Ruby on rails Rails数据库迁移错误

我想开始ror，但这个问题似乎无法解决。我知道有很多关于这个数据库错误的线索，但是没有一个解决方案是可行的。我现在整个下午都在论坛上搜索，没有成功

我基本上只是完成课本上的第一个任务，如下所示： 我创建了一个新的RoR项目Windows 10、SQLite3和

rails new depot

然后，我使用以下代码在该项目中创建了一个脚手架：

rails generate scaffold Product title:string description:text image_url:string price:decimal

在测试应用程序时，我得到了db:migrate错误。我尝试了rakedb: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非常简单，因为应用程序应该在这种状态下尽可能地不复杂，但我无法隐藏它所显示的秘密

迁移挂起。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'

---

切换您的服务器，然后运行

rake db:drop db:create db:migrate 

---

这必须解决您的问题

运行rake db:migrate时会出现什么错误？始终，始终将stacktrace包含在此类问题中。我在运行rake db:migrate时不会出现任何错误。我认为迁移成功了。听起来可能很傻，但是sqlite gem在您的gem文件中吗？