ruby-on-rails - NameError: 未初始化的常量 ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::TableDefinition

Question

生成了 rails 4.2.0 应用程序并添加了 activerecord-postgis-adapter 并相应地编辑了 database.yml 文件。

但是现在当我这样做时rake db:create ，它因错误而崩溃:

± be rake db:create                                                                                                         2.1.0
rake aborted!
NameError: uninitialized constant ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::TableDefinition
/Users/millisami/Railsapps/showme/config/application.rb:16:in `<top (required)>'
/Users/millisami/Railsapps/showme/Rakefile:4:in `require'
/Users/millisami/Railsapps/showme/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)

Answer 1

显然，activerecord-postgis-adapter gem 是 not yet compatible with ActiveRecord 4.2 .

要么使用标准 pg gem(由 ActiveRecord 本地支持)，或降级到 4.1。