Rapscallion

Ruby on Rails client side validations

Add Rapscallion to application.js:

//= require rapscallion/validations

Activate in Javascript:

$(selector).rapscallion();

Options:

• Change class of error message div
  error_message_container_class: "error_messages"

• Set a class on field with error
  field_with_error_class: 'has_error'

• Set a class on field with success
  field_valid_class: 'is_valid'

• Container for input – used to add and remove error messages
  field_container: 'div.input'

• Event that triggers validation
  trigger: 'blur'

eg $('.rapscallion').rapscallion('errors', field_container: '.field')

Add Rapscallion to Gemfile:

gem 'rapscallion'

View example of input tag with Simple Form:

.input
  = f.input :username, input_html: {class: 'rapscallion'}

Form tag when validating an existing record (for example to avoid uniqueness validation problems):

= simple_form_for @thing, html: {data: {existing_record: @thing.id}} do |f|

Model:

class User < ActiveRecord::Base
    validate :username, presence: true
end