before_filter with parameters
I'd do it like this:
before_filter { |c| c.authenticate_rights correct_id_here }def authenticate_rights(project_id) project = Project.find(project_id) redirect_to signin_path unless project.hiddenendWhere correct_id_here is the relevant id to access a Project.
With some syntactic sugar:
before_filter -> { find_campaign params[:id] }, only: [:show, :edit, :update, :destroy]Or if you decide to get even more fancy:
before_filter ->(param=params[:id]) { find_campaign param }, only: %i|show edit update destroy|And since Rails 4 before_action, a synonym to before_filter, was introduced, so it can be written as:
before_action ->(param=params[:id]) { find_campaign param }, only: %i|show edit update destroy|NB
-> stands for lambda, called lambda literal, introduce in Ruby 1.9
%i will create an array of symbols
To continue @alex' answer, if you want to :except or :only some methods, here is the syntax:
before_filter :only => [:edit, :update, :destroy] do |c| c.authenticate_rights params[:id] end Found here.