更新关系表

时间:2013-02-11 22:15:31

标签: ruby-on-rails database ruby-on-rails-3 many-to-many

我正在处理编辑项目的视图,其中包含一个包含所有项目字段的表单,而对于项目成员,我则会显示复选框。

当提交表单并且控制器接管时,我从param中删除了成员数组,以便我可以正确地更新项目。但是,我想知道是什么代码我应该使用成员更新表projects_users(现在在数组@members中)?

修改项目视图

<%= form_for @project do |f| %>
    ...
        the rest of the form
    ...
    <div class="checkbox">
        <% @members.each do |user| %>
            <%= check_box_tag "project[members][]", user.id, '1', :id => "user_#{user.id}" %> 
            <%= label_tag "user_#{user.id}", user.first_name + ' ' + user.last_name, :class => "checkbox" %>
        <% end %>
    </div>
    ...
        the rest of the form
    ...
<% end %>

投影控制器:

...
def update
  @project = Project.find(params[:id])
  @members = params[:project].delete(:members)

  if @project.update_attributes(params[:project])

    ... code for updating projects_users? ...

    redirect_to users_projects_path
    flash.now[:success] = 'Projektet redigerades.' # Not quite right!
  else
    render :action => "edit"
  end
end
...

表projects_users:

t.integer "project_id"
t.integer "user_id"

1 个答案:

答案 0 :(得分:1)

使用Project的user_ids属性更新其用户:

# In the view:
<%= check_box_tag "project[user_ids][]", user.id, '1', :id => "user_#{user.id}" %> 


# In the controller:
@project = Project.find(params[:id])

#@members = params[:project].delete(:members)
# you don't need this line since :
# params[:project][:members] became params[:project][:user_ids]

if @project.update_attributes(params[:project])
  #...