diff --git a/lib/snippets/database/classes/PatchAction.ts b/lib/snippets/database/classes/PatchAction.ts
index 185ebf2..2f4799b 100644
--- a/lib/snippets/database/classes/PatchAction.ts
+++ b/lib/snippets/database/classes/PatchAction.ts
@@ -9,4 +9,5 @@ import { Database } from './Database';
 
 export interface PatchAction {
   apply(db: Database): void;
+  assign_object(obj: Record<string, unknown>):void;
 }
diff --git a/lib/snippets/database/index.ts b/lib/snippets/database/index.ts
index 53741a3..90a666d 100644
--- a/lib/snippets/database/index.ts
+++ b/lib/snippets/database/index.ts
@@ -7,6 +7,7 @@
 
 import { Snippet } from '../../Snippet';
 import { MainMenu } from './menu/MainMenu';
+import { Database as DatabaseClass } from './classes/Database';
 
 export default class Database implements Snippet {
   public is_active (): boolean {
@@ -14,7 +15,7 @@ export default class Database implements Snippet {
   }
 
   public async start (): Promise<void> {
-    await (new MainMenu)
+    await (new MainMenu (new DatabaseClass))
       .run ();
   }
 }
diff --git a/lib/snippets/database/menu/MainMenu.ts b/lib/snippets/database/menu/MainMenu.ts
index 24f67c0..be26786 100644
--- a/lib/snippets/database/menu/MainMenu.ts
+++ b/lib/snippets/database/menu/MainMenu.ts
@@ -11,7 +11,9 @@ import { Menu } from './Menu';
 export class MainMenu extends Menu {
   public constructor (db: Database) {
     super ('Snippeteer Database');
-    this.register_option ('quit', () => { /* noop */ });
+    this.register_option ('quit', () => {
+      // noop
+    });
     this.register_option ('create table', () => {
       console.log ('table');
     });
diff --git a/lib/snippets/database/patch_actions/ActionFactory.ts b/lib/snippets/database/patch_actions/ActionFactory.ts
new file mode 100644
index 0000000..704afb9
--- /dev/null
+++ b/lib/snippets/database/patch_actions/ActionFactory.ts
@@ -0,0 +1,16 @@
+import { PatchAction } from '../classes/PatchAction';
+
+export class ActionFactory {
+  private static _actions: Record<string, (json:string)=>PatchAction> = {};
+
+  public static get (name:string, json:string): PatchAction {
+    return this._actions[name] (json);
+  }
+
+  public static register (
+    name:string,
+    constr: (json:string)=>PatchAction
+  ):void {
+    this._actions[name] = constr;
+  }
+}
diff --git a/lib/snippets/database/patch_actions/AddTable.ts b/lib/snippets/database/patch_actions/AddTable.ts
new file mode 100644
index 0000000..cf629f3
--- /dev/null
+++ b/lib/snippets/database/patch_actions/AddTable.ts
@@ -0,0 +1,29 @@
+import { Persistent } from '@sapphirecode/modelling';
+import { PatchAction } from '../classes/PatchAction';
+import { Database } from '../classes/Database';
+import { Table } from '../classes/Table';
+import { Column } from '../classes/Column';
+import { ColumnType } from '../classes/ColumnType';
+
+export class AddTable extends Persistent implements PatchAction {
+  public get name ():string {
+    return this.get ('name') as string;
+  }
+
+  public constructor (name:string) {
+    super ();
+    this.properties.name = 'string';
+
+    this.set ('name', name);
+  }
+
+  public apply (db: Database):void {
+    if (typeof db.get_table (this.name) !== 'undefined')
+      throw new Error ('table already exists');
+
+    const table = new Table (this.name);
+    table.columns.push (new Column ('id', ColumnType.increments));
+
+    db.tables.push (table);
+  }
+}
diff --git a/lib/snippets/database/patch_actions/PatchActions.ts b/lib/snippets/database/patch_actions/PatchActions.ts
index 248519b..2c5af90 100644
--- a/lib/snippets/database/patch_actions/PatchActions.ts
+++ b/lib/snippets/database/patch_actions/PatchActions.ts
@@ -5,16 +5,46 @@
  * Created by Timo Hocker <timo@scode.ovh>, June 2020
  */
 
-export { RenameColumn } from './RenameColumn';
-export { AddColumn } from './AddColumn';
-export { DropColumn } from './DropColumn';
-export { AddRelation } from './AddRelation';
-export { DropRelation } from './DropRelation';
-export { SetColumnType } from './SetColumnType';
-export { AddTable } from './AddTable';
-export { DropTable } from './DropTable';
-export { RenameTable } from './RenameTable';
-export { InsertData } from './InsertData';
-export { UpdateData } from './UpdateData';
-export { MutateDate } from './MutateDate';
-export { DeleteData } from './DeleteData';
+import { PatchAction } from '../classes/PatchAction';
+import { ActionFactory } from './ActionFactory';
+import { RenameColumn } from './RenameColumn';
+import { AddTable } from './AddTable';
+
+
+/*
+ * export { AddColumn } from './AddColumn';
+ * export { DropColumn } from './DropColumn';
+ * export { AddRelation } from './AddRelation';
+ * export { DropRelation } from './DropRelation';
+ * export { SetColumnType } from './SetColumnType';
+ * export { DropTable } from './DropTable';
+ * export { RenameTable } from './RenameTable';
+ * export { InsertData } from './InsertData';
+ * export { UpdateData } from './UpdateData';
+ * export { MutateDate } from './MutateDate';
+ * export { DeleteData } from './DeleteData';
+ */
+
+function assign_json (patch:PatchAction, json:string):PatchAction {
+  const obj = JSON.parse (json);
+  patch.assign_object (obj);
+  return patch;
+}
+
+function init ():void {
+  ActionFactory.register (
+    'rename_column',
+    (json:string) => assign_json (new RenameColumn ('', '', ''), json)
+  );
+
+  ActionFactory.register (
+    'add_table',
+    (json:string) => assign_json (new AddTable (''), json)
+  );
+}
+
+export {
+  init,
+  RenameColumn,
+  AddTable
+};
diff --git a/lib/snippets/database/patch_actions/RenameColumn.ts b/lib/snippets/database/patch_actions/RenameColumn.ts
index db797f8..a1cf8e8 100644
--- a/lib/snippets/database/patch_actions/RenameColumn.ts
+++ b/lib/snippets/database/patch_actions/RenameColumn.ts
@@ -11,29 +11,26 @@ import { Database } from '../classes/Database';
 
 export class RenameColumn extends Persistent implements PatchAction {
   public get table (): string {
-    return this.get ('table');
+    return this.get ('table') as string;
   }
 
   public get column (): string {
-    return this.get ('column');
+    return this.get ('column') as string;
   }
 
   public get new_name (): string {
-    return this.get ('new_name');
+    return this.get ('new_name') as string;
   }
 
   public constructor (
     column: string,
-    new_name: string|null = null,
-    table: string|null = null
+    new_name: string,
+    table: string
   ) {
-    this.properties = { column: 'string', table: 'string', new_name: 'string' };
-
-    if (new_name === null || table === null) {
-      const parsed = JSON.parse (column);
-      this.assign_object (parsed);
-      return;
-    }
+    super ();
+    this.properties.column = 'string';
+    this.properties.table = 'string';
+    this.properties.new_name = 'string';
 
     this.set ('column', column);
     this.set ('new_name', new_name);