Rails Grape API Endpoint optional params validation in update

Question

I have the following rails grape api endpoint in the users resource:

    desc 'updates a user'
    params do
      optional :first_name, type: String
      optional :active, type: Boolean
      optional :second_name, type: String
      optional :rating, type: Integer
      requires :id, type: Integer
    end
    put ':id' do
      user = User.find_or_create_by(id: params[:id])
      user.name = params[:name] if params[:name].present?
      user.active = params[:active] if params[:active].present?
      user.second_name = params[:second_name] if params[:second_name].present?
      user.rating = params[:rating] if params[:actratingve].present?
      user.save!
    end

Any nicer way to update model without asking per line if the param is present?

Answer 1

user.assign_attributes(params)
user.save

model.assign_attributes(hash) allows you to assign a key value hash to your ActiveRecord object. The only caveat is that the keys passed must correspond to your columns or an exception will be raised. You will need to call .save to persist the changes.

If you want to assign and save in one fell stroke, use model.update(hash).

http://api.rubyonrails.org/classes/ActiveRecord/AttributeAssignment.html