Fixed #800 -- Fixed bug in treatement of underscores and percent signs in SQLite…

Fixed #800 -- Fixed bug in treatement of underscores and percent signs in SQLite backend. In order to do this, changed OPERATOR_MAPPING in DB backends to include a format string of the field value, because ESCAPE comes after the field value.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1326 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/db/backends/ado_mssql.py

@@ -116,19 +116,19 @@ def get_relations(cursor, table_name):
     raise NotImplementedError
 
 OPERATOR_MAPPING = {
-    'exact': '=',
-    'iexact': 'LIKE',
-    'contains': 'LIKE',
-    'icontains': 'LIKE',
-    'ne': '!=',
-    'gt': '>',
-    'gte': '>=',
-    'lt': '<',
-    'lte': '<=',
-    'startswith': 'LIKE',
-    'endswith': 'LIKE',
-    'istartswith': 'LIKE',
-    'iendswith': 'LIKE',
+    'exact': '= %s',
+    'iexact': 'LIKE %s',
+    'contains': 'LIKE %s',
+    'icontains': 'LIKE %s',
+    'ne': '!= %s',
+    'gt': '> %s',
+    'gte': '>= %s',
+    'lt': '< %s',
+    'lte': '<= %s',
+    'startswith': 'LIKE %s',
+    'endswith': 'LIKE %s',
+    'istartswith': 'LIKE %s',
+    'iendswith': 'LIKE %s',
 }
 
 DATA_TYPES = {

django/core/db/backends/mysql.py

@@ -128,19 +128,19 @@ def get_relations(cursor, table_name):
     raise NotImplementedError
 
 OPERATOR_MAPPING = {
-    'exact': '=',
-    'iexact': 'LIKE',
-    'contains': 'LIKE BINARY',
-    'icontains': 'LIKE',
-    'ne': '!=',
-    'gt': '>',
-    'gte': '>=',
-    'lt': '<',
-    'lte': '<=',
-    'startswith': 'LIKE BINARY',
-    'endswith': 'LIKE BINARY',
-    'istartswith': 'LIKE',
-    'iendswith': 'LIKE',
+    'exact': '= %s',
+    'iexact': 'LIKE %s',
+    'contains': 'LIKE BINARY %s',
+    'icontains': 'LIKE %s',
+    'ne': '!= %s',
+    'gt': '> %s',
+    'gte': '>= %s',
+    'lt': '< %s',
+    'lte': '<= %s',
+    'startswith': 'LIKE BINARY %s',
+    'endswith': 'LIKE BINARY %s',
+    'istartswith': 'LIKE %s',
+    'iendswith': 'LIKE %s',
 }
 
 # This dictionary maps Field objects to their associated MySQL column

django/core/db/backends/postgresql.py

@@ -133,19 +133,19 @@ Database.register_type(Database.new_type((1114,1184), "TIMESTAMP", typecasts.typ
 Database.register_type(Database.new_type((16,), "BOOLEAN", typecasts.typecast_boolean))
 
 OPERATOR_MAPPING = {
-    'exact': '=',
-    'iexact': 'ILIKE',
-    'contains': 'LIKE',
-    'icontains': 'ILIKE',
-    'ne': '!=',
-    'gt': '>',
-    'gte': '>=',
-    'lt': '<',
-    'lte': '<=',
-    'startswith': 'LIKE',
-    'endswith': 'LIKE',
-    'istartswith': 'ILIKE',
-    'iendswith': 'ILIKE',
+    'exact': '= %s',
+    'iexact': 'ILIKE %s',
+    'contains': 'LIKE %s',
+    'icontains': 'ILIKE %s',
+    'ne': '!= %s',
+    'gt': '> %s',
+    'gte': '>= %s',
+    'lt': '< %s',
+    'lte': '<= %s',
+    'startswith': 'LIKE %s',
+    'endswith': 'LIKE %s',
+    'istartswith': 'ILIKE %s',
+    'iendswith': 'ILIKE %s',
 }
 
 # This dictionary maps Field objects to their associated PostgreSQL column

django/core/db/backends/sqlite3.py

@@ -131,20 +131,23 @@ def get_relations(cursor, table_name):
 
 # Operators and fields ########################################################
 
+# SQLite requires LIKE statements to include an ESCAPE clause if the value
+# being escaped has a percent or underscore in it.
+# See http://www.sqlite.org/lang_expr.html for an explanation.
 OPERATOR_MAPPING = {
-    'exact':        '=',
-    'iexact':       'LIKE',
-    'contains':     'LIKE',
-    'icontains':    'LIKE',
-    'ne':           '!=',
-    'gt':           '>',
-    'gte':          '>=',
-    'lt':           '<',
-    'lte':          '<=',
-    'startswith':   'LIKE',
-    'endswith':     'LIKE',
-    'istartswith':  'LIKE',
-    'iendswith':    'LIKE',
+    'exact': '= %s',
+    'iexact': "LIKE %s ESCAPE '\\'",
+    'contains': "LIKE %s ESCAPE '\\'",
+    'icontains': "LIKE %s ESCAPE '\\'",
+    'ne': '!= %s',
+    'gt': '> %s',
+    'gte': '>= %s',
+    'lt': '< %s',
+    'lte': '<= %s',
+    'startswith': "LIKE %s ESCAPE '\\'",
+    'endswith': "LIKE %s ESCAPE '\\'",
+    'istartswith': "LIKE %s ESCAPE '\\'",
+    'iendswith': "LIKE %s ESCAPE '\\'",
 }
 
 # SQLite doesn't actually support most of these types, but it "does the right

django/core/meta/__init__.py

@@ -1127,7 +1127,7 @@ def _get_where_clause(lookup_type, table_prefix, field_name, value):
         table_prefix = db.db.quote_name(table_prefix[:-1])+'.'
     field_name = db.db.quote_name(field_name)
     try:
-        return '%s%s %s %%s' % (table_prefix, field_name, db.OPERATOR_MAPPING[lookup_type])
+        return '%s%s %s' % (table_prefix, field_name, (db.OPERATOR_MAPPING[lookup_type] % '%s'))
     except KeyError:
         pass
     if lookup_type == 'in':