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这是我的模型和关联：

项目

class Project < ActiveRecord::Base
   ...
   has_many :projectmemberizations
   has_many :users, :through => :projectmemberizations
   has_many :project_comments
   ...
end

项目评论

class ProjectComment < ActiveRecord::Base
   attr_accessible :comment, :created_at, :project_id, :user_id, :user_name
   belongs_to :project
   has_many :projectcommentations
   has_many :users, :through => :projectcommentations

   def user
     self.user
   end
end

项目评论

class Projectcommentation < ActiveRecord::Base
   attr_accessible :comment_id, :project_id, :user_id, :user_name
   belongs_to :project_comment
   belongs_to :user
end

用户

class User < ActiveRecord::Base
   belongs_to :account
   has_many :projectmemberizations
   has_many :projects, :through => :projectmemberizations
   has_many :projectcommentations
   has_many :project_comments, :through => :projectcommentations
end

问题

如您所见，用户可以对项目发表评论。这工作正常。但我试图开始工作的是在 WHO 创建评论的视图中显示。现在我正在尝试这样做，它没有产生任何错误，但只是没有为 user_name 显示任何内容。

<% @project.project_comments.each do |comment|%>
   <div class="comment">
      <%= image_tag current_user.photo.url(:small) %>
      <strong><%= comment.user_name %></strong>
      <%= comment.comment %>
</div>
<% end %>

最后，如果我这样做，我可以在 Rails 控制台中使用它：

comment = ProjectComment.first
comment.user_id = 1
comment.save
comment.user.name

那么显然添加评论时它没有保存user_id？顺便说一下，很抱歉这篇文章的长度！

PS这里是她的节目和project_comments控制器中的新动作：

def show
    @project_comment = ProjectComment.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render :json => @project_comment }
    end

  end

  def new
    @project_comment = ProjectComment.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render :json => @project_comment }
    end
  end

ProjectComment 创建方法

 def create
    @project_comment = ProjectComment.new(params[:project_comment])

    respond_to do |format|
      if @project_comment.save
        format.html { redirect_to project_url(@project_comment.project_id), :notice => 'Project comment was successfully created.' }
        format.json { render :json => @project_comment, :status => :created, :location => @project_comment }
      else
        format.html { render :action => "new" }
        format.json { render :json => @project_comment.errors, :status => :unprocessable_entity }
      end
    end
  end

来自创建评论的视图中的代码

<%= form_for(@project_comment) do |f| %>
   <%= f.hidden_field :project_id, :value => @project.id %>
   <%= image_tag current_user.photo.url(:small) %>
   <%= f.text_area :comment, :class => "addcomment" %>
   <%= f.submit :value => "Comment", :class => "tagbtn" %>
<% end %>
4

1 回答 1

2

您的模板当前正在显示 comment.user_name 的内容。您正在运行的 Rails 控制台示例使用了 comment.user.name。您在 ProjectComment 模型的 attr_accessible 属性列表中确实有 user_name，但没有任何已发布的代码填充该属性的值。

我相信根据您的描述，您的 ProjectCommentation 模型是不必要的。以下模型应该为您提供所需的内容：

class Project < ActiveRecord::Base
    ...
    has_many :projectmemberizations
    has_many :users, :through => :projectmemberizations
    has_many :project_comments
    ...
end

class ProjectComment < ActiveRecord::Base
    ...
    attr_accessible :comment, :created_at, :project_id, :user_id, :user_name
    belongs_to :project
    belongs_to :user
    ...
end

class User < ActiveRecord::Base
    belongs_to :account
    has_many :projectmemberizations
    has_many :projects, :through => :projectmemberizations
    has_many :project_comments
end

在 ProjectComment 控制器中：

def create
    # If params[:project_comment] contains the user_id, it will be set here
    @project_comment = ProjectComment.new(params[:project_comment])

    # If your user id comes from somewhere else (like the user that is signed in)
    @project_comment.user_id = <user id here>

    # Normal save logic here
end
于 2012-12-12T02:43:42.353 回答