--- a/web/lib/django/contrib/gis/db/backend/mysql/field.py Wed May 19 17:43:59 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,53 +0,0 @@
-from django.db import connection
-from django.db.models.fields import Field # Django base Field class
-from django.contrib.gis.db.backend.mysql.query import GEOM_FROM_TEXT
-
-# Quotename & geographic quotename, respectively.
-qn = connection.ops.quote_name
-
-class MySQLGeoField(Field):
- """
- The backend-specific geographic field for MySQL.
- """
-
- def _geom_index(self, style, db_table):
- """
- Creates a spatial index for the geometry column. If MyISAM tables are
- used an R-Tree index is created, otherwise a B-Tree index is created.
- Thus, for best spatial performance, you should use MyISAM tables
- (which do not support transactions). For more information, see Ch.
- 16.6.1 of the MySQL 5.0 documentation.
- """
-
- # Getting the index name.
- idx_name = '%s_%s_id' % (db_table, self.column)
-
- sql = (style.SQL_KEYWORD('CREATE SPATIAL INDEX ') +
- style.SQL_TABLE(qn(idx_name)) +
- style.SQL_KEYWORD(' ON ') +
- style.SQL_TABLE(qn(db_table)) + '(' +
- style.SQL_FIELD(qn(self.column)) + ');')
- return sql
-
- def post_create_sql(self, style, db_table):
- """
- Returns SQL that will be executed after the model has been
- created.
- """
- # Getting the geometric index for this Geometry column.
- if self.spatial_index:
- return (self._geom_index(style, db_table),)
- else:
- return ()
-
- def db_type(self):
- "The OpenGIS name is returned for the MySQL database column type."
- return self.geom_type
-
- def get_placeholder(self, value):
- """
- The placeholder here has to include MySQL's WKT constructor. Because
- MySQL does not support spatial transformations, there is no need to
- modify the placeholder based on the contents of the given value.
- """
- return '%s(%%s)' % GEOM_FROM_TEXT