用于销毁 has_many 的视图/控制器：通过关联

Question

我有用户、团队和 TeamMemberships，它们与 has_many :through 关联。

我正在尝试添加从团队中删除用户的功能，这需要销毁关联他们的 TeamMembership 模型。

我的模型如下：

# models/team.rb
class Team < ActiveRecord::Base
  has_many :team_memberships, :dependent => :destroy
  has_many :members, :through => :team_memberships
end

# models/user.rb
class User < ActiveRecord::Base
  has_many :team_memberships
  has_many :teams, :through => :team_memberships
end

# models/team_membership.rb
class TeamMembership < ActiveRecord::Base
  belongs_to :team
  belongs_to :member, class_name: 'User', foreign_key: 'user_id'
end

视图当前如下所示：

- @team.members.each do |member|
  .member
    = link_to member.name, user_path(member)
    = button_to "Remove User"

我正在寻求帮助来完成“删除用户”按钮的实现。我不知道如何传递我需要销毁的 TeamMembership。

Answer 1

resources :teams do
    resources :users do
        member do
            delete :remove_from_team
        end
    end
end

在用户控制器中：

def remove_from_team
    @team = Team.find(params[:team_id]) #can do that in before_filter
    user = User.find(params[:id])
    @team.members.delete user
    redirect_to @team
end

在视图中，

= button_to "Remove user", remove_from_team_team_user_path(@team, member), :method => :delete

---

您也可以

resources :team_memberships

在 team_memberships 控制器中执行销毁操作，

= button_to "Remove user", team_membership_path(@team.team_memberships.where(:user_id => member.id).first), :method => :delete

但是即使用户从未单击链接，也需要进行查询才能获取每个成员的 team_membership...