Question

我使用Rails3.2.8做一些练习，这是我的模型：

class Incident < ActiveRecord::Base
  attr_accessible :category, :user, :status, :reference, :location
  belongs_to :user
  has_one :location
  accepts_nested_attributes_for :location

  validates_presence_of :location, :user, :category


end

class Location < ActiveRecord::Base
  attr_accessible :latitude, :longitude, :street
  belongs_to :incident
end

这是我的测试：

require 'spec_helper'

describe Incident do
  before (:each) do
    @user = create(:user, :name => "user1")
    @incident_data = {:category => "House Break in", :user => @user,
                      :location => {:latitude => "-28.1940509", :longitude => "28.0359692",
                                    :street => "abc name"}}
  end
  describe "After create Incident successfully" do
    it "should create location" do
      incident = Incident.create(@incident_data)

      expect(incident.location.latitude).to eq("-28.1940509")
    end
  end
end

我想要做的是在创建Incident对象时自动创建Location对象。但测试失败的原因如下：

失败/错误：事件= Incident.new（@incident_data）

的ActiveRecord :: AssociationTypeMismatch：

预计位置（＃70156311891820），得到哈希（＃70156307112200）

有什么想法吗？

Answer 1

明确指出该位置应该是Location的实例，而不是Hash。

:location => {:latitude => "-28.1940509", :longitude => "28.0359692",
                                :street => "abc name"}

但是，一旦您使用嵌套属性，它应该是location_attributes（请参阅NestedAttributes docs）：

:location_attributes => {:latitude => "-28.1940509", :longitude => "28.0359692",
                                :street => "abc name"}

或者您可以创建Location对象

:location => Location.new(:latitude => "-28.1940509", :longitude => "28.0359692",
                                :street => "abc name")

Rails3无法使用has_one DSL创建嵌套模型

1 个答案: