在has_many =>通过关联的关系中的Rails 3路由错误

Question

我的模型设置如下：

 class User
 has_many :memberships, :dependent => :destroy
 has_many :groups, :through => :memberships

 Class Group
 has_many :memberships, :dependent => :destroy
 has_many :users, :through => :memberships

 Class Membership
 attr_accessible :user_id, :group_id
 belongs_to :user
 belongs_to :group

我的MembershipController＃create

def create
  @membership = current_user.memberships.build(:group_id => params[:group_id])
  if @membership.save
    flash[:notice] = "You have joined this group."
    redirect_to :back
  else
    flash[:error] = "Unable to join."
    redirect_to :back
  end
end

我的路线中有资源：memberships，因此它可以找到create动作。

最后，在“ Group＃show”操作中，我希望用户能够加入一个组。 所以我创建了这个form_tag

<%= form_tag(membership_path) do %>
    <%= hidden_field_tag @group.id %>
    <%= submit_tag "Join Group"%>
<% end %>

这将返回以下错误：

Routing Error

No route matches [POST] "/memberships/1"

我已经尝试过耙路，以了解我在这里所缺少的东西：

成员资格GET /memberships(.:format）{：action =>“ index”，：controller =>“ memberships”} POST / memberships（。：format）{：action =>“ create”，controller =>“ memberships”} new_membership GET /memberships/new(.:format）{：action =>“ new”，controller =>“ memberships”} edit_membership GET /memberships/:id/edit(.:format){:action=>"edit“，控制器=>“成员资格”}

成员资格GET /memberships/:id(.:format）{：action =>“ show”，：controller =>“ memberships”} PUT /memberships/:id(.:format){:action=>"update“，： controller =>“ memberships”}删除/memberships/:id(.:format）{：action =>“ destroy”，：controller =>“ memberships”}

有人看到我的方式的错误吗？

Answer 1

您不想发布到memberships_path而不是membership_path吗？ 似乎错误表明它找不到成员资格的POST路由，原因是实际上：POST的：membership实际上没有路由，：only成员身份。

Answer 2

我快速浏览了一下； 不应<%= form_tag(membership_path) do %>是<%= form_tag(@membership) do %> '或<%= form_tag(membership_path(@membership)) do %> 。

Answer 3

路径是“ new_membership”对吗？ new_membership_path（如果您正在执行form_tag），或者您始终可以使用form_for并通过视图中的局部渲染它​​。