[英]How to set up nested resources controller in Rails 4?
我的应用程序中有3个模型。 用户(通过Devise),发布和回复。 用户可以是帖子和回复的父级,回复属于用户和帖子。
由于某种原因,它不会将回复保存到数据库中。 在输出上,我看不到user_id 。 我用来创建@reply的函数是current_user.replies.create(reply_params) 。 HTML输出括号也对我来说似乎有点奇怪。 为什么仅在:reply大括号中添加:comment ? 知道我做错了什么吗?
楷模:
class Post < ActiveRecord::Base
belongs_to :user
has_many :replies
validates_presence_of :title, :tekst
validates :tekst, length: {minimum: 10}
end
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
has_many :posts, dependent: :destroy
has_many :replies
end
class Reply < ActiveRecord::Base
belongs_to :post
belongs_to :user
validates_presence_of :user, :post, :comment
validates :comment, length: {minimum: 10}
end
控制器:
class RepliesController < ApplicationController
before_action :set_post, only: [:new, :index, :create]
before_filter :authenticate_user!
def index
@replies = @post.replies
end
def new
@reply = Reply.new
end
def create
@reply = current_user.replies.create(reply_params)
respond_to do |format|
if @reply.save
format.html { redirect_to @post, notice: 'Reply was
successfully saved' }
format.json { render json: @post }
else
format.html { render :new }
format.json { render json: @post.errors, status: 'Wrong entry'
}
end
end
end
private
def reply_params
params.require(:reply).permit(:comment, :post_id)
end
def set_post
@post = Post.find(params[:post_id])
end
end
形成:
<%= form_for [@post, @reply] do |f| %>
<%= f.text_field :comment %>
<% f.hidden_field :post_id, value: @post.id %>
<%= f.submit %>
<% end %>
架构:
create_table "replies", force: :cascade do |t|
t.integer "post_id"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.text "comment"
end
add_index "replies", ["post_id"], name: "index_replies_on_post_id"
add_index "replies", ["user_id"], name: "index_replies_on_user_id"
以及它如何看待输出:
Parameters: {"utf8"=>"✓", "authenticity_token"=>"lot of nubers",
"reply"=>{"comment"=>"sdfsddasd"}, "commit"=>"Create Reply",
"post_id"=>"1"}
失败是因为您没有将帖子与回复相关联。 尝试这个...
def create
@reply = @post.replies.new(reply_params)
@reply.user = current_user
respond_to do |format|
if @reply.save
...
end
end
另外,请注意,您应该实例化回复(使用new
,而不是create
),然后保存它。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.