删除HABTM对象

Question

我有以下代码这给我一个ActionView::Template::Error (undefined method roster_path”为＃<＃：0x007fe34005c208>）：`

虽然在后台它删除关联player_roster（有和属于多个），但是当我按下链接时我想删除它。

名册的路径嵌套在一个团队内，但问题是关于名册和球员。

<%= form_for [@team, @roster] do |f| %> 
    <% @players.each do |player| %> 
     <%= player.gamertag %> 
     <%= link_to "Delete", player.rosters.delete(@roster) %> 
    <% end %> 
<% end %> 

：更新

Player.rb

class Player < ActiveRecord::Base 
    has_and_belongs_to_many :rosters 
    belongs_to :country 

    mount_uploader :picture, PictureUploader 
end 

Roster.rb

class Roster < ActiveRecord::Base 
    has_and_belongs_to_many :players 
    has_many :placements 

    belongs_to :team, touch: true 
end 

Answer 1

你正在做的，现在会打电话给你delete在页面加载时的方式。您不能链接到任意的Ruby代码，您需要链接到执行您的逻辑的路由和控制器操作。

<%= form_for [@team, @roster] do |f| %> 
    <% @players.each do |player| %> 
     <%= player.gamertag %> 
     <%= link_to "Delete", player_roster_path(player, @roster), method: :delete %> 
    <% end %> 
<% end %> 

这个链接将路线的玩家/：ID /名册/：ID和DELETE HTTP动作，这Rails会路线destroy方法。

class RostersController < ApplicationController 

    def destroy 
    @player = Player.find(params[:player_id]) 
    @roster = Roster.find(params[:id]) 
    @player.rosters.destroy(@roster) 
    # redirect/render 
    end 

end 

您还需要设置player_roster_path在配置路由/ routes.rb中

resources :players do 
    resources :rosters, only: [:destroy] # you may have other routes here as well 
end