Question

在我的应用程序中，我有3个类似的模型：

class Person
has_many :groups
has_many :group_memberships, :foreign_key => "member_id"
end

class Group_Membership
 belongs_to :member, :class_name => 'Person'
 belongs_to :group
end

class Group
belongs_to :person
has_many :group_memberships
has_many :members, :class_name => "Person", :through => "group_memberships", :foreign_key => "member_id"

我需要的是在组#show页面中创建一个按钮，允许Person要求group_membership。根据上一个问题的建议，我在Group_Membership控制器上发了def create_membership：

def create_membership
  @group = Group.find params[:id]
  if @group.group_memberships.create( :member_id => params[:member_id])
     redirect_to @group
  else
     render :action => 'show'
  end
end

所以我转到了我的表单，在＃show view组中，我做了如下：

<%= form_for :group_membership, @group_membership, :url => { :action => "create_membership" } do |f| %>
<%= submit_tag "Create" %>
<% end %>

但每次我点击按钮，它都会将我重定向到表单以创建新组，而不是Group_Membership。任何提示？提前谢谢。

######## EDIT ##########

好吧，我有点改变了我的代码：

def create
@person = Person.find(current_person)
@group = Group.find(params[:group_id])
params[:group_membership] = {:member_id => @person.id, :group_id => @group.id}
@group_membership = Group_Membership.create(params[:group_membership])
if @group_membership.save
redirect_to @person
else
redirect_to @person
end
end

我的表格现在就是这样：

<% form_for(:group_membership, :url => group_memberships_path(:member_id => current_person, :group_id => @group.id)) do |f| %> <%= submit_tag "Join!" %>

现在我可以实际创建group_membership模型，但这两个id在数据库列member_id和group_id中都是空白的。

如果我将行@group_membership = Group_Membership.create(params[:group_membership])更改为@group_membership = Group.Group_Membership.create(params[:group_membership])，我就可以保存组ID。如果我改为Person.，也一样。

Answer 1

只是为了清理一下

def create
  @group_membership = Group_Membership.create(:group => Group.find(params[:group_id]), :member => Person.find(current_person))
  if @group_membership.save
    redirect_to @person
  else
    redirect_to @person
  end
end

此代码应该在rails 3中工作我不确定早期版本

Rails - 形成问题

1 个答案: