Question

尝试显示照片评论，照片属于个人资料。 html不呈现。

相关代码：

的routes.rb

  resources :profiles do
    resources :photos do
      resources :comments do
        resources :comments
      end
    end
  end

评论/ _comment.html.haml

= comments.each do |comment|
  %li
    = comment.body 
    \-
    %small Submitted 
    = #{time_ago_in_words(comment.created_at)}

    = semantic_form_for [@profile, @photo, comment, Comment.new] do |f|
      = f.inputs do
        = f.input :body, placeholder: "Add a Reply"
        %br/
      = f.actions do
        = f.action :submit, :as => :input, label: "Reply"
    %ul
      - render partial: 'comments/comment', locals: {comments: comment.comments}

模型/ photo.rb

class Photo < ActiveRecord::Base
  belongs_to :profile
  has_many :comments, as: :commentable, :dependent => :destroy
end

模型/ comment.rb

class Comment < ActiveRecord::Base
  belongs_to :profile
  belongs_to :commentable, polymorphic: true
  has_many :comments, as: :commentable, :dependent => :destroy
end

模型/ profile.rb

class Profile < ActiveRecord::Base
  belongs_to :user
  has_many :photos, :dependent => :destroy
  has_many :comments, :dependent => :destroy
end

应用程序/控制器/ phtos_controller.rb

class PhotosController < ApplicationController
  before_action :set_photo, only: [:show, :edit, :update, :destroy]
  before_action :set_profile
  load_and_authorize_resource

  def index
    @photos = Photo.where(:profile => @profile)
  end

  def show
  end

  def new
    @photo = Photo.new(:profile => @profile)
  end

  def edit
  end

  def create
    @photo = Photo.new(photo_params.merge(:profile_id => @profile.id))

    respond_to do |format|
      if @photo.save
        format.html { redirect_to [@profile, @photo], notice: 'Photo was successfully created.' }
        format.json { render :show, status: :created, location: @photo }
      else
        format.html { render :new }
        format.json { render json: @photo.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    respond_to do |format|
      if @photo.update(photo_params)
        format.html { redirect_to [@profile, @photo], notice: 'Photo was successfully updated.' }
        format.json { render :show, status: :ok, location: @photo }
      else
        format.html { render :edit }
        format.json { render json: @photo.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy
    @photo.destroy
    respond_to do |format|
      format.html { redirect_to profile_photos_url, notice: 'Photo was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
  # Use callbacks to share common setup or constraints between actions.
  def set_photo
    @photo = Photo.find(params[:id])
  end

  def set_profile
    @profile = Profile.find(params[:profile_id])
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def photo_params
    params.require(:photo).permit(:description, :attachment)
  end
end

/app/views/photos/show.html.haml

= render partial: "layouts/sub_header", locals: {heading:    @photo.profile.name + "'s", sub_heading: "photo", current_bread_crumb: @photo.profile.name + "'s photo", include_crumbs: true}
/ Intro Content
.row
  .col-md-6
    = image_tag @photo.attachment.url(:large), :class => "img-responsive"
  .col-md-6
    %p
      %h2 About this photo...
      = simple_format(@photo.description)
      ,
 / /.row

 %h3 Comments

 = semantic_form_for [@profile, @photo, Comment.new] do |f|
   = f.inputs do
     = f.input :body, :as => :text
   = f.actions do
     = f.action :submit, :as => :input

 %ul
   - render partial: 'comments/comment', locals: {comments: @photo.comments}

 - if current_user == @profile.user
   = link_to 'Edit', edit_profile_photo_path(@profile, @photo)
   |
  = link_to 'Back', :back

正在将数据插入到数据库中（除了profile_id，但我会将其保存到另一个帖子中）。我手动更新了db中的profile_id，以查看它是否只是一个数据完整性问题，仍然没有。

我试过在routes.rb中移动资源，我已经尝试重构视图以直接加载集合而没有部分，似乎没什么用。

此外，如果我注释掉部分并使用此代码，我确实会在页面上看到注释主体，所以在调用部分或部分内部时，我肯定会出错。

%ul
  - @photo.comments.each do |comment|
    = comment.body

我似乎无法破解这个，我知道这不是魔术，但我显然没有看到什么。

感谢您的帮助！

Answer 1

将show.html.haml更改为：

%ul
  - render 'comments/comment', locals: {comments: @photo.comments}

原因是，您无法在视图中呈现视图，因此上述内容将假设您正在评论文件夹中查找名为_comment.html.haml的部分视图。

Answer 2

感谢Marc和Jarvis的所有帮助，我仍然不知道为什么这不起作用，但是在api.rubyonrails.org上查看ActionView :: PartialRender我发现这确实有效。 ..

  - @photo.comments.each do |comment|
    = render partial: 'comments/comment', locals: { comment: comment }

我基本上必须自己进行迭代，尽管在Marc引用中明确指出它应该能够做我写过的内容。

哦，好吧，接下来的问题。

再次感谢！

Rails 4：评论部分不呈现

2 个答案: