CastError: Cast to ObjectId failed for value "" at path "_id"

[nguyentienlamhp]

• when mongoose model :
  { type: mongoose.Schema.Types.ObjectId, ref:'User' }
  save recode mongo ok but notify error message.
  Check log: CastError: Cast to ObjectId failed for value "60431cda5212971347249673,6043153626c524444533d6d8" at path "_id"

[seleshabani]

i have the same issue 🤧

[valdo99]

same here.

[OmkoBass]

const mongoose = require("mongoose");

const clientSchema = mongoose.Schema({
  belongsTo: { type: String, ref: 'User', required: true },
  toAddress: { type: String, max: 128, required: true },
  toCity: { type: String, max: 128, required: true },
  toName: { type: String, max: 128, required: true },
  toPib: { type: String, max: 128, required: true },
});

module.exports = mongoose.model("Client", clientSchema);

This is an example model. It tries to convert the belongsTo to objectId because it references to User model. You can fix this error by removing this ref and leaving it like this.

const mongoose = require("mongoose");

const clientSchema = mongoose.Schema({
  belongsTo: { type: String, required: true },
  toAddress: { type: String, max: 128, required: true },
  toCity: { type: String, max: 128, required: true },
  toName: { type: String, max: 128, required: true },
  toPib: { type: String, max: 128, required: true },
});

module.exports = mongoose.model("Client", clientSchema);

If someone knows any other solutions, because I'd love a solution where we can add the ref and it would be a link to the other document.