在我的member_profile表单中,我想拥有对管理员可见的角色复选框。我想使用一些嵌套的form_for,但不能使它工作,所以我使用手动创建check_box_tags(见下文),然后手动将它们添加到member_profile.member。
请注意,成员模型是Devise,我不希望将这些字段与我的MemberProfile数据混合,以防我将来更改auth系统。
class Member < ActiveRecord::Base
has_one :member_profile
has_many :member_roles
has_many :roles, :through => :member_roles
end
class MemberProfile < ActiveRecord::Base
belongs_to :member
has_many :member_roles, :through => :member
#has_many :roles, :through => :member_roles #can't make this work work
end
class Role < ActiveRecord::Base
has_many :member_roles
validates_presence_of :name
end
class MemberRole < ActiveRecord::Base
belongs_to :member
belongs_to :role
end
表格(haml)
= form_section do
- Role.all.each do |x|
=check_box_tag 'member[role_ids][]',
x.id,
begin @resource.member.role_ids.include?(x.id) rescue nil end
=x.name
member_profiles_controller.rb
def update
if @resource.update_attributes params[:member_profile]
@resource.member.role_ids = params[:member][:role_ids]
redirect_to(@resource, :notice => 'Member profile was successfully updated.')
else
render :action => "edit"
end
end
答案 0 :(得分:0)
我认为只做一个嵌套的has_many:通过更新是有意义的,因为连接模型正在“通过”到达has_many:through模型。在创建hmt之前,连接模型中显然没有记录。