RSpec,Rails 4,Postgres,UUID主键：使用Rake RSpec,id为null,但在RSpec或控制台中可以正常使用

我正在尝试使用UgID主键来运行Postgres和Rails 4.0.0.rc2的模型,但我的规格无法创建和销毁,但MyThing.create或MyThing#destroy在rails控制台上工作正常(在开发和测试环境中). …直到我运行规范,在这种情况下,通过控制台停止工作.因此,当我运行我的规范改变我的数据库并禁止UUID密钥继续工作时,它看起来就像发生了什么.

HALP？

我按照this blog post生成了我的迁移,因此我的模式如下所示：

ActiveRecord::Schema.define(version: 20130613174601) do
  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"
  enable_extension "uuid-ossp"

  create_table "growers",id: false,force: true do |t|
    t.uuid     "id",null: false
    t.string   "name"
    t.string   "code"
    t.datetime "created_at"
    t.datetime "updated_at"
  end
end

这是事物的进展：

创建：
$rake db：创建RAILS_ENV = test

迁移：

$rake db:migrate RAILS_ENV=test
==  CreateGrowers: migrating ==================================================
-- enable_extension("uuid-ossp")
   -> 0.0052s
-- create_table(:growers,{:id=>:uuid})
   -> 0.0043s
==  CreateGrowers: migrated (0.0096s) =========================================

创建模型对象：

$rails c test
agrian> g = Grower.create name: 'bobo'
   (0.3ms)  BEGIN
  sql (4.1ms)  INSERT INTO "growers" ("created_at","name","updated_at") VALUES ($1,$2,$3) RETURNING "id"  [["created_at",Tue,18 Jun 2013 20:22:39 UTC +00:00],["name","bobo"],["updated_at",18 Jun 2013 20:22:39 UTC +00:00]]
   (0.4ms)  COMMIT
=> #<Grower id: "38f84f39-e52e-4664-b776-4fdfcbd60b09",name: "bobo",code: nil,created_at: "2013-06-18 20:22:39",updated_at: "2013-06-18 20:22:39">

(大喜)

运行规格：

$rake spec
/Users/sloveless/.rbenv/versions/2.0.0-p195/bin/ruby -S rspec ./spec/controllers/api/v1/growers_controller_spec.rb ./spec/helpers/growers_helper_spec.rb ./spec/models/grower_spec.rb ./spec/requests/api/v1/growers_spec.rb ./spec/routing/api/v1/growers_routing_spec.rb
...............FF..........F.*
(other stuff)
Finished in 0.30626 seconds
30 examples,3 failures,1 pending

创建模型对象：

$rails c test
Loading test environment (Rails 4.0.0.rc2)
agrian> g = Grower.create name: 'bobo'
   (0.4ms)  BEGIN
  sql (3.5ms)  INSERT INTO "growers" ("created_at",$3)  [["created_at",18 Jun 2013 20:29:36 UTC +00:00],18 Jun 2013 20:29:36 UTC +00:00]]
PG::Error: ERROR:  null value in column "id" violates not-null constraint
DETAIL:  Failing row contains (null,bobo,null,2013-06-18 20:29:36.773391,2013-06-18 20:29:36.773391).
: INSERT INTO "growers" ("created_at",$3)
   (0.2ms)  ROLLBACK
ActiveRecord::StatementInvalid: PG::Error: ERROR:  null value in column "id" violates not-null constraint
DETAIL:  Failing row contains (null,$3)
from /Users/sloveless/.rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0.rc2/lib/active_record/connection_adapters/postgresql_adapter.rb:780:in `get_last_result'

(悲伤的脸)

有人可以指出我在这方面正确的方向,我的数据库可能做什么愚蠢的事情？

更新：我可以一遍又一遍地运行bin / rspec规范(所有我的规范都通过).如果我运行rake规范,我会失败,然后下次运行bin / rspec规范时我会失败.

编辑：更新标题以反映rake rspec问题,而不仅仅是rspec.

解决方法

我看到rspec-rails / lib / rspec / rails / tasks / rspec.rake为spec任务定义了这个：

spec_prereq = Rails.configuration.generators.options[:rails][:orm] == :active_record ?  "test:prepare" : :noop
task :noop do; end
task :default => :spec

# other stuff

desc "Run all specs in spec directory (excluding plugin specs)"
RSpec::Core::RakeTask.new(:spec => spec_prereq)

…运行：

> db：load_config
> db：test：purge
> db：test：load
> db：test：load_schema
> db：schema：load

我看到,当运行rake db：schema：load时,我得到：

-- enable_extension("plpgsql")
   -> 0.0161s
-- enable_extension("uuid-ossp")
   -> 0.0063s
-- create_table("growers",{:id=>false,:force=>true})
   -> 0.0049s
-- initialize_schema_migrations_table()
   -> 0.0062s

…与运行迁移时不同：

==  CreateGrowers: migrating ==================================================
-- enable_extension("uuid-ossp")
   -> 0.0050s
-- create_table(:growers,{:id=>:uuid})
   -> 0.0052s
==  CreateGrowers: migrated (0.0103s) =========================================

因此,在我看来,db：schema：load任务不会创建具有UUID主键的表,从而导致失败.好像是一个Rails bug？

更新：我想我会发现它是否是一个Rails错误：Issue 11016