在RAILS中将模型从一个控制器动作传递到另一个控制器动作的替代方法

Question

I have about 6-7 different actions within the same controller that get hit on each view loading. How I'm doing this now is like so:

person_id is passed into the URL.

persons_controller

person_id = params[:person_id]
people = PersonSearch.where(:person_id => person_id)
@response_people = people.map do |p|
  {
      :name => p.name,
      :age => p.age
  }

The above code snippet is written in 6-7 actions within my controller, which equates to 6-7 views that I need to display name and age on.

How could I look this person up by ID in my first view then track that specific person model through each action without having to look him up and use a .map method?

Answer 1

Create a function like this

def set_person
     person_id = params[:person_id]
     people = PersonSearch.where(:person_id => person_id)
     @response_people = people.map do |p|
     {
           :name => p.name,
           :age => p.age
     }
end

And then at the top of your controller add this but replace :show and :edit with the controller actions you want to set person on.

before_action :set_person, only: [:show, :edit]

This will run the set_person function prior to each action you specify given you access to @response_people in your views.