【发布时间】：2016-12-25 10:03:47
【问题描述】：
我想开始使用 ror，但这个问题似乎无法解决。我知道这个数据库错误有很多关于它的线程，但似乎没有一个解决方案可以解决。我现在整个下午都在论坛上搜索，没有成功。
我基本上只是执行教科书上的第一个任务，如下所示： 我使用
创建了一个新的 RoR 项目（Windows 10、SQLite3）rails new depot
然后我在这个项目中创建一个脚手架，代码如下：
rails generate scaffold Product title:string description:text image_url:string price:decimal
当我测试应用程序时，我得到了 db:migrate 错误。我尝试了rake db:migrate、db:rollback、db:drop，然后是db:create，我检查了迁移文件是否有错误，但似乎没有任何效果。
我认为解决方案应该很简单，因为应用程序在这种状态下应该尽可能简单，但我就是无法理解它出现的秘密。
正在等待迁移。要解决此问题，请运行：
bin/rails db:migrate RAILS_ENV=test
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.1/lib/active_record/migration.rb:586:in `load_schema_if_pending!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.1/lib/active_record/migration.rb:592:in `block in maintain_test_schema!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.1/lib/active_record/migration.rb:823:in `suppress_messages'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.1/lib/active_record/migration.rb:597:in `method_missing'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activerecord-5.0.1/lib/active_record/migration.rb:592:in `maintain_test_schema!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_help.rb:15:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `block in require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-5.0.1/lib/active_support/dependencies.rb:293:in `require'
from C:/Users/Flori/Desktop/bsp/test/test_helper.rb:3:in `<top (required)>'
from C:/Users/Flori/Desktop/bsp/test/controllers/products_controller_test.rb:1:in `require'
from C:/Users/Flori/Desktop/bsp/test/controllers/products_controller_test.rb:1:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/test_requirer.rb:11:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/test_requirer.rb:11:in `block in require_files'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/test_requirer.rb:10:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/test_requirer.rb:10:in `require_files'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:86:in `plugin_rails_init'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/minitest-5.10.1/lib/minitest.rb:80:in `block in init_plugins'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/minitest-5.10.1/lib/minitest.rb:78:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/minitest-5.10.1/lib/minitest.rb:78:in `init_plugins'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/minitest-5.10.1/lib/minitest.rb:129:in `run'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/minitest-5.10.1/lib/minitest.rb:62:in `block in autorun'
【问题讨论】：
-
运行
rake db:migrate时遇到什么错误？ -
总是，总是在这类问题中包含堆栈跟踪。
-
我在运行 rake db:migrate 时没有收到任何错误。我认为迁移成功了。
-
可能听起来很傻，但是你的 gemfile 中有 sqlite gem 吗？
标签： ruby-on-rails database windows sqlite3-ruby