我目前正在制作这样的协会：
show do
h3 project.title
panel "Utilisateurs" do
table_for project.roles do
column "Prenom" do |role|
role.user.firstname
end
column "Nom" do |role|
role.user.lastname
end
column "email" do |role|
role.user.email
end
column "Role" do |role|
role.role_name.name
end
end
end
end
# override default form
form do |f|
f.inputs "Details" do # Project's fields
f.input :title
f.input :code
end
f.has_many :roles do |app_f|
app_f.inputs do
# if object has id we can destroy it
if app_f.object.id
app_f.input :_destroy,:as => :boolean,:label => "Supprimer l'utilisateur du projet"
end
app_f.input :user,:include_blank => false,:label_method => :to_label
app_f.input :role_name,:include_blank => false
end
end
f.buttons
end
我有以下协会：
项目
has_many :roles,:dependent => :destroy has_many :users,:through => :role
has_many :roles,:dependent => :destroy has_many :projects,:through => :role
角色
belongs_to :user belongs_to :project belongs_to :role_name
ROLENAME
has_many :roles
解决方法
尝试将accepts_nested_attributes_for添加到Project模型(并将roles_attributes添加到attr_accessible)：
class Project < ActiveRecord::Base
has_many :roles,:dependent => :destroy
has_many :users,:through => :role
accepts_nested_attributes_for :roles,:allow_destroy => true
attr_accessible :roles_attributes,(+ all you had here before)
...
end