Removing Object With Objectid From Array In Mongoose/mongodb

How do I go into the _carts array and delete the object with _id of '1'?? Also, am I using the update and $pull right with the ObjectId?? Assuming that the user _id and cart _id ar

Solution 1:

Your problem is here in update function

User.update(
        {'_id':user_id}, // you not need to use ObjectId here
        { $pull: { '_carts': { _id: cart_id }}},
        function(err,result){
    // can you give here the output of console.log(result);
   }
    )
    User.save();

Solution 2:

After closely looking at your problem what I found is something wrong with your User Model schema. So I have updated the answer accordingly.

In your User model the _carts filed has following schema you have used.

_carts: [{
        type: Schema.Types.ObjectId,
        ref: 'cart'
    }]

So as per your schema the array contains Objectids which has reference to cart model. (example: _carts:[ObjectId1,ObjectId2,Object3 ....])

But in your Seed data the document is

constUser1= {
     _id:'1234',
     _carts: [{
              _id:'1',
              _product: {},
              quantity:2
              }, 
              {
              _id:'2',
              _product: {},
              quantity:4
              }],
        admin:false
    }

which has objects in _carts array. As per schema it should be ObjectIds not Objects

Now as per your query { $pull: { '_carts': { _id: (cart_id) }}} you are trying to pull the document which has _id = cart_id. But there is no _id available in your _carts schema .

So here is my analysis. If you want store cart details in carts array. Then your User model's schema should be

_carts : [cartSchema]

Otherwise your update query has no problem. It should work.

The error you have mentioned is due to mongodb connection issue. Please follow updated Mongoose doc on how to connect Mongodb properly.