发表评论也会获得 community_id

Question

我已尝试找出无法保存 community_id 背后的问题，希望有人可以帮助我。

模型

用户

has_one :profile
has_many :communities, dependent: :destroy
has_many :comment, dependent: :destroy

社区

extend FriendlyId
friendly_id :title, use: [:slugged, :finders]

has_many :comments
belongs_to :user

评论

belongs_to :user
belongs_to :community
belongs_to :profile

控制器

社区

def index
 @communities = Community.all
 @comment = Comment.new
 @comments = Comment.all
end

def create
 @community = Community.new(community_params)
 @community.user_id = session[:user_id]

 if @community.save
  flash[:notice] = "Post Created"
 else
  flash[:alert] = "Error post not created"
 end
 redirect_to "/"
end

def new
 @community = Community.new
end

def edit
 @community = Community.friendly.find(params[:id])
end

def show
 @comment = Comment.new
 @comments = Comment.all
 @community = Community.friendly.find(params[:id])
 @current_user = User.find(session[:user_id])
end

def update
 @community = Community.friendly.find(params[:id])
 if @community.update(params[:comment])
  flash[:notice] = "post updated"
 else
  flash[:alert] = "post not updated"
 end
end

def destroy
 @community = Community.friendly.find(params[:id])
 if @community.destroy
  flash[:notice] = "Post was thrown away"
 else
  flash[:alert] = "Post was not deleted"
 end
 redirect_to "/"
end

private

def community_params
 params.require(:community).permit(:user_id, :title, :bio)
end

评论

def index
 @comments = Comment.all
end

def create
 @comment = Comment.new(comment_params)
 @comment.user_id = session[:user_id]

 if @comment.save && @comment.community_id
  flash[:notice] = "Comment has been posted"
 else
  flash[:alert] = @comment.errors.full_messages
 end

 redirect_to :back
end

def new
 @comment = Comment.new
end

def show
 @comment = Comment.find(params[:id])
end

def destroy
 @comment = Comment.find(params[:id])
 @comment.destroy
 redirect_to :back
end

private

def comment_params
 params.require(:comment).permit(:text, :user_id, :community_id, :profile_id)
end

观看次数

cmets/_new

<%= form_for @comment do |f| %>
 <%= f.hidden_field :community_id %>
 <%= f.text_area :text, placeholder: "Enter New Comment Here ...", :cols => 50, :rows => 3, :class => 'text_field_message', :id => 'new_comment' %>
 <%= f.submit :class => 'new_comment_button' %>
<% end %>

每当我检查我的控制台时，我都会注意到 user_id 已在评论中注册，但 community_id 为 nil。有人可以指出我正确的方向或帮助我了解我在哪里犯了错误。感谢您的所有帮助。

Answer 1

首先，

#app/models/user.rb
has_many :comments, dependent: :destroy  #-> this should be plural.

---

您的community_id 输入属性没有任何价值：

#app/controllers/comments_controller.rb
class CommentsController < ApplicationController
   def new
      @comment = Comment.new
   end
end

#app/views/comments/new.html.erb
<%= form_for @comment do |f| %>
   <%= f.hidden_field :community_id, params[:community_id] %>
<% end %>

我假设您正在通过路由传递您的 :community_id 参数（即 url.com/communities/:community_id/comments/new）

---

我会做以下事情：

#config/routes.rb
resources :communities do
   resources :comments
end

#app/controllers/comments_controller.rb
class CommentsController < ApplicationController
   def new
      @comment = Comment.new
   end

   def create
      @comment = Comment.new comment_params
      @comment.save
   end

   private

   def comment_params
       params.require(:comment).permit(:text).merge(user_id: current_user.id, community_id: params[:community_id])
   end
end

这将使您能够使用以下视图：

#app/views/comments/new.html.erb
<%= form_for @comment do |f| %>
   <%= f.text_area :text, placeholder: "Enter New Comment Here ...", :cols => 50, :rows => 3, :class => 'text_field_message', :id => 'new_comment' %>
   <%= f.submit :class => 'new_comment_button' %>
<% end %>