Skip Validation Of Model Attribute Using Backbone.validation

I have a view that is rendered dynamically. It may have some inputs or may not have. After a user fills everything and tries to send data I call this.model.isValid(true) ( or this.

Solution 1:

How can I allow empty values but still validate if the user enters something?

By default, if you configure a validator for an attribute, it is considered required. However, if you want to allow empty values and still validate when something is entered, add required: false in addition to other validators.

validation: {
    value: {
        min:1,
        required:false
    }
}

If you can't let empty values (like at creation), Backbone.validation overrides isValid adding features to the default behavior. What's interesting is the array parameter we can pass:

// Check if name and age are validvar isValid = model.isValid(['name', 'age']);

With this, we can then validate only the fields that exist within the model at the moment:

model.isValid(_.keys(model.attributes));