将Rails表单部分嵌入到另一个页面中 [英] Embed a Rails form partial into another page
问题描述
我正在构建一个带有联系我们页面的rails 4.2.0应用程序（此页面确实有一个半空控制器）。我试图从另一个控制器嵌入一个表单部分。
以下是代码（减去文字）：
< ;％如果user_signed_in？ ％GT;
<％render'queries / form'％>
<％end％>
当我运行这个时，我得到错误'表单中的第一个参数不能包含零或为空。
我的查询表单看起来像一个基本的栏杆形式：
< ;％= form_for @enquiry do | f | ％GT;
<％如果@ enquiry.errors.any？ ％GT;
< div id =error_explanation>
< h2><％= pluralize（@ enquiry.errors.count，error）％>禁止保存此查询：< / h2>
< ul>
<％@ enquiry.errors.full_messages.each do | message | ％GT;
< li><％= message％>< / li>
<％end％>
< / ul>
< / div>
<％end％>
< div class =field>
<％= f.label：subject，Subject：％>< br>
<％= f.text_field：subject％>
< / div>
< div class =field>
<％= f.label：e_description，说明：％>< br>
<％= f.text_area：e_description％>
< / div>
< div class =actions>
<％= f.submit％>
< / div>
错误的可能原因是什么？或者有更好的方法将视图嵌入到另一个视图中？
更新/编辑：
这里是路线：
devise_for：用户
资源：房间做
资源：查看
结束
资源：rmcats
资源：extras
资源：extracats
资源：查询
root：to =>重定向（'/ pages / home'）
获得'pages / home'
获得'pages / contactus'
和查询控制器：
class EnquiriesController< ApplicationController
before_action：set_enquiry，only：[：show，：edit，：update，：destroy]
＃GET / queries
def index
@enquiries = Inquiry .all
end
＃GET / queries / 1
def show
end
＃GET / queries / new
def new
@enquiry = Enquiry.new
end
＃GET / queries / 1 / edit
def edit
end
$ POST /查询
def创建
@enquiry = Enquiry.new（enquiry_params）
如果@ enquiry.save
redirect_to @enquiry，notice：'Inquiry '
else
render：new
end
end
＃PATCH / PUT / queries / 1
def update
if @ enquiry.update（enquiry_params）
redirect_to @enquiry，注意：'Inquiry has successfully updated。'
else
render：edit
end
end
＃DELETE / queries / 1
def destroy
@ enquiry.destroy
redirect_to enquiries_u rl，notice：'Inquiry was destroyed destroyed。'
end
private
＃使用回调来共享操作之间的常见设置或约束。
def set_enquiry
@enquiry = Enquiry.find（params [：id]）
end
＃只允许通过一个可信参数白名单。
def enquiry_params
params.require（：inquiry）.permit（：subject，：e_description）
end
end
这是pages控制器：
class PagesController< ApplicationController
around_filter：resource_not_found
＃def home
＃end
private
＃如果找不到资源重定向到root和flash错误。
＃=>对于页面而言，这将很少需要，因为它应该是404.
def resource_not_found
yield
rescue ActiveRecord :: RecordNotFound
redirect_to root_url，：notice => 找不到网页。
end
end
编辑：
Log：
开始GET/ pages / contactus为:: 1于2015-03-21 01:05:25 +0000
由EnquiriesController处理＃new as HTML
[1m [35mUser Load（0.0ms）[0m SELECTusers。* FROMusersWHEREusers。id =？ ORDER BYusers。idASC LIMIT 1 [[id，1]]
渲染查询/ _form.html.erb（0.0ms）
渲染页面/ contactus.html.erb布局/应用程序（0.0ms）
在235ms内完成200 OK（查看：234.6ms | ActiveRecord：0.0ms）
它告诉你，当它试图呈现表单时， @enquiry 是零。您需要调用新操作来为要表示的表单创建 @enqiury 。
您可以将您的路线更改为：
get'pages / contactus'=> '查询＃新'
然后在您的调查控制器中：
def new
@enquiry = Enquiry.new
render'pages / contactus'
end
好的，现在我们结合Friends Systems在他的回答中提出的问题：
<％if user_signed_in？ ％GT;
<％=呈现'查询/表格'查询：@查询％>
<％end％>
现在更改任何 @enquiry 以查询形式
这是因为您需要将变量传递给partial。
I'm building a rails 4.2.0 app with a contact us page (this page does have a semi-empty controller). I'm trying to embed a form partial from another controller.
