'MongooseError: Cast to embedded failed for value

I'm creating a mongoose Schema but I'm getting a MongooseError.

This is my Scheme:

let RestaurantSchema = new Schema({
    ratings: {
        type: [{
            id: Number,
            value: Number,
            _id: false
        }],
        default: [
            { id: 1, value: 0 },
            { id: 2, value: 0 },
            { id: 3, value: 0 },
            { id: 4, value: 0 },
            { id: 5, value: 0 }
        ]
    },
    menu: [{
        ratings: {
            type: [{
                id: Number,
                value: Number,
                _id: false
            }],
            default: [
                { id: 1, value: 0 },
                { id: 2, value: 0 },
                { id: 3, value: 0 },
                { id: 4, value: 0 },
                { id: 5, value: 0 }
            ]
        }
    }]
})

And this is the error I'm getting:

/var/app/node_modules/mongoose/lib/schema/documentarray.js:322
             throw new CastError('embedded', valueInErrorMessage,
             ^
 MongooseError: Cast to embedded failed for value "{ id: 5, value: 0 }" at path "rating"
     at CastError (/var/app/node_modules/mongoose/lib/error/cast.js:26:11)
     at DocumentArray.cast (/var/app/node_modules/mongoose/lib/schema/documentarray.js:322:19)
     at DocumentArray.SchemaType.getDefault (/var/app/node_modules/mongoose/lib/schematype.js:616:23)
     at EmbeddedDocument.Document.$__buildDoc (/var/app/node_modules/mongoose/lib/document.js:265:22)
     at EmbeddedDocument.Document (/var/app/node_modules/mongoose/lib/document.js:61:20)
     at EmbeddedDocument [as constructor] (/var/app/node_modules/mongoose/lib/types/embedded.js:31:12)
     at new EmbeddedDocument (/var/app/node_modules/mongoose/lib/schema/documentarray.js:70:17)
     at DocumentArray.SchemaArray [as constructor] (/var/app/node_modules/mongoose/lib/schema/array.js:67:21)
     at new DocumentArray (/var/app/node_modules/mongoose/lib/schema/documentarray.js:31:13)
     at Function.Schema.interpretAsType (/var/app/node_modules/mongoose/lib/schema.js:643:16)
     at Schema.path (/var/app/node_modules/mongoose/lib/schema.js:563:29)
     at Schema.add (/var/app/node_modules/mongoose/lib/schema.js:445:12)
     at new Schema (/var/app/node_modules/mongoose/lib/schema.js:99:10)
     at Object.<anonymous> (/var/app/models/restaurant.js:12:24)
     at Module._compile (module.js:571:32)
     at Object.Module._extensions..js (module.js:580:10)
     at Module.load (module.js:488:32)
     at tryModuleLoad (module.js:447:12)
     at Function.Module._load (module.js:439:3)
     at Module.require (module.js:498:17)
     at require (internal/module.js:20:19)
     at Object.<anonymous> (/var/app/controllers/restaurant.js:6:18)
     at Module._compile (module.js:571:32)
     at Object.Module._extensions..js (module.js:580:10)
     at Module.load (module.js:488:32)
     at tryModuleLoad (module.js:447:12)
     at Function.Module._load (module.js:439:3)
     at Module.require (module.js:498:17)

What am I doing wrong?

Solution 1:^[1]

Not necessarily related to the situation above, but one in which this error arises (as happened to me) is when the Schema expects an object, but the code tries to save to an array. I.e., if:

var MySubSchema = new Schema(
    {
        type: String,
        meta: String
    }
)

var MySchema = new Schema(
    subSchema: MySubSchema,
    otherSubSchema: OtherSubSchema 
)

but the route/controller to save the data is as follows:

var mySchemaObj = new MySchema(
  {mySubSchema: [new MySubSchema(  //<-- Shouldn't have array "[" here
       {
          type: "foo",
          meta: "bar"
       }
    )]
  } 
)

. . . 
. . . 

mySchemaObj.save() . . . // <-- This will throw the "Cast to Embedded Failed" error, because MySchema expects a single MySubSchema Object, but the code above instantiates MySubSchema in an array.

