诗歌rails 之with_options Rails里有些方法使用一个Hash作为最后一个可选的参数,如果对多个方法有同样的选项,我们可以使用with_options来减少冗余: # models/user.rb with_options :if=> :should_validate_password?do|user| user.validates_presence_of :password user.validates_confirmation_for :password user.val...
是的,with_options仍然适用于Rails 3.试试这个:map.with_options :controller => 'foo', :via => :post do match 'one', :action => 'one' #automatically generates one_* helpers match 'two', :action => 'two' #automatically generates two_* helpers foo.with_options :special_flag...
create anewRails application:railsnewmyapp (wheremyappisthe application name)2. Change directory to myappand start the web server:cd myapp; rails server (run with --helpforoptions)3. Go to http://localhost:3000/ and you'll see:"Welcome aboard...
Devise 4.0 works with Rails 6.0 onwards. Run:bundle add deviseNext, you need to run the generator:rails generate devise:installAt this point, a number of instructions will appear in the console. Among these instructions, you'll need to set up the default URL options for the Devise mailer ...
(:datetime) .with_options(null: false) } it { should have_db_column(:password_digest).of_type(:string) } it { should have_db_column(:remember_token).of_type(:string) } it { should have_db_column(:admin).of_type(:boolean) .with_options(default: false) } it { should have_db_...
You have several options for getting the code.ForkIf you’d like to add features (or bug fixes) to improve the example application, you can fork the GitHub repo and make pull requests. Your code contributions are welcome!CloneIf you want to copy and customize the app with changes that ...
在Rails 5中使用options_for_select方法时,可能会遇到下拉提示错误的问题。这个错误通常是由于Rails 5中的新特性"Action View Form Helpers"引起的。 在Rails 5中,为了提高安全性,表单助手方法默认会自动为下拉列表添加一个空的选项。这个空选项的值为空字符串,用于防止用户绕过验证器并选择默认选项。 如果你...
map.with_options(:path_prefix => ":locale") do |m| m.resources :posts m.resources :stories end And you have to add before filter to application controller to define locale, such as before_filter :define_locale def define_locale if params[:locale] == nil I18n.locale = 'en' else ...
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config.default_options = { :print_media_type => trueend 但它给了我错误Nowkhtmltopdfe 浏览1提问于2012-08-23得票数0 回答已采纳 1回答 为什么邦德勒找不到服务器上的wkhtmltopdf 、、、 我正在使用pdfkit创业板,它正在使用来自wkhtmltopdf-二进制宝石的wkhtmltopdf进行开发。失败的方法是 @wkhtml...