Here is the code (minus the text):
<% if user_signed_in? %>
<% render 'enquiries/form' %>
<% end %>
When I run this I get the error 'First argument in form cannot contain nil or be empty'.
My enquiries form looks like a basic rails form:
<%= form_for @enquiry do |f| %>
<% if @enquiry.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@enquiry.errors.count, "error") %> prohibited this enquiry from being saved:</h2>
<ul>
<% @enquiry.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :subject, "Subject:" %><br>
<%= f.text_field :subject %>
</div>
<div class="field">
<%= f.label :e_description, "Description:" %><br>
<%= f.text_area :e_description %>
</div>
<div class="actions">
<%= f.submit %>
</div>
What could be the possible reason for the error? Or is there a better way of embedding a view into another?
Update/Edit:
Here's the routes:
devise_for :users
resources :rooms do
resources :viewings
end
resources :rmcats
resources :extras
resources :extracats
resources :enquiries
root :to => redirect('/pages/home')
get 'pages/home'
get 'pages/contactus'
And the enquiry controller:
class EnquiriesController < ApplicationController
before_action :set_enquiry, only: [:show, :edit, :update, :destroy]
# GET /enquiries
def index
@enquiries = Enquiry.all
end
# GET /enquiries/1
def show
end
# GET /enquiries/new
def new
@enquiry = Enquiry.new
end
# GET /enquiries/1/edit
def edit
end
# POST /enquiries
def create
@enquiry = Enquiry.new(enquiry_params)
if @enquiry.save
redirect_to @enquiry, notice: 'Enquiry was successfully created.'
else
render :new
end
end
# PATCH/PUT /enquiries/1
def update
if @enquiry.update(enquiry_params)
redirect_to @enquiry, notice: 'Enquiry was successfully updated.'
else
render :edit
end
end
# DELETE /enquiries/1
def destroy
@enquiry.destroy
redirect_to enquiries_url, notice: 'Enquiry was successfully destroyed.'
end
private
# Use callbacks to share common setup or constraints between actions.
def set_enquiry
@enquiry = Enquiry.find(params[:id])
end
# Only allow a trusted parameter "white list" through.
def enquiry_params
params.require(:enquiry).permit(:subject, :e_description)
end
end
This is the pages controller:
class PagesController < ApplicationController
around_filter :resource_not_found
# def home
# end
private
# If resource not found redirect to root and flash error.
# => For pages this will rarely be needed as it should 404.
def resource_not_found
yield
rescue ActiveRecord::RecordNotFound
redirect_to root_url, :notice => "Page not found."
end
end
Edit:
Log:
Started GET "/pages/contactus" for ::1 at 2015-03-21 01:05:25 +0000
Processing by EnquiriesController#new as HTML
[1m[35mUser Load (0.0ms)[0m SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 1]]
Rendered enquiries/_form.html.erb (0.0ms)
Rendered pages/contactus.html.erb within layouts/application (0.0ms)
Completed 200 OK in 235ms (Views: 234.6ms | ActiveRecord: 0.0ms)
解决方案 It is telling you that @enquiry is nil at the time it is trying to render the form. You need to call the new action to create the @enqiury for the form to represent.
You could change your route to:
get 'pages/contactus' => 'enquiries#new'
Then in your Enquiry controller:
def new
@enquiry = Enquiry.new
render 'pages/contactus'
end
EDIT:
Ok, so now we combine what Friends Systems put in his answer:
<% if user_signed_in? %>
<%= render 'enquiries/form' enquiry: @enquiry %>
<% end %>
And now change any instance of @enquiry in the form to enquiry
This is because you need to pass the variable to the partial.
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