【发布时间】：2015-08-26 11:32:17
【问题描述】：
我在 Windows Server 2012 R2 上的 IIS 8 上托管了一个 jRuby on Rails 应用程序（我知道，我一定是疯了）。经过大约 2 周的痛苦编程后，我有了一个可以工作的应用程序，但我正在尝试将其配置为通过 Microsoft JDBC SQL Server 驱动程序而不是默认的 sqlite3 数据库来使用 SQL Server 2012 Express。到目前为止，进展并不顺利。
配置完我的 database.yml 文件后，我尝试运行：bundle exec rake db:migrate RAILS_ENV=production --trace
我遇到了错误 rake aborted! NoMethodError: undefined method 'type' for "nvarchar(255)":String
A我的错误的完整轨迹如下所示：
rake db:迁移
C:\inetpub\wwwroot\rails>bundle exec rake db:migrate RAILS_ENV=production --trac
e
io/console not supported; tty will not be manipulated
io/console not supported; tty will not be manipulated
NOTE: ActiveRecord 4.2 is not (yet) fully supported by AR-JDBC, please help us f
inish 4.2 support - check http://bit.ly/jruby-42 for starters
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:migrate
rake aborted!
NoMethodError: undefined method `type' for "nvarchar(255)":String
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_methods/time_zone_conversion.rb:64:in `create_time_zone_conversion_attr
ibute?'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_methods/time_zone_conversion.rb:53:in `inherited'
org/jruby/RubyProc.java:271:in `call'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:61:in `matching'
org/jruby/RubyArray.java:2470:in `select'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:60:in `matching'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:56:in `decorators_for'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:47:in `apply'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:29:in `add_user_provided_columns'
org/jruby/RubyArray.java:2414:in `map'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttribute_decorators.rb:28:in `add_user_provided_columns'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttributes.rb:93:in `columns'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/a
ttributes.rb:98:in `columns_hash'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/q
uerying.rb:41:in `find_by_sql'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/r
elation.rb:638:in `exec_queries'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/r
elation.rb:514:in `load'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/r
elation.rb:243:in `to_a'
C:0:in `map'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:844:in `get_all_versions'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:985:in `migrated'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:990:in `ran?'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:967:in `runnable'
org/jruby/RubyArray.java:2640:in `reject!'
org/jruby/RubyArray.java:2611:in `reject'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:967:in `runnable'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:952:in `migrate'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:820:in `up'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/m
igration.rb:798:in `migrate'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/t
asks/database_tasks.rb:137:in `migrate'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/activerecord-4.2.2/lib/active_record/r
ailties/databases.rake:44:in `(root)'
org/jruby/RubyProc.java:271:in `call'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/task.rb:240:in `e
xecute'
org/jruby/RubyArray.java:1613:in `each'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/task.rb:235:in `e
xecute'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/task.rb:179:in `i
nvoke_with_call_chain'
C:/jruby-1.7.22/lib/ruby/1.9/monitor.rb:211:in `mon_synchronize'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/task.rb:172:in `i
nvoke_with_call_chain'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/task.rb:165:in `i
nvoke'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:15
0:in `invoke_task'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:10
6:in `top_level'
org/jruby/RubyArray.java:1613:in `each'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:10
6:in `top_level'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:11
5:in `run_with_threads'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:10
0:in `top_level'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:78
:in `run'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:17
6:in `standard_exception_handling'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/lib/rake/application.rb:75
:in `run'
C:/jruby-1.7.22/lib/ruby/gems/shared/gems/rake-10.4.2/bin/rake:33:in `(root)'
org/jruby/RubyKernel.java:1059:in `load'
C:\jruby-1.7.22\bin\rake:23:in `(root)'
Tasks: TOP => db:migrate
database.yml
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
pool: 5
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test.sqlite3
production:
adapter: sqlserver
database: smdb
url: jdbc:sqlserver://localhost;instanceName=SQLEXPRESS;databaseName=smdb;user=sa;password=password123;
宝石文件
source 'https://rubygems.org'
ruby '1.9.3', :engine => 'jruby', :engine_version => '1.7.22'
gem 'rails', '4.2.2'
gem 'bootstrap-sass', '3.2.0.0'
gem 'sass-rails', '5.0.2'
gem 'uglifier', '2.5.3'
gem 'coffee-rails', '4.1.0'
gem 'coffee-script-source', '1.8.0'
gem 'jquery-rails', '4.0.3'
gem 'turbolinks', '2.3.0'
gem 'jbuilder', '2.2.3'
gem 'faker', '1.4.2'
gem 'tzinfo-data', '1.2015.6'
gem 'sdoc', '0.4.0', group: :doc
group :development, :test do
gem 'activerecord-jdbcsqlite3-adapter', '1.3.17'
gem 'spring', '1.1.3'
end
group :test do
gem 'minitest-reporters', '1.0.5'
gem 'mini_backtrace', '0.1.3'
gem 'guard-minitest', '2.3.1'
end
group :production do
gem 'trinidad', '1.4.6'
gem 'deprecated', '3.0.1'
gem 'activerecord-jdbcmssql-adapter', '1.3.17'
end
最后是我的两个数据库迁移文件：
20150805101650_create_servers.rb
class CreateServers < ActiveRecord::Migration
def change
create_table :servers do |t|
t.string :server_name
t.string :application
t.string :server_role
t.string :team_contact
t.string :individual_contact
t.string :business_owner
t.string :vendor
t.string :vendor_contact
t.string :main_doc
t.string :main_win
t.timestamps null: false
end
end
end
20150805105953_add_index_to_server_name.rb
class AddIndexToServerName < ActiveRecord::Migration
def change
add_index :servers, :server_name, unique: true
end
end
我知道该实例正在被命中，因为我之前遇到了一个身份验证错误，自从我将用户名和密码添加到 jdbc 连接字符串后，该错误就消失了
解决方案
降级到 Rails 4.1.0，它似乎与 JDBC Adapter 更兼容。运行rake db:migrate RAILS_ENV=production 导致另一个错误。通过从 application.rb 中删除 config.active_record.raised_in_transactional_callbacks = true 解决了该错误
【问题讨论】：
标签： sql-server jdbc jruby ruby-on-rails-4.2 jrubyonrails