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Code Issues 32 Releases Wiki Activity

gis: Revised changes to GeoWhereNode to reduce code duplication. Thanks, Malcolm.

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git-svn-id: http://code.djangoproject.com/svn/django/branches/gis@7839 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Justin Bronn 2008-07-05 15:40:55 +00:00
parent bc3d6b4908
commit 597b07117a
1 changed files with 12 additions and 29 deletions
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41
django/contrib/gis/db/models/sql/where.py
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@ -25,43 +25,26 @@ class GeoWhereNode(WhereNode):
This is overridden from the regular WhereNode to handle the
peculiarties of GeometryFields, because they need a special
annotation object that contains the spatial metadata from the
field so that the correct spatial SQL is generated.
field to generate the spatial SQL.
"""
if not isinstance(data, (list, tuple)):
super(WhereNode, self).add(data, connector)
return
alias, col, field, lookup_type, value = data
# Do we have a geographic field?
geo_field = hasattr(field, '_geom')
if field:
if geo_field:
# `GeometryField.get_db_prep_lookup` returns a where clause
# substitution array in addition to the parameters.
where, params = field.get_db_prep_lookup(lookup_type, value)
else:
params = field.get_db_prep_lookup(lookup_type, value)
db_type = field.db_type()
return super(WhereNode, self).add(data, connector)
alias, col, field, lookup_type, value = data
if not hasattr(field, "_geom"):
# Not a geographic field, so call `WhereNode.add`.
return super(GeoWhereNode, self).add(data, connector)
else:
# This is possible when we add a comparison to NULL sometimes (we
# don't really need to waste time looking up the associated field
# object).
params = Field().get_db_prep_lookup(lookup_type, value)
db_type = None
if geo_field:
# `GeometryField.get_db_prep_lookup` returns a where clause
# substitution array in addition to the parameters.
where, params = field.get_db_prep_lookup(lookup_type, value)
# The annotation will be a `GeoAnnotation` object that
# will contain the necessary geometry field metadata for
# the `get_geo_where_clause` to construct the appropriate
# spatial SQL when `make_atom` is called.
annotation = GeoAnnotation(field, value, where)
elif isinstance(value, datetime.datetime):
annotation = datetime.datetime
else:
annotation = bool(value)
super(WhereNode, self).add((alias, col, db_type, lookup_type,
annotation, params), connector)
return super(WhereNode, self).add((alias, col, field.db_type(), lookup_type,
annotation, params), connector)
def make_atom(self, child, qn):
table_alias, name, db_type, lookup_type, value_annot, params = child