'const_missing'：未初始化常量 Time::DATE_FORMATS (NameError)

Question

当我尝试运行一些 ruby​​ 单元测试时遇到问题。

我在哈德逊得到以下堆栈：

/home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/ext/module.rb:36:in `const_missing': uninitialized constant Time::DATE_FORMATS (NameError)
    from /home/cpcaserver5/.hudson/jobs/SVN/workspace/Hermodr/trunk/server/config/environment.rb:2:in `<top (required)>'
    from /home/cpcaserver5/.hudson/jobs/SVN/workspace/Hermodr/trunk/server/test/test_helper.rb:2:in `require'
    from /home/cpcaserver5/.hudson/jobs/SVN/workspace/Hermodr/trunk/server/test/test_helper.rb:2:in `<top (required)>'
    from /home/cpcaserver5/.hudson/jobs/SVN/workspace/Hermodr/trunk/server/test/unit/group_test.rb:1:in `require'
    from /home/cpcaserver5/.hudson/jobs/SVN/workspace/Hermodr/trunk/server/test/unit/group_test.rb:1:in `<top (required)>'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:10:in `require'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:10:in `block (2 levels) in <main>'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:9:in `each'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:9:in `block in <main>'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:4:in `select'
    from /home/cpcaserver5/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2.2/lib/rake/rake_test_loader.rb:4:in `<main>'
rake aborted!
Command failed with status (1): [/home/cpcaserver5/.rvm/rubies/ruby-1.9.2-p...]

Answer 1

Rails 支持多种日期格式，通常在初始化器/time.rb 中的初始化器中声明 - 例如：

Date::DATE_FORMATS[:short_date] = "%b %d, %Y"
Date::DATE_FORMATS[:full_date] = "%A, %B %d, %Y"
Time::DATE_FORMATS[:short_slashed] = "%m/%d/%Y %I:%M %p"
Time::DATE_FORMATS[:short_date] = "%b %d, %Y"

这允许 date.to_s(:short_date) 格式化日期输出。但是，您的错误输出表明该文件尚未被读取，并且由于我在堆栈跟踪中没有看到任何指示 Rails 的输出，我想知道是否已加载任何 Rails 文件。