Ruby on rails 4 如何获得嵌套注释中缺少的必需键:[:post_id]?
我有组显示页面上应该是帖子和他们相应的评论。我的模型是:Ruby on rails 4 如何获得嵌套注释中缺少的必需键:[:post_id]?,ruby-on-rails-4,params,Ruby On Rails 4,Params,我有组显示页面上应该是帖子和他们相应的评论。我的模型是: class Group < ActiveRecord::Base belongs_to :user has_many :posts class Post < ActiveRecord::Base belongs_to :group belongs_to :user has_many :comments class Comment < ActiveRecord::Base belongs_to :user belong
class Group < ActiveRecord::Base
belongs_to :user
has_many :posts
class Post < ActiveRecord::Base
belongs_to :group
belongs_to :user
has_many :comments
class Comment < ActiveRecord::Base
belongs_to :user
belongs_to :post
我的控制器看起来像:
class GroupsController < ApplicationController
def show
@group = Group.find(params[:id])
@posts = @group.posts.paginate(page: params[:page])
@post = current_user.posts.build if user_signed_in?
@comment = current_user.comments.build if user_signed_in?
end
class PostsController < ApplicationController
def create
@post = current_user.posts.build(post_params)
@group = Group.find(params[:group_id])
if @post.save
@group.posts << @post
flash[:success] = "Post created!"
redirect_to group_path(@group)
else
@posts = @group.posts.paginate(page: params[:page])
@users = @group.users
render 'groups/show'
end
end
class CommentsController < ApplicationController
def create
@comment = current_user.comments.build(comment_params)
@post = Post.find(params[:post_id])
@group = Group.find(params[:group_id])
if @comment.save
@post.comments << @comment
flash[:success] = "comment created!"
redirect_to group_path(@group)
else
@posts = @group.posts.paginate(page: params[:page])
@users = @group.users
render 'groups/show'
end
end
类组控制器 @组最终找到了解决方案。在分解到零件后,我发现post_id在那里,但实际上group_id不见了。问题是在创建注释时,post_id和group_id都是必需的,但由于注释是嵌套的,我无法访问group_id。解决方案非常简单:
class CommentsController < ApplicationController
def create
@comment = current_user.comments.build(comment_params)
@post = Post.find(params[:post_id])
@group = @post.group
class CommentsController
您是否在同一页面上呈现帖子列表及其评论?你如何将评论发布到特定/单个帖子?是的,这是你想要完成的,但不知道如何完成。这应该很像这里的答案/帖子列表和下面的评论列表。因为你循环了所有帖子数据和相关评论(比如2次迭代)[第一篇帖子。每个帖子| post |>>下一篇是post.comments do]。如果你有这个过程,你可能会得到正确的评论帖子id。在页面组/显示我有两个表单,一个是新帖子的表单,每个帖子下面是新评论的表单。问题是我无法创建新注释,因为它找不到相应的post(resp.post\u id),应该在其下创建它。您是否尝试将post\u id放入类似post\u comments\u path(:post\u id=>@post.id)的表单路径中,然后在控制器中捕获参数。
<%= simple_form_for @comment, uri: post_comments_path do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= hidden_field_tag :post_id, @post.id %>
<%= f.input :content,label: false, placeholder: "add comment", error: false %>
<%= f.button :submit, "Comment", class: 'btn-primary' %>
<% end %>
class CommentsController < ApplicationController
def create
@comment = current_user.comments.build(comment_params)
@post = Post.find(params[:post_id])
@group = @post.group