与factory_girl、rpsec 2.0和rails 3.0有关的问题=>无法让 has_one 关系很好地协同工作！
我正在运行rails 3.0、rspec 2.0 和factory_girl。这是我正在处理的简化场景：当我运行 rspec spec/models/user_spec.rb 时，用户一次只能订阅一个计划
# user.rb
class User < ActiveRecord::Base
has_one :plan
attr_accessible :login, :plan_id
end
# plan.rb
class Profile < ActiveRecord::Base
attr_accessible :plan
end
# user_factory.rb
Factory.define :user do |u|
u.login "test"
u.association :plan
end
#plan_factory.rb
Factory.define :plan do |p|
p.name "plan1"
end
我收到此错误：
失败/错误：user = Factory(:用户） SQLite3::ConstraintException：users.plan_id 可能不为 NULL
#spec/models/user_spec.rb
require File.dirname(__FILE__) + '/../spec_helper'
describe User do
it "should be valid" do
user = Factory(:user)
#User.new.should be_valid
user.should be_valid
end
end
我做错了什么？我陷入了这个非常简单的场景，这非常令人沮丧。那时 BDD 让我慢了下来！
I'm running rails 3.0, rspec 2.0 and factory_girl. Here is the simplified scenario I'm working with: a user can subscribe to only one plan at a time
# user.rb
class User < ActiveRecord::Base
has_one :plan
attr_accessible :login, :plan_id
end
# plan.rb
class Profile < ActiveRecord::Base
attr_accessible :plan
end
# user_factory.rb
Factory.define :user do |u|
u.login "test"
u.association :plan
end
#plan_factory.rb
Factory.define :plan do |p|
p.name "plan1"
end
when I run rspec spec/models/user_spec.rb I got this error:
Failure/Error: user = Factory(:user)
SQLite3::ConstraintException: users.plan_id may not be NULL
#spec/models/user_spec.rb
require File.dirname(__FILE__) + '/../spec_helper'
describe User do
it "should be valid" do
user = Factory(:user)
#User.new.should be_valid
user.should be_valid
end
end
what I'm doing wrong? I'm stuck with this very simple scenario, and it is very frustating. at that point BDD slow me down like hell!
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评论（2）
您似乎错误地实现了
has_one关联。has_one --belongs_to关系中的外键应位于与具有belongs_to指令的模型对应的表中。检查db/schema.rb——我想您会发现plan_id是在users表中定义的。如果您希望User模型有一个Plan，则需要从users中删除plan_id并添加user_id到计划。如果您想让
Plan拥有一个User，请保持架构不变并将has_one :user放入Plan和user中的belongs_to :plan。It looks like you've implemented the
has_oneassociation incorrectly. The foreign key in ahas_one -- belongs_torelationship should go in the table corresponding to the model with thebelongs_todirective. Checkdb/schema.rb-- I think you'll find thatplan_idis defined in theuserstable. If you want theUsermodel to have onePlan, you'll need to removeplan_idfromusersand adduser_idtoplans.If you'd rather make it so a
Planhas oneUser, keep the schema as is and puthas_one :userinPlanandbelongs_to :planinUser.用户订阅一个计划。所以一个用户有一个计划，而一个计划又与许多用户相关。所以我想我做对了。错误发生在用户工厂。
替换
修复
了问题。
问题解决了！
A user subscribes to one plan. so a user has one plan and a plan is related to many users. So I think I got it right. the error was in the user factory.
replacing
by
fixed the issue.
Problem solved!