ruby-on-rails - 无法批量分配 protected 属性错误

我正在尝试创建一个teacher表，其中有一个名为“teacher_type_id”的列，即它是一个外键，连接到teacherType表，该表有三行，即1=>Tutor、2=>Module Leader和3=>讲师。
我的schema.rb文件包含以下信息：

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：

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

但是，现在当我转到我的localhost:3000/teacher/new并尝试使用“1”或“Tutor”作为教师类型创建一个新教师时，但是当我提交表单时，总是会得到相同的错误，即：
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"}`

你知道为什么吗？我看了一下attr_accessible但仍然没有结果

最佳答案

教师：

attr_accessible :firstName, :lastName, :teacherType_id

tutor

ruby-on-rails - 无法批量分配 protected 属性错误