.current_user在使用范围时不起作用？

Question

I'm using Devise and has_scope gem for filtering options and only want show a current users links only.

This works

@links = current_user.links.all

This does not. Can someone explain what i need to do to make this work?

@links = apply_scopes(Link).current_user.all

Answer 1

One solution is to create a scope in the link that takes an argument user_id and in your controller has_scope with no arguments, and just pass a hash to apply_scopes method to override the supplied values of your scope.

Link Model

scope :of_user,->(user_id){ where(user_id: user_id)}

Link Controller

has_scope :of_user

Just call apply_scopes(Link, of_user: current_user.id).all where of_user is just the applied params for the named scope.

Answer 2

I suggest the following pattern to apply for ownership:

Model

scope :by_owner, ->(user_id) { where(user_id: user_id) }

Controller

has_scope :by_owner, allow_blank: true,
  default: ->(controller){ controller.current_user } do |controller, scope|
    scope.by_owner(controller.current_user.id)
  end

The by_owner scope is applied by default. No need to add any additional scopes to your action.

An example:

def index
  render json: apply_scopes(Link)
end