Rails link_to从控制器操作更新属性

Question

I want to be able to have a link that when pressed updates one attribute based up a controller action. How would I be able to do this? Do I have to create a separate update route? I am new at this so please bear with me.

controller

def completed
 @meeting = Meeting.find(params[:id])
 if @meeting.day_of_meeting == @meeting.days
  @meeting.update_attribute(:day_of_meeting, '1')
  redirect_to :back
 else
  @meeting.increment!
  redirect_to :back
 end
end

model

def increment!
  update_attribute(:day_of_meeting, day_of_meeting + 1)
end

view

<%= link_to meetings_completed_path(@meeting), remote: true do %>

routes

resources :meetings do
  get 'meetings/completed'
end

Answer 1

There are several issues with your code

1. Since you are updating a record you need to include method: :patch in your link and also you need to modify the routes file to include appropriate route.

   In your routes file add

    #routes.rb resources :meetings do member do patch 'completed' end end 

   In your view

    <%= link_to "Mark as completed", completed_meeting_path(@meeting), remote: true, method: :patch %> 

2. Since you have a remote:true in your link so rails will try to render a javascript template and since you are not rendering a javascript template you will get a template missing error

   In your controller

    def completed @meeting = Meeting.find(params[:id]) respond_to do |format| # if something ... # update meeting record and then render js template format.js {render :status => :ok} # it will render completed.js.erb inside 'app/views/meetings/' directory # else # something else format.js {render :action => "different_action"} # it will render different_action.js.erb inside 'app/views/meetings/' directory end end 

Now all you need to do is to write some basic javascript in the js templates to update the view.

Note : If you don't want to render anything simply use format.js { render :nothing => true } . Also if you want to use redirect_to calls instead of rendering js template just remove remote: true form you link .

Answer 2

You can set the action in set_member_album =: image_capa

#app/controllers/member/albums_controller.rb
class Member::AlbumsController < ApplicationController
before_action :set_member_album, only: [:show, :edit, :update, :destroy, :image_capa]

  #PATCH/PUT /adm/image_capa/1
  def image_capa
    # @member_album = Member::Album.find(params[:id]) # sempre colocar a action before_action :set_member_album, only: [:show, :edit, :update, :destroy, :image_capa]
    if @member_album.update(image_capa: params[:image_capa])
      respond_to do |format|
        format.html { redirect_to member_albums_url, notice: t('albums.image_capa_success') }
        format.json { head :no_content }
      end
    end
  end

private
    # Use callbacks to share common setup or constraints between actions.
    def set_member_album
      @member_album = Member::Album.find(params[:id])
    end

end