我是Rails的新手，并且正在为我的雇主构建一个简单的项目跟踪应用程序。我一直在Mac上开发该应用程序，并将其推送到github。我只是设法将github存储库克隆到公司防火墙后面的Windows盒中，希望让同事试用该应用程序。
但是，当我转到rake db:migrate在Windows框中初始化数据库时，出现以下错误消息:
$ rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
Could not find table 'projects'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/connection_adapters/sqlite3_adapter.rb:29:in `table_structure'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/faker-0.3.1/lib/extensions/object.
rb:3:in `returning'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/connection_adapters/sqlite3_adapter.rb:28:in `table_structure'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/connection_adapters/sqlite_adapter.rb:228:in `columns'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/base.rb:1271:in `columns'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/base.rb:1279:in `columns_hash'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/base.rb:1578:in `find_one'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/base.rb:1569:in `find_from_ids'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_reco
rd/base.rb:616:in `find'
c:/Rails_Projects/molex_app/config/routes.rb:15
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_contro
ller/routing/route_set.rb:226:in `draw'
c:/Rails_Projects/molex_app/config/routes.rb:1
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:145:in `load_without_new_constant_marking'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:145:in `load'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:521:in `new_constants_in'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:145:in `load'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_contro
ller/routing/route_set.rb:286:in `load_routes!'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_contro
ller/routing/route_set.rb:286:in `each'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_contro
ller/routing/route_set.rb:286:in `load_routes!'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_contro
ller/routing/route_set.rb:266:in `reload!'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:537
:in `initialize_routing'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:188
:in `process'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113
:in `send'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113
:in `run'
c:/Rails_Projects/molex_app/config/environment.rb:9
c:/RubyonRails/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `
gem_original_require'
c:/RubyonRails/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `
require'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:156:in `require'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:521:in `new_constants_in'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_sup
port/dependencies.rb:156:in `require'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/misc.rake:4
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `cal
l'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `exe
cute'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `eac
h'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `exe
cute'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:578:in `inv
oke_with_call_chain'
c:/RubyonRails/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in `inv
oke_with_call_chain'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:588:in `inv
oke_prerequisites'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in `eac
h'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:585:in `inv
oke_prerequisites'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:577:in `inv
oke_with_call_chain'
c:/RubyonRails/Ruby187/lib/ruby/1.8/monitor.rb:242:in `synchronize'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in `inv
oke_with_call_chain'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:564:in `inv
oke'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2019:in `in
voke_task'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `to
p_level'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `ea
ch'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `to
p_level'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `st
andard_exception_handling'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in `to
p_level'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `ru
n'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `st
andard_exception_handling'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `ru
n'
c:/RubyonRails/Ruby187/lib/ruby/gems/1.8/gems/rake-0.8.3/bin/rake:31
c:/RubyonRails/Ruby187/bin/rake:19:in `load'
c:/RubyonRails/Ruby187/bin/rake:19
我的 gem list 如下所示:
$ gem list
*** LOCAL GEMS ***
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.5)
activeresource (2.3.5)
activesupport (2.3.5)
faker (0.3.1)
rack (1.0.1, 1.0.0)
rails (2.3.5)
rake (0.8.3)
sqlite3-ruby (1.3.0 x86-mingw32)
will_paginate (2.3.12)
我在Windows框中的schema.rb文件如下所示:
# This file is auto-generated from the current state of the database. Instead of editing this file,
# please use the migrations feature of Active Record to incrementally modify your database, and
# then regenerate this schema definition.
#
# Note that this schema.rb definition is the authoritative source for your database schema. If you need
# to create the application database on another system, you should be using db:schema:load, not running
# all the migrations from scratch. The latter is a flawed and unsustainable approach (the more migrations
# you'll amass, the slower it'll run and the greater likelihood for issues).
#
# It's strongly recommended to check this file into your version control system.
ActiveRecord::Schema.define(:version => 20100915193510) do
create_table "assets", :force => true do |t|
t.integer "project_id"
t.datetime "created_at"
t.datetime "updated_at"
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
end
create_table "macroposts", :force => true do |t|
t.text "content"
t.integer "user_id"
t.integer "project_id"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "projects", :force => true do |t|
t.string "title"
t.integer "status", :limit => 255
t.integer "program_manager_id"
t.integer "design_engineer_id"
t.string "sales_engineer"
t.string "customer"
t.string "market_size"
t.string "project_code"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "projects", ["design_engineer_id"], :name => "index_projects_on_design_engineer_id"
add_index "projects", ["program_manager_id"], :name => "index_projects_on_program_manager_id"
create_table "statuses", :force => true do |t|
t.string "status_name"
t.integer "status_code"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "users", :force => true do |t|
t.string "name"
t.string "email"
t.datetime "created_at"
t.datetime "updated_at"
t.string "encrypted_password"
t.string "salt"
t.string "remember_token"
t.boolean "admin", :default => false
t.string "avatar_file_name"
t.string "avatar_content_type"
t.integer "avatar_file_size"
t.datetime "avatar_updated_at"
end
add_index "users", ["email"], :name => "index_users_on_email", :unique => true
add_index "users", ["remember_token"], :name => "index_users_on_remember_token"
end
由于这是我第一次在此计算机上运行迁移，因此我希望迁移过程中的任何内容在创建之前都不应尝试访问“项目”表。但是我注意到，直到几个与之关联的表( Assets ，宏帖子)之后，schema.rb中才列出“项目”表。这是问题的根源吗？
还是在这里有某种 gem 依赖问题？我注意到，“faker” gem出现在错误列表的顶部，即使我在测试中什至没有真正使用它(从Michael Hartl的RailsTutorial.org复制)。
感谢您提供的任何帮助或建议!
院长理查森
Genlighten.com
最佳答案
在过去的几个星期中，我一直在进行的一个辅助项目中遇到了这个确切的问题。当我用rake db:migrate运行--trace.时，答案才对我很清楚。在那里，我注意到堆栈跟踪提示factory_girl无法实例化丢失的表项。
我进入了factory.rb文件并删除了有问题的模型，之后我就可以运行rake db:migrate了。另外，对我来说，问题是:
Factory.define :table1 do |b|
b.name "table1"
b.rating 5
b.table2_relation Factory(:table2)
end
在这种情况下，工厂内部的工厂正试图在 rake 任务期间插入。由于该表不存在，所以它被炸掉了。在一点帮助下，我发现执行此操作的正确方法是:
Factory.define :table1 do |b|
b.name "table1"
b.rating 5
b.table2_relation {Factory(:table2)}
end
关于ruby-on-rails - rake db :migrate produces "rake aborted! could not find table" error，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3761622/