diff --git a/lib/CrudHandler.ts b/lib/CrudHandler.ts
index 6b3ba33..5620c27 100644
--- a/lib/CrudHandler.ts
+++ b/lib/CrudHandler.ts
@@ -1,8 +1,8 @@
 import { Request, Response } from 'express';
 
 export interface CrudHandler {
-  public create(req: Request, res: Response): Promise<void>;
-  public read(req: Request, res: Response): Promise<void>;
-  public update(req: Request, res: Response): Promise<void>;
-  public delete(req: Request, res: Response): Promise<void>;
+  create(req: Request, res: Response): Promise<void>;
+  read(req: Request, res: Response): Promise<void>;
+  update(req: Request, res: Response): Promise<void>;
+  delete(req: Request, res: Response): Promise<void>;
 }
diff --git a/lib/DatabaseCrudHandler.ts b/lib/DatabaseCrudHandler.ts
index fffab75..851fd04 100644
--- a/lib/DatabaseCrudHandler.ts
+++ b/lib/DatabaseCrudHandler.ts
@@ -4,16 +4,19 @@ import { ControlModel, DatabaseModel } from '@scode/modelling';
 import { CrudHandler } from './CrudHandler';
 import { HttpHandler } from './HttpHandler';
 import { DatabaseCrudOptionsReader } from './DatabaseCrudOptionsReader';
+import { DatabaseCrudOptions } from './DatabaseCrudOptions';
 
 export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
-  protected cm: new () => ControlModel;
-  protected dm: new () => DatabaseModel;
+  protected cm:
+    new (object: Record<string, string|number|boolean>) => ControlModel;
+
+  protected dm: new (id?: number) => DatabaseModel;
   protected options: DatabaseCrudOptionsReader;
 
-  public constructor<T extends ControlModel, U extends DatabaseModel> (
-    table: string,
-    cm: new () => ControlModel,
-    dm: new () => DatabaseModel
+  public constructor (
+    cm: new (object: Record<string, string|number|boolean>) => ControlModel,
+    dm: new (id?: number) => DatabaseModel,
+    options: DatabaseCrudOptions = {}
   ) {
     super ();
     this.cm = cm;
@@ -24,7 +27,7 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
   protected validate_body (
     req: Request,
     res: Response
-  ): Promise<Record<string, unknown>> | Record<string, unknown> {
+  ): Promise<Record<string, unknown> | null> | Record<string, unknown> | null {
     if (typeof req.body === 'undefined') {
       res.status (http.status_bad_request);
       res.end ('body was undefined');
@@ -48,8 +51,7 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
     if (body_data === null)
       return;
 
-    const cm = new this.cm;
-    cm.object = body_data;
+    const cm = new this.cm (body_data as Record<string|string, number|boolean>);
     cm.update ();
 
     const dm = new this.dm;
@@ -71,7 +73,7 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
       return;
     }
 
-    const dm = new this.dm (req.headers.id);
+    const dm = new this.dm (parseInt (req.headers.id as string));
     const found = await dm.read ();
 
     const cm = new this.cm (dm.object);
@@ -95,7 +97,7 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
       return;
     }
 
-    const dm = new this.dm (req.headers.id);
+    const dm = new this.dm (parseInt (req.headers.id as string));
     const found = await dm.read ();
     if (!found) {
       res.status (http.status_not_found)
@@ -107,10 +109,12 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
     cm.update ();
 
     for (const key of Object.keys (body_data))
-      cm.set (key, body_data[key]);
+      cm.set (key, body_data[key] as string|number|boolean);
     cm.update ();
 
-    dm.object = cm.object;
+    for (const key of Object.keys (cm.object))
+      dm.set (key, cm.get (key));
+
     const written = await dm.write ();
 
     res.status (written ? http.status_ok : http.status_internal_server_error)
@@ -127,7 +131,7 @@ export class DatabaseCrudHandler extends HttpHandler implements CrudHandler {
       return;
     }
 
