轨道/ Rspec的 - 书写规范，涉及自定义验证和belongs_to的关联

Question

我有以下AR的has_many，belongs_to的关系：

联赛 - >会议 - >司 - >团队

我有一个事件模型看起来像这样：

class Event < ActiveRecord::Base 
    belongs_to :league 
    belongs_to :home_team, :class_name => 'Team', :foreign_key => :home_team_id 
    belongs_to :away_team, :class_name => 'Team', :foreign_key => :away_team_id 

    validate :same_league 

    def same_league 
    return if home_team.blank? || away_team.blank? 
    errors.add :base, "teams must be in the same league" if home_team.league != away_team.league 
    end 
end 

部分厂家：

FactoryGirl.define do 
    factory :league do 
    name 'NFL' 
    end 
end 

Factory.define :conference do |f| 
    f.name 'NFC' 
    f.association :league 
end 

Factory.define :division do |f| 
    f.name 'North' 
    f.association :conference 
end 

Factory.define :team do |f| 
    f.name 'Packers' 
    f.locale 'Green Bay' 
    f.association :division 
end 

FactoryGirl.define do 
    factory :event do 
    association :league 
    association :home_team, :factory => :team 
    association :away_team, :factory => :team 
    end 
end 

所以，所有这一切，我会怎么去写一个spec的same_league验证方法？

我的问题是知道什么是最简单的方式去创造不同的联赛两队关联一个与HOME_TEAM和其他与事件模型AWAY_TEAM。

Answer 1

您可以存储使用工厂生成的实例，然后显式使用其ID来填充后续工厂的外键。

这里我创建了两个联赛，然后设置了两个测试。其中一项赛事在同一联赛中有两支球队，另一支在不同联赛中有两支球队。这样我可以测试事件对象是否正确验证：

describe Event do 
    before(:each) do 
    @first_league = Factory(:league) 
    @second_league = Factory(:league) 
    end 
    it "should allow the home_team and away_team to be from the same league" do 
    home_team = Factory(:team, :league_id => @first_league.id) 
    away_team = Factory(:team, :league_id => @first_league.id) 
    event = Factory(:event, :home_team_id => home_team.id, :away_team_id => away_team.id) 
    event.valid?.should == true 
    end 
    it "should not allow the home_team and away_team to be from two different leagues" do 
    home_team = Factory(:team, :league_id => @first_league.id) 
    away_team = Factory(:team, :league_id => @second_league.id) 
    event = Factory(:event, :home_team_id => home_team.id, :away_team_id => away_team.id) 
    event.valid?.should == false 
    end 
end