ValidationError: User validation failed: data.attributes.0: Cast to string failed for value

[mogadanez]

Model:

const mongoose = require("mongoose");
const Schema = mongoose.Schema; // Schema constructor

// CREATE THE SCHEMA
const userSchema = new Schema(
  {
    name: { type: String },
    data: {
      attributes: [
        {
          code: String,
          type: String,
          name: String,
          value: String,
        },
      ],
    },
  },
  {
    timestamps: true,
  },
);

// CREATE THE MODEL
const User = mongoose.model("User", userSchema);

// EXPORT THE MODEL
module.exports = User;

/*  SEPARATING SCHEMAS AND MODELS:
`clientSchema` can be created as a separate `js` file and 
then imported to the `ClientModel` same as we did with the `paymentSchema`.
 */

creation:

const objValido = {
  name: "Furi",
  data: {
    attributes: [
      {
        code: "String",
        type: "String",
        name: "String",
        value: "String",
      },
    ],
  },
};

// This will throw an error
// because we are trying to insert an object that doesn't
// follow the Schema structure
User.create(objValido).then((createdUser) => {
  console.log("createdUser", createdUser);
});

got error:

/workspace/node_modules/mongoose/lib/document.js:2575
    this.$__.validationError = new ValidationError(this);
                               ^

ValidationError: User validation failed: data.attributes.0: Cast to string failed for value "{ code: 'String', type: 'String', name: 'String', value: 'String' }" at path "data.attributes", data.attributes: Cast to Array failed for value "[ { code: 'String', type: 'String', name: 'String', value: 'String' } ]" at path "data.attributes"
    at Document.invalidate (/workspace/node_modules/mongoose/lib/document.js:2575:32)
    at model.$set (/workspace/node_modules/mongoose/lib/document.js:1247:12)
    at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:980:14)
    at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
    at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:960:12)
    at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
    at model.Document (/workspace/node_modules/mongoose/lib/document.js:140:12)
    at model.Model (/workspace/node_modules/mongoose/lib/model.js:106:12)
    at new model (/workspace/node_modules/mongoose/lib/model.js:4677:15)
    at /workspace/node_modules/mongoose/lib/model.js:3046:22
    at /workspace/node_modules/mongoose/lib/model.js:3082:7
    at Array.forEach (<anonymous>)
    at /workspace/node_modules/mongoose/lib/model.js:3081:15
    at /workspace/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:5
    at new Promise (<anonymous>)
    at promiseOrCallback (/workspace/node_modules/mongoose/lib/helpers/promiseOrCallback.js:30:10) {
  errors: {
    'data.attributes.0': CastError: Cast to string failed for value "{ code: 'String', type: 'String', name: 'String', value: 'String' }" at path "data.attributes"
        at SchemaString.cast (/workspace/node_modules/mongoose/lib/schema/string.js:606:11)
        at SchemaType.applySetters (/workspace/node_modules/mongoose/lib/schematype.js:1071:12)
        at SchemaType._applySetters (/workspace/node_modules/mongoose/lib/schematype.js:1030:28)
        at SchemaArray._applySetters (/workspace/node_modules/mongoose/lib/schema/array.js:291:45)
        at SchemaType.applySetters (/workspace/node_modules/mongoose/lib/schematype.js:1064:16)
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:1211:20)
        at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:980:14)
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
        at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:960:12)
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
        at model.Document (/workspace/node_modules/mongoose/lib/document.js:140:12)
        at model.Model (/workspace/node_modules/mongoose/lib/model.js:106:12)
        at new model (/workspace/node_modules/mongoose/lib/model.js:4677:15)
        at /workspace/node_modules/mongoose/lib/model.js:3046:22
        at /workspace/node_modules/mongoose/lib/model.js:3082:7
        at Array.forEach (<anonymous>) {
      stringValue: `"{ code: 'String', type: 'String', name: 'String', value: 'String' }"`,
      messageFormat: undefined,
      kind: 'string',
      value: {
        code: 'String',
        type: 'String',
        name: 'String',
        value: 'String'
      },
      path: 'data.attributes.0',
      reason: null,
      '$originalErrorPath': 'data.attributes'
    },
    'data.attributes': CastError: Cast to Array failed for value "[ { code: 'String', type: 'String', name: 'String', value: 'String' } ]" at path "data.attributes"
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:1250:11)
        at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:980:14)
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
        at model._handleIndex (/workspace/node_modules/mongoose/lib/document.js:960:12)
        at model.$set (/workspace/node_modules/mongoose/lib/document.js:921:22)
        at model.Document (/workspace/node_modules/mongoose/lib/document.js:140:12)
        at model.Model (/workspace/node_modules/mongoose/lib/model.js:106:12)
        at new model (/workspace/node_modules/mongoose/lib/model.js:4677:15)
        at /workspace/node_modules/mongoose/lib/model.js:3046:22
        at /workspace/node_modules/mongoose/lib/model.js:3082:7
        at Array.forEach (<anonymous>)
        at /workspace/node_modules/mongoose/lib/model.js:3081:15
        at /workspace/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:5
        at new Promise (<anonymous>)
        at promiseOrCallback (/workspace/node_modules/mongoose/lib/helpers/promiseOrCallback.js:30:10)
        at Function.create (/workspace/node_modules/mongoose/lib/model.js:3016:10) {
      stringValue: `"[ { code: 'String', type: 'String', name: 'String', value: 'String' } ]"`,
      messageFormat: undefined,
      kind: 'Array',
      value: [
        {
          code: 'String',
          type: 'String',
          name: 'String',
          value: 'String'
        }
      ],
      path: 'data.attributes',
      reason: 'data.attributes'
    }
  },
  _message: 'User validation failed'
}

reproduction:
https://codesandbox.io/p/devbox/mongoose-forked-tqc962

what I'm missing?

[vkarpov15]

type: String in your attributes array. Because of type, Mongoose reads your schema definition as "attributes is an array of strings". Use the following instead:

// CREATE THE SCHEMA
const userSchema = new Schema(
  {
    name: { type: String },
    data: {
      attributes: [
        {
          code: String,
          type: { type: String }, // <-- change here to tell Mongoose that `type` is a path, not saying that `attributes` is array of strings
          name: String,
          value: String,
        },
      ],
    },
  },
  {
    timestamps: true,
  },
);