Add migration to finally remove the last playerdb_ tables

evennia/typeclasses/migrations/0010_delete_old_player_tables.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.3 on 2017-07-13 18:47
+from __future__ import unicode_literals
+
+from django.db import migrations, OperationalError, connection
+
+
+def _table_exists(db_cursor, tablename):
+    "Returns bool if table exists or not"
+    sql_check_exists = "SELECT * from %s;" % tablename
+    try:
+        db_cursor.execute(sql_check_exists)
+        return True
+    except OperationalError:
+        return False
+
+
+def _drop_table(db_cursor, table_name):
+    if _table_exists(db_cursor, table_name):
+        sql_drop = "DROP TABLE %s;" % table_name
+        db_cursor.execute(sql_drop)
+
+
+def drop_tables(apps, schema_migrator):
+    db_cursor = connection.cursor()
+    _drop_table(db_cursor, "players_playerdb")
+    _drop_table(db_cursor, "players_playerdb_db_attributes")
+    _drop_table(db_cursor, "players_playerdb_db_tags")
+    _drop_table(db_cursor, "players_playerdb_groups")
+    _drop_table(db_cursor, "players_playerdb_user_permissions")
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('typeclasses', '0009_rename_player_cmdsets_typeclasses'),
+    ]
+
+    operations = [
+        migrations.RunPython(drop_tables)
+    ]