自定义模式的猫鼬typeError

Question

I'm trying to use discountSchema as a type. But I'm getting this error:

throw new TypeError('Undefined type at `' + path +
      ^
TypeError: Undefined type at `discount`

but if I transform to type array :

    discount: {
        type: [discountSchema],
        default:{}
    }

it works.

How can I use complex type in mongoose as this? Am I using this model in a wrong way? How can I model this object like this?

var discountSchema = new Schema({
    type: {type: String,default:'' },
    quantity: {type: Number,default:0 },
    value: {type: Number,default:0 }
});
var objectEncomendaPropertiesSchema = {
    recheios:{
        type:[String],
        default: [],
        select: true
    },
    availableEncomenda: {
        type: Boolean,
        default:false
    },
    discount: {
        type: discountSchema,
        default:{}
    }
};

Answer 1

You cant't set embedded documents stored as single property in mongoose, they are always stored in arrays .

The closest thing to this behaviour is setting your property to an ObjectId with a ref and using the populate method to fetch it. Take a look here to see how this approach works.

---

Check out embedded documents docs .

There is an open issue on GitHub requesting the behaviour you want.

Answer 2

are you trying to create two Schemas then wire them up?

var discountSchema = new Schema({
    type: {type: String,default:'' },
    quantity: {type: Number,default:0 },
    value: {type: Number,default:0 }
});

mongoose.model('Discount', discountSchema);

var objectEncomendaPropertiesSchema = new Schema({
    recheios:{
        type: String,
        default: '',
        select: true
    },
    availableEncomenda: {
        type: Boolean,
        default:false
    },
    discount: {
        type: Schema.Types.ObjectId,
        ref: 'Discount'
    }
})

mongoose.model('objectEncomendaProperties', objectEncomendaPropertiesSchema); 

I reference the discount in the second schema to reference to the first schema by the ObjectId
It will fetch the properties in the Discount model as a discount property in the second Schema.