Question

我试图编辑一个字段，以便当用户创建帐户时，所有者布尔值设置为true，因此它进入数据库。我得到错误未定义方法`owner

= form_for @school do |f|
  = f.label :school_name, "School Name"
  = f.text_field :school_name, :class => 'form-control'
  = f.label :latitude, "Latitude"
  = f.text_field :latitude, :class => 'form-control'
  = f.label :longitude, "Longitude"
  = f.text_field :longitude, :class => 'form-control'
  = f.label :radius, "Radius"
  = f.text_field :radius, :class => 'form-control'
  = f.fields_for :admins do |ff|
    = ff.label :email
    = ff.text_field :email, :class => 'form-control'
    = ff.label :password
    = ff.password_field :password, :class => 'form-control'
    = ff.label :password_confirmation
    = ff.password_field :password_confirmation, :class => 'form-control'
  = f.submit :class => 'submit-button'

def new
  @school = School.new
  @school.admins.build
  @school.admins.owner = true
end

def create
  @school = School.new(school_params)

  if @school.save
    redirect_to :action => 'show', :id => @school
  else
    render 'new'
  end

Answer 1

由于ArrayAdapter是多个管理员的集合，因此它没有@school.admins方法，该方法存在于该集合中的各个管理对象上。

Answer 2

当你致电@school.admins.build时，它会返回一个新的Admin实例，但你没有对该实例做任何事情。您需要将其放在变量中，然后为其owner属性赋值。这将是这样的：

@school = School.new
@admin = @school.admins.build
@admin.owner = true

但build方法采用属性参数，因此您可以将其缩短为：

@school = School.new
@admin = @school.admins.build(owner: true)

不要忘记你还需要在某个时候保存这个对象。

使用.build保存的编辑属性

2 个答案: