在 Rails 中提交多个表单的自定义操作

Question

所以我有这样的应用程序结构：一个Game 模型，它有很多Allies 和很多Enemies。

我想为Game 创建一个自定义动作，专门用于创建和提交敌人和盟友。 所以在视图中我会有 2 个 fields_for，你可以同时提交。

我从未创建过自定义路由和操作，也从未在同一页面中提交过 2 个子表单。

有谁知道我该怎么做？谢谢

Answer 1

routes.rb

#this route shows the form
get 'create-players/:id', to 'game#new_players', as: :new_players
# this route recieves the form post submission
post 'create-players/:id', to 'game#create_players', as: :create_players

app/controllers/game_controller.rb:

def new_players
  @game = Game.find(params[:id])
end

def create_players
  #do whatever you want with the params passed from the form like
  @allies = Ally.create(game_id: params[:id], name: params[:ally_fields][:name])
  @enemies = Enemy.create(game_id: params[:id], name: params[:enemy_fields][:name])
  @game = Game.find(params[:id])
end

app/views/game/new_players.html.erb：

<%= form_tag(create_players_paths, @game.id), method: 'POST') do %>
  <% #...fields you have on models, perhaps %>
  <% fields_for :ally_fields do |f|
    <%= f.text_field :name, nil, placeholder: "Ally name", required: true
  <% end % >
  <% fields_for :enemy_fields do |f|
    <%= f.text_field :name, nil, placeholder: "Enemy name", required: true
  <% end % >
  <%= submit_tag "create players", class: "submit" %>
<% end %>

app/views/game/create_players.html.erb：

   <h1> Woah an allie and an enemy have been added to game <%= @game.id %></h1>
   <p> Lets see some blood!</p>

当然，您应该在处理提交提交之前对输入进行验证。通常您会希望使用对象之间已建立的关系，以便您可以在视图@model = Modelname.new 然后form_for @object 上执行操作，并以更简洁的方式访问验证和错误消息。