Ticket #5568: patch-drop_indexes.diff

django/core/management/commands/sqldropindexes.py

@@ +1 @@
+from django.core.management.base import AppCommand
+
+class Command(AppCommand):
+    help = "Prints the DROP INDEX SQL statements for the given app module name(s)."
+
+    output_transaction = True
+
+    def handle_app(self, app, **options):
+        from django.core.management.sql import sql_drop_indexes
+        return '\n'.join(sql_drop_indexes(app, self.style))

django/core/management/sql.py

@@ -236 +236 @@
         output.extend(sql_indexes_for_model(model, style))
     return output
 
+def sql_drop_indexes(app, style):
+    "Returns a list of the DROP INDEX SQL statements for all models in the given app."
+    from django.db import models
+    output = []
+    for model in models.get_models(app):
+        output.extend(sql_drop_indexes_for_model(model, style))
+    return output
+
 def sql_all(app, style):
     "Returns a list of CREATE TABLE SQL, initial-data inserts, and CREATE INDEX SQL for the given module."
     return sql_create(app, style) + sql_custom(app) + sql_indexes(app, style)
@@ -444 +452 @@
             )
     return output
 
+def sql_drop_indexes_for_model(model, style):
+    "Returns the DROP INDEX SQL statements for a single model"
+    from django.db import connection
+    output = []
+
+    qn = connection.ops.quote_name
+    for f in model._meta.fields:
+        if f.db_index and not ((f.primary_key or f.unique) and connection.features.autoindexes_primary_keys):
+            tablespace = f.db_tablespace or model._meta.db_tablespace
+            if tablespace and connection.features.supports_tablespaces:
+                tablespace_sql = ' ' + connection.ops.tablespace_sql(tablespace)
+            else:
+                tablespace_sql = ''
+            output.append(
+                style.SQL_KEYWORD('DROP INDEX') + ' ' + \
+                style.SQL_TABLE(qn('%s_%s' % (model._meta.db_table, f.column))) + ';'
+            )
+    return output
+
 def emit_post_sync_signal(created_models, verbosity, interactive):
     from django.db import models
     from django.dispatch import dispatcher