请安装 postgresql 适配器：`gem install activerecord-postgresql-adapter`
可能的重复：
如何处理 Ruby on Rails错误：“请安装 postgresql 适配器：`gem install activerecord-postgresql-adapter'”
我正在尝试让 Redmine 与 postgres 一起使用。
在我的日志中我不断看到。
Please install the postgresql adapter: `gem install activerecord-postgresql-adapter`
谷歌搜索后，每个人都说你需要做 gem install pg。但是当我做 gem list 时，
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.8, 2.3.5)
activeresource (2.3.5)
activesupport (2.3.8, 2.3.5)
fastthread (1.0.7)
passenger (2.2.15)
pg (0.9.0)
postgres (0.7.9.2008.01.28)
postgres-pr (0.6.3)
rack (1.0.1)
rails (2.3.5)
rake (0.8.7)
你可以清楚地看到 pg 已经安装了。还有其他人发现或解决了这个问题吗？
Possible Duplicate:
How to handle Ruby on Rails error: “Please install the postgresql adapter: `gem install activerecord-postgresql-adapter'”
I'm trying to get Redmine working with postgres.
In my logs I keep seeing.
Please install the postgresql adapter: `gem install activerecord-postgresql-adapter`
After googling everyone said you needed to do gem install pg. But when I do gem list
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.8, 2.3.5)
activeresource (2.3.5)
activesupport (2.3.8, 2.3.5)
fastthread (1.0.7)
passenger (2.2.15)
pg (0.9.0)
postgres (0.7.9.2008.01.28)
postgres-pr (0.6.3)
rack (1.0.1)
rails (2.3.5)
rake (0.8.7)
You can clearly see that pg is already installed. Has anyone else found this issue or fixed it?
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确保database.yml中的数据库适配器设置为“postgresql”。如果您仍然遇到同样的问题，请尝试使用 pure-ruby 适配器：（
确保您之前卸载了 pg gem...以避免冲突）
如果它有效，那么这是 postgres gem 的问题。无论如何，出于开发目的，使用纯红宝石宝石通常是可以的。
make sure your db-adapter in database.yml is set to "postgresql". If still you have the same problem, then try using the pure-ruby adapter:
(make sure you uninstall the pg gem before... to avoid conflicts)
If it works, then it's a problem with the postgres gem. Anyway, for development purposes, using the pure-ruby gem is usually ok.
我对 ruby-pg gem 有更多的运气
我尝试了许多其他 gems 'postgres', 'pg', 'postgres-pr' 但没有运气
我的环境是Ubuntu 10.4，ruby enterprise 1.8.7
ruby-pg为我解决了上述问题
I had more luck with the ruby-pg gem
I tried a number of the other gems 'postgres', 'pg', 'postgres-pr' with no luck
My environment was Ubuntu 10.4, ruby enterprise 1.8.7
ruby-pg resolved the above issue for me
对于 Debian scrape 来说是：
for debian squeeze it is:
当您在 database.yml 中错误输入适配器名称（例如“postrgesql”而不是“postgresql”）时，使用 Postgres 和 pg 的 Rails 3.0.4 中可能会出现类似（几乎相同）的错误：
请安装 postrgesql 适配器：
gem install activerecord-postrgesql-adapter（没有要加载的文件 - active_record/connection_adapters/postrgesql_adapter）Similar (almost identical) errors can arise in Rails 3.0.4 with Postgres and pg, when you mistype the adapter name in your database.yml, for instance "postrgesql" instead of "postgresql":
Please install the postrgesql adapter:
gem install activerecord-postrgesql-adapter(no such file to load -- active_record/connection_adapters/postrgesql_adapter)在带有 Rails 2.3.4 的 Windows 7 上为我工作
worked for me on Windows 7 with Rails 2.3.4
我从未使用过 postgre sql gem，但我之前通过将其添加到 config/preinitializer.rb 中解决了类似的错误。
注意：您必须使用自己的宝石位置。通常你可以通过运行
gem环境来找到它们。您可能还会在这里找到一些有用的答案：
如何处理 Ruby on Rails 错误：“请安装 postgresql 适配器：`gem install activerecord-postgresql-adapter'”
I never worked with postgre sql gem, but I've solved similar error before by adding this into config/preinitializer.rb.
Note: you'll have to use your own gem locations. Usually you can find them by running
gem environment.You may also find some answers here useful:
How to handle Ruby on Rails error: "Please install the postgresql adapter: `gem install activerecord-postgresql-adapter'"