我正在使用以下表单和控制器。如果我创建一个新通知,除了campus_id之外,所有内容都会被保存。
虽然我从下拉列表中选择了不同的参数,但它似乎给出了错误的校园参数。如果我之后编辑相同的条目,它会被保存吗?发生了什么,我该如何解决?
相同的表单用于编辑和创建操作。 (这是部分的)
值得注意的是,我使用浅层路线进行校园(has_many)和通知(belongs_to)。
的routes.rb
shallow do
resources :campus do
resources :notifications
end
end
形式:
<%= form_for [@campus,@notification] do |f| %>
<% if @notification.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@notification.errors.count, "error") %> prohibited this notification from being saved:</h2>
<ul>
<% @notification.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :post %><br>
<%= f.text_area :post %>
</div>
<div class="field">
<%= f.label :campus %><br>
<%= f.collection_select(:campus_id, Campus.all.order('name ASC'), :id, :name, prompt: true) %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
这是控制器:
class NotificationsController < ApplicationController
before_action :set_notification, only: [:show, :edit, :update, :destroy]
before_action :set_campus, only: [:index, :new, :create]
def index
@notifications = @campus.notification
end
def show
end
def new
@notification = @campus.notification.new
end
def edit
end
def create
@notification = @campus.notification.new(notification_params)
respond_to do |format|
if @notification.save
format.html { redirect_to @notification, notice: 'Notification was successfully created.' }
format.json { render action: 'show', status: :created, location: @notification }
else
format.html { render action: 'new' }
format.json { render json: @notification.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @notification.update(notification_params)
format.html { redirect_to @notification, notice: 'Notification was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @notification.errors, status: :unprocessable_entity }
end
end
end
def destroy
@notification.destroy
respond_to do |format|
format.html { redirect_to campu_notifications_url(1) }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_notification
@notification = Notification.find(params[:id])
end
def set_campus
@campus = Campus.find(params[:campu_id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def notification_params
params.require(:notification).permit(:post, :campus_id)
end
end
如果我查看日志,我会看到错误的参数被打了。
在84.193.153.106开始POST“/ campus / 1 / notifications” 2014-09-29 18:29:33 +0000开始POST“/ campus / 1 / notifications”for 84.193.153.106 at 2014-09-29 18:29:33 +0000 NotificationsController处理#create as HTML Processing by NotificationsController #create as HTML参数:{“utf8”=&gt;“_”, “authenticity_token”=&gt; “中oNSlEFeukwEj2hIAT89wFdIYwjHO5c8lzBlCqMyk31Y =”, “notification”=&gt; {“post”=&gt;“sdqfdsfd”,“campus_id”=&gt;“3”}, “commit”=&gt;“创建通知”,“campu_id”=&gt;“1”}参数: { “UTF8”=&gt; “中_”, “authenticity_token”=&gt; “中oNSlEFeukwEj2hIAT89wFdIYwjHO5c8lzBlCqMyk31Y =”, “notification”=&gt; {“post”=&gt;“sdqfdsfd”,“campus_id”=&gt;“3”}, “commit”=&gt;“创建通知”,“campu_id”=&gt;“1”}校园负载 (0.4ms)SELECT“campus”。* FROM“campus”WHERE“campus”。“id”= $ 1 LIMIT 1 [[“id”,“1”]]校园负荷(0.4ms)选择“校园”。* FROM “校园”在哪里“校园”。“id”= $ 1 LIMIT 1 [[“id”,“1”]](0.1ms) BEGIN(0.1ms)开始SQL(28.6ms)插入“通知” (“campus_id”,“created_at”,“post”,“updated_at”)价值(1美元,2美元,3美元, $ 4)返回“id”[[“campus_id”,1],[“created_at”,星期一,2014年9月29日 18:29:34 UTC +00:00],[“post”,“sdqfdsfd”],[“updated_at”,星期一,9月29日 2014 18:29:34 UTC +00:00]] SQL(28.6ms)INSERT INTO“notifications” (“campus_id”,“created_at”,“post”,“updated_at”)价值(1美元,2美元,3美元, $ 4)返回“id”[[“campus_id”,1],[“created_at”,星期一,2014年9月29日 18:29:34 UTC +00:00],[“post”,“sdqfdsfd”],[“updated_at”,星期一,9月29日 2014 18:29:34 UTC +00:00]](3.5ms)COMMIT(3.5ms)COMMIT
答案 0 :(得分:2)
可能希望更改new
和create
这样的操作:
def new
@notification = @campus.notifications.build
end
def create
@notification = @campus.notifications.build(notification_params)
respond_to do |format|
if @notification.save
format.html { redirect_to @notification, notice: 'Notification was successfully created.' }
format.json { render action: 'show', status: :created, location: @notification }
else
format.html { render action: 'new' }
format.json { render json: @notification.errors, status: :unprocessable_entity }
end
end
end
campus.build_notification
将实例化belongs_to
campus
的通知。使用new
会要求您将notification[campus_id]
作为参数的一部分传递。