Ticket #9525: django_foreign_key.patch

db/backends/creation.py

@@ -56 +56 @@
                 # We must specify the index tablespace inline, because we
                 # won't be generating a CREATE INDEX statement for this field.
                 field_output.append(self.connection.ops.tablespace_sql(tablespace, inline=True))
-            if f.rel:
+            if f.rel and f.create_constraint:
                 ref_output, pending = self.sql_for_inline_foreign_key_references(f, known_models, style)
                 if pending:
                     pr = pending_references.setdefault(f.rel.to, []).append((model, f))
@@ -93 +93 @@
     def sql_for_inline_foreign_key_references(self, field, known_models, style):
         "Return the SQL snippet defining the foreign key reference for a field"
         qn = self.connection.ops.quote_name
-        if field.rel.to in known_models:
+        if field.rel.to in known_models and field.create_constraint:
             output = [style.SQL_KEYWORD('REFERENCES') + ' ' + \
                 style.SQL_TABLE(qn(field.rel.to._meta.db_table)) + ' (' + \
                 style.SQL_FIELD(qn(field.rel.to._meta.get_field(field.rel.field_name).column)) + ')' +

db/models/fields/related.py

@@ -641 +641 @@
             limit_choices_to=kwargs.pop('limit_choices_to', None),
             lookup_overrides=kwargs.pop('lookup_overrides', None),
             parent_link=kwargs.pop('parent_link', False))
+        self.create_constraint = kwargs.pop('create_constraint',True)
         Field.__init__(self, **kwargs)
 
         self.db_index = True