Validate object against Mongoose schema without saving as a new document

Question

I want to verify some data that will be embedded in a new document but not before as many other things need to occur. So I was thinking to add a function to the static methods that would hopefully validate objects in an array against the model schema.

Here is the code:

module.exports = Mongoose => {

    const Schema = Mongoose.Schema

    const peopleSchema = new Schema({

        name: {

            type: Schema.Types.String,

            required: true,

            minlength: 3,

            maxlength: 25

        },

        age: Schema.Types.Number

    })

    /**

     * Validate the settings of an array of people

     *

     * @param   {array}     people  Array of people (objects)

     * @return  {boolean}

     */

    peopleSchema.statics.validatePeople = function( people ) {

        return _.every(people, p => {

            /**

             * How can I validate the object `p` against the peopleSchema

             */

        })

    }

    return Mongoose.model( 'People', peopleSchema )

}

So the peopleSchema.statics.validatePeople is where I'm attempting to do the validation. I have gone through mongooses validation documents, but it doesn't seem to state how to authenticate against a model without saving the data.

Answer 1

One way is to perform that with the help of custom validators. When the validation declined, it failed to save the document into the database.

var peopleSchema = new mongoose.Schema({

        name: String,

        age: Number

    });

var People = mongoose.model('People', peopleSchema);

peopleSchema.path('name').validate(function(n) {

    return !!n && n.length >= 3 && n.length < 25;

}, 'Invalid Name');

function savePeople() {

    var p = new People({

        name: 'you',

        age: 3

    });

    p.save(function(err){

        if (err) {

             console.log(err);           

         }

        else

            console.log('save people successfully.');

    });

}

Or another way to do that through validate() function provided by MongoDB with the same schema as you defined.

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var p = new People({

    name: 'you',

    age: 3

});

p.validate(function(err) {

    if (err)

        console.log(err);

    else

        console.log('pass validate');

});