Question

我尝试从嵌套的json创建一个Object。但是我收到了一个AssociationTypeMismatch错误。我是ruby on rails的新手并不确定，这是正确的方法。我很感谢任何提示。

该错误出现在avatars_controller.rb中的“@ avatar.from_json（json）”行中

Avatar.rb

class Avatar < ActiveRecord::Base
  has_one :user
  accepts_nested_attributes_for :user
end

User.rb

class User < ActiveRecord::Base
  belongs_to :avatar
end

JSON

[
 {
    "id": 7,
    "user": {
        "id": 47,
        "gender": "male",
        "name": "Mark",
        "created_at": "2015-01-07T11:44:50.991Z",
        "updated_at": "2015-01-28T14:39:03.900Z"
    },
    "login_counter": 5,
    "created_at": "2015-01-28T14:39:03.896Z",
    "updated_at": "2015-03-03T12:11:43.432Z"
}
]

avatars_controller.rb

def get_data_button  
  json= open("http..." ).read
  @avatar = Avatar.new
  @avatar.from_json(json)

  respond_to do |format|
    if @avatar.save
      format.html { redirect_to user_url  }
    else
      format.html { render :new }
    end
  end
end

def avatar_params
  params.require(:avatar).permit( :login_counter, user: [:gender, :name])
end

Answer 1

请尝试使用此代码。

params.require(:avatar).permit( :login_counter, user_attributes: [:gender, :name])

[
 {
"id": 7,
"user_attributes": {
    "id": 47,
    "gender": "male",
    "name": "Mark",
    "created_at": "2015-01-07T11:44:50.991Z",
    "updated_at": "2015-01-28T14:39:03.900Z"
},
"login_counter": 5,
"created_at": "2015-01-28T14:39:03.896Z",
"updated_at": "2015-03-03T12:11:43.432Z"

} ]

在Rails中，AssociationTypeMismatch（用户（＃301360）预期，得到哈希（＃88300））

1 个答案: