mongoid document supports array as field. array field in mongoid document is a ruby array but its quite complex to manage array field in rails forms.
After lot of google and reading comments from stack-overflow at last i felt helpless. Finally after doing research on rails form helper object(form_for, fields_for) am pleased to get it working as expected :)
In below example, product can have multiple categories
class Product
CATEGORIES = %w(Apparel Media Software Sports Agri Education)
include Mongoid::Document
field :name, :type => String
field :categories, :type => Array
end
Here is form code
= form_for(@product) do |f|
= f.text_field :name
- Product::CATEGORIES.each do |category|
= f.check_box :categories, :name => "product[categories][]", category
Here is products controller code
class ProductsController < ApplicationController
before_filter :load_product, :only => [:new, :create]
[...]
# We don't need new action to be defined
def create
@product.attributes = params[:product]
# Here we need to reject blank categories
@product.categories.reject!(&:blank?)
if @product.save
flash[:notice] = I18n.t('product.create.success')
redirect_to(:action => :index)
else
render :action => :new
end
end
[...]
private
def load_product
@product = Product.new
end
end
