Question

我正在尝试创建一个teacher表，其中有一个名为'teacher_type_id'的列，即它是一个连接到teacherType表的外键，该表有三行，即1 = ＆GT;导师，2 =＆gt;模块负责人和3 =＆gt;讲师。

我的schema.rb文件中包含以下信息：

create_table "teacher_types", :force => true do |t|
 t.string   "title"
 t.datetime "created_at", :null => false
 t.datetime "updated_at", :null => false
end

create_table "teachers", :force => true do |t|
 t.integer  "teacherType_id"
 t.string   "firstName"
 t.string   "lastName"
 t.datetime "created_at",     :null => false
 t.datetime "updated_at",     :null => false
end

add_index "teachers", ["teacherType_id"], :name => "index_teachers_on_teacherType_id"

teacher_typ.rb文件如下所示：

class TeacherType < ActiveRecord::Base
 has_many :teachers
 attr_accessible :title, :teacher_type_id   (Also tried :teacherType_id)
end

我的teacher.rb文件如下所示：

class Teacher < ActiveRecord::Base
  has_one :teacherType
  attr_accessible :firstName, :lastName
end

但是，现在我去localhost:3000/teacher/new并尝试使用“1”或“Tutor”作为TeacherType创建新教师，但是当我提交表单时，我总是得到相同的错误，这是：

ActiveModel::MassAssignmentSecurity::Error in TeachersController#create

Can't mass-assign protected attributes: teacherType_id
Rails.root: /Users/omar/rails_projects/attendance

Application Trace | Framework Trace | Full Trace
app/controllers/teachers_controller.rb:43:in `new'
app/controllers/teachers_controller.rb:43:in `create'

Request

Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"NEJf3bISJsidStVyfdRns0oZ7JzSZ8RqqZSAWgL9hz8=",
 "teacher"=>{"teacherType_id"=>"Tutor",
 "firstName"=>"Jack",
 "lastName"=>"Sparrow"},
 "commit"=>"Create Teacher"}`

任何想法为什么会这样？我查看了attr_accessible，但仍然无济于事

Answer 1

teacherType_id在TeachersController #new视图中被分配了一个字符串，但它被声明为整数。检查你的观点。另外，我避免使用混合情况下的名称，例如teacherType_id ...

Answer 2

老师

：

attr_accessible :firstName, :lastName, :teacherType_id

无法批量分配受保护的属性错误

2 个答案: