我正在尝试同时创建组,用户和成员资格(多对多关系)。人们可以在创建组时将用户添加到组中,然后我希望它通过所有成员路由到组的视图。我可以创建用户和当前用户的成员身份以保存到数据库。但是我很难获得新创建的User对象的id,以便保存新的成员资格。
class Group < ActiveRecord::Base
has_many :memberships
has_many :users, :through => :memberships
has_many :users
accepts_nested_attributes_for :users, :reject_if => lambda { |a| a[:name].blank? or a[:number].blank? }
end
class Membership < ActiveRecord::Base
belongs_to :groups
belongs_to :users
end
class User < ActiveRecord::Base
has_many :memberships
has_many :groups, :through => :memberships
belongs_to :group
end
class GroupsController < ApplicationController
def show
@group = Group.find(params[:id])
respond_to do |format|
format.html
end
end
def new
@group = Group.new
3.times { @group.users.build }
end
def create
@group = Group.new(params[:group])
@group.memberships.build(:user_id => current_user.id)
logger.info @group.users
@group.users.each do |x|
@group.memberships.build(:user_id => x.id )
end
respond_to do |format|
if @group.save
format.html { redirect_to(@group, :notice => 'Success!') }
else
format.html { render :action => "new" }
end
end
end
end
我的表单如下:
由以下人员创建:
<h1>New group</h1>
<%= form_for(@group) do |form| %>
<fieldset>
<legend>Create a new group</legend>
<%= render 'shared/group_error_messages', :object => form.object %>
<div class="clearfix">
<%= form.label :group_name %>
<div class="input">
<%= form.text_field :group_name %>
</div>
</div>
<div id="users">
<div class="user">
<%= form.fields_for :users, :url => {:action => 'new', :controller => 'users', :registered => false}, do |user_form| %>
<%= render 'user', :user => user_form %>
<% end %>
</div>
</div>
</div>
<div class="actions">
<%= form.submit :value => 'Create your group', :class => 'btn success'%>
</div>
</fieldset>
<% end %>
<div class="clearfix">
<%= user.label :name %>
<div class="input">
<%= user.text_field :name %>
</div>
</div>
<div class="clearfix">
<%= user.label :number %>
<div class="input">
<%= user.text_field :number %>
</div>
</div>
<div class="clearfix" style="display:none">
<%= user.label :password %>
<div class="input">
<%= user.password_field :password, :value => newpass(6) %><!-- todo: fix this horrible hack -->
</div>
</div>
<div class="clearfix" style="display:none">
<%= user.label :registered %>
<div class="input">
<%= user.text_field :registered, :value => false %> <!-- todo: fix this horrible hack -->
</div>
</div>
<div class="clearfix" style="display:">
<%= user.label :id %>
<div class="input">
<%= user.text_field :id %> <!-- todo: fix this horrible hack -->
</div>
</div>
因此,我的主要愿望是在创建用户ID时使用这些代码来查找用户ID,然后使用这些ID在组和用户之间构建成员资格。
非常非常非常感谢<)>
答案 0 :(得分:5)
我认为
has_many :users, :through => :memberships
has_many :users
错误,您不能拥有两个或多个具有相同名称的关联。
尝试
has_many :users, :through => :memberships
has_many :members, :class_name => 'User', :foreign_key => :user_id
并在视图和控制器中进行相应的更改。像
form.fields_for : members