, model):
-        super(GeoQuery, self).__init__(model, where)
+        super(GeoQuery, self).__init__(model) #, where)
         # The following attributes are customized for the GeoQuerySet.
-        # The GeoWhereNode and SpatialBackend classes contain backend-specific
+        # The SpatialBackend classes contain backend-specific routines and functions.
-        # routines and functions.
         self.custom_select = {}
         self.transformed_srid = None
         self.extra_select_fields = {}
@@ -108,4 +107,4 @@ class GeoQuery(sql.Query):
         else:
             # Otherwise, check by the given field name -- which may be
             # a lookup to a _related_ geographic field.
-            return GeoWhereNode._check_geo_field(self.model._meta, field_name)
+            return GISLookup._check_geo_field(self.model._meta, field_name)

django/contrib/gis/db/models/sql/where.py

@@ -1,93 +0,0 @@
-from django.db.models.constants import LOOKUP_SEP
-from django.db.models.fields import FieldDoesNotExist
-from django.db.models.sql.expressions import SQLEvaluator
-from django.db.models.sql.where import Constraint, WhereNode
-from django.contrib.gis.db.models.fields import GeometryField
-
-
-class GeoConstraint(Constraint):
-    """
-    This subclass overrides `process` to better handle geographic SQL
-    construction.
-    """
-    def __init__(self, init_constraint):
-        self.alias = init_constraint.alias
-        self.col = init_constraint.col
-        self.field = init_constraint.field
-
-    def process(self, lookup_type, value, connection):
-        if isinstance(value, SQLEvaluator):
-            # Make sure the F Expression destination field exists, and
-            # set an `srid` attribute with the same as that of the
-            # destination.
-            geo_fld = GeoWhereNode._check_geo_field(value.opts, value.expression.name)
-            if not geo_fld:
-                raise ValueError('No geographic field found in expression.')
-            value.srid = geo_fld.srid
-        db_type = self.field.db_type(connection=connection)
-        params = self.field.get_db_prep_lookup(lookup_type, value, connection=connection)
-        return (self.alias, self.col, db_type), params
-
-
-class GeoWhereNode(WhereNode):
-    """
-    Used to represent the SQL where-clause for spatial databases --
-    these are tied to the GeoQuery class that created it.
-    """
-
-    def _prepare_data(self, data):
-        if isinstance(data, (list, tuple)):
-            obj, lookup_type, value = data
-            if (isinstance(obj, Constraint) and
-                    isinstance(obj.field, GeometryField)):
-                data = (GeoConstraint(obj), lookup_type, value)
-        return super(GeoWhereNode, self)._prepare_data(data)
-
-    def make_atom(self, child, qn, connection):
-        lvalue, lookup_type, value_annot, params_or_value = child
-        if isinstance(lvalue, GeoConstraint):
-            data, params = lvalue.process(lookup_type, params_or_value, connection)
-            spatial_sql, spatial_params = connection.ops.spatial_lookup_sql(
-                data, lookup_type, params_or_value, lvalue.field, qn)
-            return spatial_sql, spatial_params + params
-        else:
-            return super(GeoWhereNode, self).make_atom(child, qn, connection)
-
-    @classmethod
-    def _check_geo_field(cls, opts, lookup):
-        """
-        Utility for checking the given lookup with the given model options.
-        The lookup is a string either specifying the geographic field, e.g.
-        'point, 'the_geom', or a related lookup on a geographic field like
-        'address__point'.
-
-        If a GeometryField exists according to the given lookup on the model
-        options, it will be returned.  Otherwise returns None.
-        """
-        # This takes into account the situation where the lookup is a
-        # lookup to a related geographic field, e.g., 'address__point'.
-        field_list = lookup.split(LOOKUP_SEP)
-
-        # Reversing so list operates like a queue of related lookups,
-        # and popping the top lookup.
-        field_list.reverse()
-        fld_name = field_list.pop()
-
-        try:
-            geo_fld = opts.get_field(fld_name)
-            # If the field list is still around, then it means that the
-            # lookup was for a geometry field across a relationship --
-            # thus we keep on getting the related model options and the
-            # model field associated with the next field in the list
-            # until there's no more left.
-            while len(field_list):
-                opts = geo_fld.rel.to._meta
-                geo_fld = opts.get_field(field_list.pop())
-        except (FieldDoesNotExist, AttributeError):
-            return False
-
-        # Finally, make sure we got a Geographic field and return.
-        if isinstance(geo_fld, GeometryField):
-            return geo_fld
-        else:
-            return False