通过factory_girl关联查找或创建记录 [英] Find or create record through factory_girl association

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本文介绍了通过factory_girl关联查找或创建记录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个属于某个组的用户模型。组必须具有唯一的name属性。用户工厂和组工厂定义为：

  Factory.define：user do | f | 
 f.association：group，：factory => ：group 
＃... 
 end 
 
 Factory.define：group do | f | 
 f.namedefault
 end

创建第一个用户还创建了一个新组。当我尝试创建第二个用户时，它会失败，因为它想再次创建同一个组。



有一种方法告诉factory_girl关联方法先查找现有记录？



注意：我尝试定义一个方法来处理这个问题，但是我不能使用f.association。我想能够在Cucumber场景中使用它，像这样：

 给定以下用户存在：
 |电子邮件|组| 
 | test@email.com |名称：mygroup |

这只能在工厂定义中使用关联时才能使用。



$ b

我做了以下操作：

 ＃in groups.rb factory 
 
 def get_group_named（name）
＃获取现有组或创建新组
 Group.where（：name => name）.first ||工厂（：group，：name => name）
 end 
 
 Factory.define：group do | f | 
 f.namedefault
 end 
 
＃in users.rb factory 
 
 Factory.define：user_in_whatever do | f | 
 f.group {| user | get_group_named（whatever）} 
 end


I have a User model that belongs to a Group. Group must have unique name attribute. User factory and group factory are defined as:

Factory.define :user do |f|
  f.association :group, :factory => :group
  # ...
end

Factory.define :group do |f|
  f.name "default"
end

When the first user is created a new group is created too. When I try to create a second user it fails because it wants to create same group again.

Is there a way to tell factory_girl association method to look first for an existing record?

Note: I did try to define a method to handle this, but then I cannot use f.association. I would like to be able to use it in Cucumber scenarios like this:

Given the following user exists:
  | Email          | Group         |
  | test@email.com | Name: mygroup |

and this can only work if association is used in Factory definition.

解决方案

I ended up using a mix of methods found around the net, one of them being inherited factories as suggested by duckyfuzz in another answer.

I did following:

# in groups.rb factory

def get_group_named(name)
  # get existing group or create new one
  Group.where(:name => name).first || Factory(:group, :name => name)
end

Factory.define :group do |f|
  f.name "default"
end

# in users.rb factory

Factory.define :user_in_whatever do |f|
  f.group { |user| get_group_named("whatever") }
end

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