Solution 2:^[2]

This may be late but, for others who are facing the same problem as me.
Let suppose say, i have a schema something like this

const sampleSchema = new Schema({
   productId: Number
   productName: String
})

And, this is the data that I would like to store in it.

{
   productId:"product_1000",
   productName: "sampleProduct"
}

Now, when i try to store the data in it, I am gonna get the CastError: Cast to embedded failed for value.
Did you get the mistake that I did ? Let me elaborate, In the schema, the productId is an Number and the data that i am trying to store is a String. To make this work, we have to change the type of the productId from Number to String.

So, if you're receiving an cast error, check the schema once again . This is a simple mistake but cost me a good amount of time to find out the issue.

Solution 3:^[3]

Just if anyone else has this same problem as me: I had this issue when I was setting my object _id with uuidv4() in my react project, so when my API received this object with this _id containing a long v4() string, it was making my mongoose throw this exception when it tried to persist the object:

(part of the exception)

  path: 'middleComponents',
  reason: CastError: Cast to ObjectId failed for value "f41b7983-09b8-4463-bf5b-e59a8f7a19f6" (type string) at path "_id"
      at ObjectId.cast (E:\path-to-project\node_modules\mongoose\lib\schema\objectid.js:248:11)
      at ObjectId.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
      at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1309:20)
      at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1058:16)
      at EmbeddedDocument.Document (E:\path-to-project\node_modules\mongoose\lib\document.js:148:12)
      at EmbeddedDocument [as constructor] (E:\path-to-project\node_modules\mongoose\lib\types\embedded.js:47:12)
      at new EmbeddedDocument (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:116:17)
      at DocumentArrayPath.cast (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:462:22)
      at DocumentArrayPath.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
      at DocumentArrayPath.SchemaType._castForQuery (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1601:15)
      at DocumentArrayPath.SchemaType.castForQueryWrapper (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1563:22)
      at castUpdateVal (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:546:19)
      at walkUpdatePath (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:366:24)
      at castUpdate (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:96:7)
      at model.Query._castUpdate (E:\path-to-project\node_modules\mongoose\lib\query.js:4721:10)
      at castDoc (E:\path-to-project\node_modules\mongoose\lib\query.js:4751:18) {
    stringValue: '"f41b7983-09b8-4463-bf5b-e59a8f7a19f6"',
    messageFormat: undefined,
    kind: 'ObjectId',
    value: 'f41b7983-09b8-4463-bf5b-e59a8f7a19f6',
    path: '_id',
    reason: Error: Argument passed in must be a single String of 12 bytes or a string of 24 hex characters
        at new ObjectID (E:\path-to-project\node_modules\bson\lib\bson\objectid.js:59:11)
        at castObjectId (E:\path-to-project\node_modules\mongoose\lib\cast\objectid.js:25:12)
        at ObjectId.cast (E:\path-to-project\node_modules\mongoose\lib\schema\objectid.js:246:12)
        at ObjectId.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
        at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1309:20)
        at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1058:16)
        at EmbeddedDocument.Document (E:\path-to-project\node_modules\mongoose\lib\document.js:148:12)
        at EmbeddedDocument [as constructor] (E:\path-to-project\node_modules\mongoose\lib\types\embedded.js:47:12)
        at new EmbeddedDocument (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:116:17)
        at DocumentArrayPath.cast (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:462:22)
        at DocumentArrayPath.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
        at DocumentArrayPath.SchemaType._castForQuery (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1601:15)
        at DocumentArrayPath.SchemaType.castForQueryWrapper (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1563:22)
        at castUpdateVal (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:546:19)
        at walkUpdatePath (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:366:24)
        at castUpdate (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:96:7),
    valueType: 'string'
  },
  valueType: 'string'

Solution 4:^[4]

In my case the req.body did not match the pre defined mongoose schema, I was trying to save an array of ObjectId, The req.body was:

{
   cart: ["60d9b457a6c11f2a3818051a"]
}

But the mongoose schema was

cart: [
   {
      product: {
         type: mongoose.Schema.Types.ObjectId,
         ref: 'products'
      }
   }
]

I changed that mongoose schema like this ? to make it work:

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

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Crowdpleasr
Solution 2
Solution 3	Marcelino Borges
Solution 4	kritiz

'MongooseError: Cast to embedded failed for value

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]

Solution 4:^[4]