使用浅层路由时,不同的路由需要不同的form_for参数 [英] When using shallow routes, different routes require different form_for arguments
问题描述
我在这里使用简单表单,但这也是普通的Rails表单的问题.使用浅层路由时,form_for需要使用不同的参数,具体取决于所使用的上下文.
I'm using Simple Form here, but this is an issue with normal Rails forms, too. When using shallow routes, form_for needs different arguments depending in what context it's used.
示例:要进行编辑(http://localhost:3000/notes/2/edit
),_ form.html.erb必须具有simple_form_for(@note)
.但是要创建新笔记(http://localhost:3000/customers/2/notes/new
)_form.html.erb需要simple_form_for([@customer, @note])
.如果任何一个接收到错误的参数,我都会得到方法未找到的错误.
Example: For editing (http://localhost:3000/notes/2/edit
), _form.html.erb needs to have simple_form_for(@note)
. But for creating a new note (http://localhost:3000/customers/2/notes/new
) _form.html.erb needs simple_form_for([@customer, @note])
. If either receives the wrong arguments, I'll get a method not found error.
处理此问题的最佳方法是什么?
What's the best way to deal with this?
- 我可以制作两个单独的表格,但这看起来很混乱.
- 我必须为反向链接设置@customer,但是我可以在表单中使用其他变量(例如@customer_form),而不必在edit和update方法中进行设置,但这是不一致的,并且有些混乱,因为我必须在新方法中同时设置@customer_form和@customer.
- 我可以做这家伙所做的事情并将表格拆分为多个文件.到目前为止,它似乎是最好的选择,但我真的不太喜欢它,因为您不能只打开_form.html.erb并查看正在发生的情况.
- I could make two separate forms, but that seems messy.
- I have to set @customer for the back link, but I could use a different variable in the form (say, @customer_form) and just not set it in the edit and update methods, but that's inconsistent and slightly confusing, since I'd have to set both @customer_form and @customer in the new method.
- I could do what this guy did and split the form up across multiple files. It looks like the best option so far, but I don't really like it much, since you can't just open _form.html.erb and see what's happening.
这些是我唯一的选择吗?
Are these my only options?
示例如下:
config/routes.rb
Billing::Application.routes.draw do
resources :customers, :shallow => true do
resources :notes
end
end
耙路| grep note
customer_notes GET /customers/:customer_id/notes(.:format) notes#index
POST /customers/:customer_id/notes(.:format) notes#create
new_customer_note GET /customers/:customer_id/notes/new(.:format) notes#new
edit_note GET /notes/:id/edit(.:format) notes#edit
note GET /notes/:id(.:format) notes#show
PUT /notes/:id(.:format) notes#update
DELETE /notes/:id(.:format) notes#destroy
app/views/notes/_form.html.erb
# v----------------------------- Right here
<%= simple_form_for (@note), html: { class: 'form-vertical'} do |f| %>
<%= f.input :content %>
<%= f.button :submit %>
<% end -%>
app/views/notes/new.html.erb
<h1>New note</h1>
<%= render 'form' %>
<%= link_to 'Back', customer_path(@customer) %>
app/views/notes/edit.html.erb
<h1>Editing note</h1>
<%= render 'form' %>
<%= link_to 'Show', @note %>
<%= link_to 'Back', customer_path(@customer) %>
app/controllers/notes_controller.rb
class NotesController < ApplicationController
def show
@note = Note.find(params[:id])
@customer = Customer.find(@note.customer_id)
respond_to do |format|
format.html
format.json {render json: @note }
end
end
# GET /notes/new
# GET /notes/new.json
def new
@note = Note.new
@customer = Customer.find(params[:customer_id])
respond_to do |format|
format.html # new.html.erb
format.json { render json: @note }
end
end
# GET /notes/1/edit
def edit
@note = Note.find(params[:id])
@customer = Customer.find(@note.customer_id)
end
# POST /notes
# POST /notes.json
def create
@customer = Customer.find(params[:customer_id])
@note = @customer.notes.build(params[:note])
respond_to do |format|
if @note.save
format.html { redirect_to @customer, notice: 'Note was successfully created.' }
format.json { render json: @note, status: :created, location: @note }
else
format.html { render action: "new" }
format.json { render json: @note.errors, status: :unprocessable_entity }
end
end
end
# PUT /notes/1
# PUT /notes/1.json
def update
@note = Note.find(params[:id])
@customer = Customer.find(@note.customer_id)
respond_to do |format|
if @note.update_attributes(params[:note])
format.html { redirect_to @customer, notice: 'Note was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @note.errors, status: :unprocessable_entity }
end
end
end
# DELETE /notes/1
# DELETE /notes/1.json
def destroy
@note = Note.find(params[:id])
@note.destroy
respond_to do |format|
format.html { redirect_to :back }
format.json { head :no_content }
end
end
end
推荐答案
如果您通过表单构建器传递的数组中的第一个对象是nil
,Rails将仅发布到第二个对象.因此,只需不要在控制器的编辑操作中设置 @customer
对象.如果需要访问客户对象,请通过@note
调用它.
If the first object in the array you pass the form builder is nil
, Rails will POST to the second object only. For this reason simply don't set your @customer
object in your controller's edit action. If you need access to the customer object, call it through @note
.
如果您要对新建和编辑使用相同的部分,则需要在控制器的新操作中设置@note.customer
(编辑时不会设置@customer
).
If you're using the same partial for new and edit, you'll want to set @note.customer
in the controller's new action (@customer
won't be set when editing).
我认为这是Rails团队希望其工作的方式.
I think this is how the Rails team intended it to work.
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