我需要查询一天内发表的评论.该字段是标准时间戳的一部分,是created_at.所选日期来自date_select.我如何使用ActiveRecord来做到这一点？
我需要像这样的东西:
"SELECT * FROM comments WHERE created_at BETWEEN '2010-02-03 00:00:00' AND '2010-02-03 23:59:59'"
我正在运行Rails 2.3.5应用程序,在运行脚本/服务器时,我显示以下内容:
./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path': undefined method `source_index' for Gem:Module (NoMethodError)
from ./script/../config/boot.rb:60:in `load_initializer'
from ./script/../config/boot.rb:44:in `run'
from ./script/../config/boot.rb:17:in `boot!'
from ./script/../config/boot.rb:123
from script/server:2:in `require'
from script/server:2
如果我在boot.rb(Rails :: GemDependency.add_frozen_gem_path)中注释掉第60行并运行脚本/服务器,我会得到:
=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path': undefined method `source_index' for Gem:Module (NoMethodError)
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:298:in `add_gem_load_paths'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:132:in `process'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:113:in `send'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:113:in `run'
from /home/developer/bigpink/config/environment.rb:13
from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /home/developer/bigpink/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
from /home/developer/bigpink/vendor/rails/railties/lib/commands/server.rb:84
from script/server:3:in `require'
from script/server:3 …我有以下development.yml文件的开发部分:
development:
adapter: postgresql
host: localhost
database: testtb
username: app_user
password: ENV['APP_USER_POSTGRES_PASSWORD'] <= Troublesome line
当我打开一个rails控制台bundle exec rails console并键入时,ENV['APP_USER_POSTGRES_PASSWORD']我会回到我在本地配置文件中指定的数据库密码.但是,当我启动我的rails服务器时,它无法连接到数据库,失败了
PGError FATAL: password authentication failed for user "app_user"
这是以前的工作,当我用纯文本输入数据库密码,而不是试图通过它来访问它ENV['...'],但出于显而易见的原因,我想完全保留这个文件的实际密码(因此在代码库之外)同时仍然能够对文件进行其他非安全更改database.yml.
我缺少的语法有什么特别之处,或者database.yml在加载文件时由于某种原因环境变量不可用？
我在路径文件中添加了:
map.show_book "/show_book/:name/year/:year", :controller => "book", :action => "show_version"
我还补充说:
map.show_book "/show_book/:name", :controller => "book", :action => "show_version"
显示最新的书而不指定年份.
但它不起作用,如果我没有过年,它就无法在"show_book/NAME"中找到路线.
你有一些想法为什么它不起作用？
谢谢 !
PS.我知道我可以使用year作为"？year = XXXX"的参数,但我想将年份用作URL的一部分
我想检查我的对象何时@objectname不等于null以显示@objectnameelse 的值以显示未找到任何值.
我试过这个:
<% if (@objectname != null) then %>
但我收到了一个错误.
我正在尝试让我的自定义验证工作create.但是,当我做了find,然后save,轨道把它当作create和运行自定义验证.如何在仅在更新找到的记录时创建新记录时才能获得验证？
我正在使用Rails 2.3.5,如果我给出Model.find(1),如果1不在数据库中,则返回ActiveRecord错误.它应该nil像在案件中一样返回Model.find_by_column('..')吗？
在ruby on rails中,在执行session[:foo] = nil它时会留下:foo在会话对象中命名的条目.如何从会话对象中删除单个条目？
我有一个视图,我从中向控制器发出ajax请求,并在操作成功完成后初始化flash.now [:notice].但在控制回到视图之后.我没碰巧看到flash消息.
flash.now[:notice] = "Request Completed successfully" if @meetings.any?
我正在尝试使用Ubuntu 10.04服务器,sphinx,myql2版本0.2.7和percona服务器5.5(Myslql 5.5)运行Rails两个应用程序.irb中的mysql2工作正常,我可以连接到db.这个rails 2应用程序正在另一个带有MySql 5.1的Centos服务器上运行.当我跑:
script/server -e production
我明白了:
mysql2.so:libmysqlclient_r.so.15:无法打开共享对象文件:没有这样的文件或目录
这是我的libs:
# ls -l /usr/lib |grep sql
-rw-r--r-- 1 root root 10581008 2011-11-18 16:51 libmysqlclient.a
lrwxrwxrwx 1 root root 16 2011-12-10 05:48 libmysqlclient_r.a -> libmysqlclient.a
lrwxrwxrwx 1 root root 20 2011-12-10 05:48 libmysqlclient.so -> libmysqlclient.so.16
lrwxrwxrwx 1 root root 29 2011-12-10 06:01 libmysqlclient.so.15 -> /usr/lib/libmysqlclient.so.16
-rw-r--r-- 1 root root 7332 2011-11-18 16:44 libmysqlservices.a
-rw-r--r-- 1 root root 562520 2010-02-08 06:59 libsqlite3.a
-rw-r--r-- 1 root root 973 2010-02-08 06:59 libsqlite3.la
lrwxrwxrwx …