小编use*_*363的帖子

对于下面的代码,如果用render或vise verse替换redirect_to会发生什么？

def create
  @product = Product.new(params[:product])

  respond_to do |format|
    if @product.save
      format.html { redirect_to(@product, :notice => 'Product was successfully created.') }

    else
      format.html { render :action => "new" }
    end
  end
end

似乎可以在上面的代码中替换另一个.是否只有redirect_to或render必须使用的地方？渲染除了渲染视图外什么都不做.Redirect_to向服务器发送302请求,重定向后当前参数丢失.

谢谢.

以下是在服务器上运行bundle install vendor/gems的错误:

Installing nokogiri (1.5.0) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /home/dtt/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
checking for libxml/parser.h... no
-----
libxml2 is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir …

在我们的rails rfq.js.coffee中,我们只有一个简单的js代码:

$(function() {
  $('#need_report').change(function(){
    if ($(this).val() == true) {
      $('#report_language').hide();
    }  // end if
  });  // end change()
});  // end ready(function)

但是,此代码会导致错误,指出第一行中的function()是保留字.由于第一行基本上是一个jquery $(document).ready(function () {}),我们不知道为什么会出现这个错误.有什么想法吗？非常感谢.

在simple_form视图中,提交按钮如下所示:

<%= f.button :submit, 'Save' %>

我们试图subaction在单击Save按钮时传递参数.在params[:subaction]点击该按钮后,应该有"更新"的价值.以下是我们在视图中尝试的但它不起作用:

<%= f.button :submit, 'Save', :subaction => 'update' %>

有没有办法在params[:subaction]单击Save按钮时传递值？

执行上限部署时出现以下错误:

*** [err :: 11.15.19.46] find: `/var/www/emclab/releases/20111208184942/public/images'
*** [err :: 11.15.19.46] : No such file or directory
*** [err :: 11.15.19.46] find: `/var/www/emclab/releases/20111208184942/public/stylesheets': No such file or directory
*** [err :: 11.15.19.46] find: `/var/www/emclab/releases/20111208184942/public/javascripts'
*** [err :: 11.15.19.46] : No such file or directory

有什么想法导致错误吗？谢谢.

在我们的rails 3.2.12应用程序中,有一个rake task创建下lib/tasks.在rake task需要调用一个方法find_config(),其驻留在另一个导轨模块authentify(模块不是/ lib下/).我们可以include Authentify在rake task做出方法find_config()可以在rake任务打电话？

以下是我们想要做的事情rake task:

include Authentify
config = Authentify::find_config()

感谢您的评论.

这是Rails 4.2应用程序的app/assets /.

有3个bootstraps js和css文件.部署到生产(ubuntu 12.1)后,资产预编译在服务器上完成(部署在suburi下):

RAILS_ENV=production bundle exec rake assets:precompile RAILS_RELATIVE_URL_ROOT=/mysuburi

这是production.rb:

  config.cache_classes = true
  config.eager_load = true
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true
  config.serve_static_files = false #ENV['RAILS_SERVE_STATIC_FILES'].present?
  config.assets.compress = true
  config.assets.js_compressor = :uglifier
  config.assets.compile = false
  config.assets.digest = true
  config.log_level = :debug
  config.i18n.fallbacks = true
  config.active_support.deprecation = :notify
  config.log_formatter = ::Logger::Formatter.new
  config.active_record.dump_schema_after_migration = false

以下是负责人application.css.scss:

@import "bootstrap.min.css";
@import "bootstrap-theme.min.css";

@import "simple_form.css.scss";
@import "user_menus.css.scss";

在application.js,它有:

//= require bootstrap.min

以下是lspublic/assets/on production服务器的输出:

application-05cf37813d76c2bd659271403789374cc118f1a4e616ec220969577b79ff6514.css …

我正在为具有可运行的 android 版本的 React Native (0.61) 应用程序设置 IOS 开发。我所做的是在通过以下在线帖子（已安装 xcode 命令行工具 10.2）设置 React Native 环境后复制组件的 src 和 package.json 文件。但是启动 run-ios 失败了：

$ react-native run-ios
error Could not find "Podfile.lock" at /Users/mine/Documents/code/js/emps_fe6/ios/Podfile.lock. Did you run "pod install" in iOS directory?
error Could not find the following native modules: RNCAsyncStorage, RNDeviceInfo, RNGestureHandler, RNKeychain, BVLinearGradient, RNLocalize, RNReanimated, RNVectorIcons, react-native-video. Did you forget to run "pod install" ?
info Found Xcode project "emps_fe6.xcodeproj"
xcrun: error: unable to find utility "simctl", not a developer tool …

似乎reordering columns在a中并不简单sqlite3 table.至少sqlite managerin firefox不支持此功能.例如,将column2移动到column3并将column5移动到column2.有没有办法重新排序sqlite表中的列,使用sqlite管理软件或脚本？谢谢.

对于 React Native 0.70.1/Xcode 14/Monterey M1出现奇怪的错误npx react-native run-ios：

The following build commands failed:
    SwiftEmitModule normal arm64 Emitting\ module\ for\ YogaKit (in target 'YogaKit' from project 'Pods')

然而，Xcode 14 中的构建成功，没有任何错误。尝试在调试的构建设置中排除arm64（当前是i386），但没有解决。还在 pod 文件中添加以下块，但也没有修复：

   installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
      # some older pods don't support some architectures, anything over iOS 11 resolves that
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
      end
    end