Ruby on Rails，How to add projects to users/show.html.erb with has_many names :through blueprints

Question

对于用户有蓝图的每个项目，我希望显示项目名称和到project_path的链接。谢谢。

这些是我的ActiveRecords

class User < ActiveRecord::Base
  attr_accessible :id, :name
  has_many :blueprints
  has_many :projects, :through => :blueprints
end

class Project < ActiveRecord::Base
  attr_accessible :id, :name
  has_many :blueprints
  has_many :users, :through => :blueprints
end

class Blueprint < ActiveRecord::Base
  attr_accessible :id, :name, :project_id, :user_id
  belongs_to :user
  belongs_to :project
end

我的用户显示控制器

def show
  @user = User.find(params[:id])
  @project = Project.find(params[:id])
  respond_to do |format|
    format.html # show.html.erb
    format.json { render json: @user }
  end
end

My Views/Users/Show.html.erb表

    <table>
      <tr>
        <% @projects.each do |p| %>
          <td><%= p.name %></td>
        <% end %>
      </tr>
    </table>

Answer 1

对于用户有蓝图的每个项目，我希望显示项目名称和到project_path的链接。

对于这些要求，您可以从操作中删除@project分配。您需要查看@user的blueprints关系，并获取每个project的关联blueprints。

<table>
  <tbody>
    <% @user.blueprints.each do |blueprint| %>
      <tr>
        <td><%= link_to blueprint.project.name, project_path(blueprint.project) %></td>
      </tr>
    <% end %>
  </tbody>
</table>