diff --git a/app.js b/app.js
index 0feecd7..dce2920 100644
--- a/app.js
+++ b/app.js
@@ -16,6 +16,7 @@ const dbhog = require('./dbhog')
 
 const PORT = process.env.PORT || 4000;
 
+var userRouter = require('./routes/users');
 
 var indexRouter = require('./routes/index');
 var valuelistRouter = require('./routes/valuelist');
@@ -57,6 +58,7 @@ app.use('/', indexRouter);
 app.use('/wl', valuelistRouter);
 app.use('/vl', valuelistRouter);
 app.use('/recepies', recepieRouter);
+app.use('/users', userRouter);
 
 app.use('/api/v1/person', personRouter);
 app.use('/api/v1/schueler', schuelerRouter);
diff --git a/db/index.js b/db/index.js
index 311b2e9..c03e160 100644
--- a/db/index.js
+++ b/db/index.js
@@ -1,7 +1,7 @@
 // SQL-Class
 // Author: Thomas Mack
 
-const DEBUG = false;
+const DEBUG = true;
 
 const { Pool } = require('pg');
 const pool = new Pool({
diff --git a/routes/recepieIngredients.js b/routes/recepieIngredients.js
index 5f253a0..5641ad4 100644
--- a/routes/recepieIngredients.js
+++ b/routes/recepieIngredients.js
@@ -79,10 +79,19 @@ router.get('/:ingredientId', function(req, res, next) {
 
 router.put('/:ingredientId', function(req, res, next) {
   let recepieIngredient = req.body.recepieIngredients[0];
+  //console.log(recepieIngredient.menge>0);
+  let menge = null;
+  if (recepieIngredient.menge>0) {
+    menge = recepieIngredient.menge;
+
+  } else {
+    menge = null;
+  }
+
   let query =  "UPDATE rezept_zutat set menge = $1, einheit = $2, zutat =$3, beschreibung =$4"+
             " WHERE id = "+req.ingredientId +
             " returning *";
-  let values = [recepieIngredient.menge, recepieIngredient.einheit, recepieIngredient.zutat, recepieIngredient.beschreibung];
+  let values = [menge, recepieIngredient.einheit, recepieIngredient.zutat, recepieIngredient.beschreibung];
 
   if(DEBUG) console.log(query);
   req.db.query(query, values, (err, rs) => {