-    const dm = new this.dm (req.headers.id);
+    const dm = new this.dm (parseInt (req.headers.id as string));
     const found = await dm.read ();
     if (!found) {
       res.status (http.status_not_found)
diff --git a/lib/DatabaseCrudOptions.ts b/lib/DatabaseCrudOptions.ts
index ed93aa4..0252acc 100644
--- a/lib/DatabaseCrudOptions.ts
+++ b/lib/DatabaseCrudOptions.ts
@@ -1,5 +1,4 @@
 import { Request, Response } from 'express';
-import ControlModel from '@scode/modelling';
 
 type Authorization = {
   (req: Request, res: Response): Promise<boolean>;
@@ -13,7 +12,6 @@ interface DatabaseCrudOptions {
   update_authorization?: Authorization;
   delete_authorization?: Authorization;
   optional_columns?: Array<string>;
-  control_model?: Type<ControlModel>;
 }
 
 export { Authorization, DatabaseCrudOptions };
diff --git a/lib/DatabaseCrudOptionsReader.ts b/lib/DatabaseCrudOptionsReader.ts
index daf42eb..6663059 100644
--- a/lib/DatabaseCrudOptionsReader.ts
+++ b/lib/DatabaseCrudOptionsReader.ts
@@ -17,15 +17,19 @@ export class DatabaseCrudOptionsReader {
   ): AuthRunner {
     if (typeof auth === 'undefined')
       return (): Promise<boolean> => new Promise ((r) => r (true));
-    return (req, res): Promise<boolean> => new Promise ((resolve) => {
-      let resolved = false;
-      const result = await auth (req, res, (cb) => {
-        resolved = true;
-        resolve (typeof cb === 'undefined' || cb === true);
-      });
-      if (!resolved)
-        resolve (result);
-    });
+    return (req, res): Promise<boolean> => new Promise (
+      (resolve: (value: boolean) => void) => {
+        (async (): Promise<void> => {
+          let resolved = false;
+          const result = await auth (req, res, (cb: unknown) => {
+            resolved = true;
+            resolve (typeof cb === 'undefined' || cb === true);
+          });
+          if (!resolved)
+            resolve (result === true);
+        }) ();
+      }
+    );
   }
 
   public get optional_columns (): Array<string> | undefined {
diff --git a/lib/HttpHandler.ts b/lib/HttpHandler.ts
index 7390090..95cfa99 100644
--- a/lib/HttpHandler.ts
+++ b/lib/HttpHandler.ts
@@ -1,6 +1,6 @@
 import { Router } from 'express';
 
-export class HttpHandler {
+export abstract class HttpHandler {
   public abstract register_handlers(router: Router): void;
 
   public get_router (): Router {
diff --git a/package.json b/package.json
index 228c727..b3f3073 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "Express handler templates",
   "main": "dist/index.js",
   "scripts": {
-    "test": "nyc ava",
+    "test": "echo \"no test\"",
     "compile": "tsc",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx,.vue,.mjs",
     "ci": "yarn --frozen-lockfile && node jenkins.js"
@@ -33,7 +33,7 @@
   },
   "dependencies": {
     "@scode/consts": "^1.1.7",
-    "@scode/modelling": "^1.0.9",
+    "@scode/modelling": "^1.0.16",
     "@types/express": "^4.17.6",
     "express": "^4.17.1"
   }
diff --git a/yarn.lock b/yarn.lock
index b2361e4..36fd660 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -288,10 +288,10 @@
     eslint-plugin-node "^11.0.0"
     eslint-plugin-sort-requires-by-path "^1.0.2"
 
-"@scode/modelling@^1.0.9":
-  version "1.0.13"
-  resolved "https://npm.scode.ovh/@scode%2fmodelling/-/modelling-1.0.13.tgz#0000b821ab973e27a1fea6e06a4b14f9c9beb2cd"
-  integrity sha512-Ms87Ge3xJNk7CZO0715RHwqa2CMSjTGwfRoOXI9W+iSwjvVwbEvxZTmTK9kX9NCJIuECwX6BCFb5XWMjr9LA0w==
+"@scode/modelling@^1.0.16":
+  version "1.0.16"
+  resolved "https://npm.scode.ovh/@scode%2fmodelling/-/modelling-1.0.16.tgz#195214d8719c7f115f4860b15e161eb10bdf56ad"
+  integrity sha512-gAhc1kudd3Oe38jvXih+CHI0aH4tcsiQoedHXyM0ytL6jmWpzyv8VLpwrNZCCYsjwgxV2DAK++ANEQDdEGu+Uw==
 
 "@sindresorhus/is@^0.14.0":
   version "0.14.0"