Rails Validates don't work on update

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I've got a problem with validators. I have a "contact" model which contains two fields firstname and lastname and I want both required on CREATE and UPDATE method. When I create a record with no data, the server return me a 422 and do the rollback. This is ok. But when I update a record the server don't return the error 422 although the server does the rollback. And I need the return of the error to manage it on the client side.

So I use validators like this :

class Contact < ActiveRecord::Base
    validates :lastname,    presence: true
    validates :firstname, presence: true
end

and my controller is:

class ContactsController < ApplicationController

    respond_to :json

    def index
        respond_with Contact.all
    end

    def create
        respond_with Contact.create(contact_params)
    end

    def show
        respond_with Contact.find(params[:id])
    end

    def edit
        respond_with Contact.find(params[:id])
    end

    def update
        respond_with Contact.find(params[:id]).update(contact_params)
    end

    def destroy
        respond_with Contact.find(params[:id]).destroy
    end

    private
        def contact_params
            params.require(:contact).permit(:lastname, :firstname, :position)
        end

end

I have a serializer:

class ContactSerializer < ActiveModel::Serializer
    attributes :id, :lastname, :firstname, :created_at, :updated_at
end

Someone could help me, please ?

Thanks by advance.

asked 3 mins ago

Jean Creuzé des Châtelliers

1

Rails Validates don't work on update