Class: ExtraValidations::CollectionValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
lib/extra_validations/collection_validator.rb

Overview

Makes sure that each member of the collection is a valid object.

Suppose that you have the following class:

class Book
  include ActiveModel::Model
  include ExtraValidations

  attr_accessor :authors

  validates :authors, collection: true
end

This validator will call #valid? for each member of the collection:

book = Book.new
book.authors = [invalid_author1, valid_author1]
book.valid? # => false

book.authors = [valid_author1, valid_author2]
book.valid? # => true

Each validation error found on members will be appended on to the errors object:

book.errors.messages # => {:"authors/1/name"=>["can't be blank"]}

Instance Method Summary collapse

Instance Method Details

#validate_each(record, attribute, collection) ⇒ Object

Parameters:

  • record —

    An object that has ActiveModel::Validations included

  • attribute (Symbol)
  • collection (Array) —

    An array of objects that have ActiveModel::Validations included



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# File 'lib/extra_validations/collection_validator.rb', line 34

def validate_each(record, attribute, collection)
  return if collection.blank?

  collection
    .each(&:valid?)
    .each_with_index do |obj, i|
      obj.errors.each do |attr, error|
        record.errors.add("#{attribute}/#{i}/#{attr}", error)
      end
    end
end