Question

A have a base controller for my admin namespace

class Admin::AdminController < ApplicationController

  def update
    entity = @source.find(params[:id])
    close_popup entity.update_attributes(params[@param_name])? {return_url => @url}:{}
  end

  ...

end

And all my admin controllers derives from AdminController, eg:

class Admin::ProductsController < Admin::AdminController
  @source = Admin::Product
  @url = admin_products_url
  @param_name = :admin_product
end

Now, my question is how can i avoid setting those parameters in the derrived classes. For that i will need to know from the base controller itself

1. What scaffold is it associeted with. ( @source )
2. The url for listing entities ( @url )
3. Parameter name coming from POST associated to the entity ( @param_name)

Thanks

Answer 1

Well if you are sure that all these controllers will be in the format you mentioned, you could do the following:

define a before_filter in the class Admin::AdminController named set_default_parmas

class Admin::AdminController < ApplicationController
  before_filter :set_default_params

  def set_default_params
    resource_name = controller_name.singularize
    @source = "Admin::#{resource_name.camelize}".constantize
    @url = self.send("admin_#{controller_name}_url")
    @param_name = "admin_#{resource_name}".to_sym
  end

end

references to used methods:
singularize, constantize, camelize and controller_name