如何在simple_form中使用占位符而不是标签？

我想在我的应用程序中使用占位符而不是标签。 我使用的是simple_form和Rails（3.2.14）。 如何在simple_form配置文件中指定使用占位符而不是标签。

在Initializers中有一个文件simple_form.rb即

# Use this setup block to configure all options available in SimpleForm. SimpleForm.setup do |config| # Wrappers are used by the form builder to generate a # complete input. You can remove any component from the # wrapper, change the order or even add your own to the # stack. The options given below are used to wrap the # whole input. config.wrappers :default, :class => :input, :hint_class => :field_with_hint, :error_class => :field_with_errors do |b| ## Extensions enabled by default # Any of these extensions can be disabled for a # given input by passing: `f.input EXTENSION_NAME => false`. # You can make any of these extensions optional by # renaming `b.use` to `b.optional`. # Determines whether to use HTML5 (:email, :url, ...) # and required attributes b.use :html5 # Calculates placeholders automatically from I18n # You can also pass a string as f.input :placeholder => "Placeholder" b.use :placeholder ## Optional extensions # They are disabled unless you pass `f.input EXTENSION_NAME => :lookup` # to the input. If so, they will retrieve the values from the model # if any exists. If you want to enable the lookup for any of those # extensions by default, you can change `b.optional` to `b.use`. # Calculates maxlength from length validations for string inputs b.optional :maxlength # Calculates pattern from format validations for string inputs b.optional :pattern # Calculates min and max from length validations for numeric inputs b.optional :min_max # Calculates readonly automatically from readonly attributes b.optional :readonly ## Inputs b.use :label_input b.use :hint, :wrap_with => { :tag => :span, :class => :hint } b.use :error, :wrap_with => { :tag => :span, :class => :error } end # The default wrapper to be used by the FormBuilder. config.default_wrapper = :default # Define the way to render check boxes / radio buttons with labels. # Defaults to :nested for bootstrap config. # :inline => input + label # :nested => label > input config.boolean_style = :nested # Default class for buttons config.button_class = 'btn' # Method used to tidy up errors. Specify any Rails Array method. # :first lists the first message for each field. # Use :to_sentence to list all errors for each field. # config.error_method = :first # Default tag used for error notification helper. config.error_notification_tag = :div # CSS class to add for error notification helper. config.error_notification_class = 'alert alert-error' # ID to add for error notification helper. # config.error_notification_id = nil # Series of attempts to detect a default label method for collection. # config.collection_label_methods = [ :to_label, :name, :title, :to_s ] # Series of attempts to detect a default value method for collection. # config.collection_value_methods = [ :id, :to_s ] # You can wrap a collection of radio/check boxes in a pre-defined tag, defaulting to none. # config.collection_wrapper_tag = nil # You can define the class to use on all collection wrappers. Defaulting to none. # config.collection_wrapper_class = nil # You can wrap each item in a collection of radio/check boxes with a tag, # defaulting to :span. Please note that when using :boolean_style = :nested, # SimpleForm will force this option to be a label. # config.item_wrapper_tag = :span # You can define a class to use in all item wrappers. Defaulting to none. # config.item_wrapper_class = nil # How the label text should be generated altogether with the required text. # config.label_text = lambda { |label, required| "#{required} #{label}" } # You can define the class to use on all labels. Default is nil. config.label_class = 'control-label' # You can define the class to use on all forms. Default is simple_form. # config.form_class = :simple_form # You can define which elements should obtain additional classes # config.generate_additional_classes_for = [:wrapper, :label, :input] # Whether attributes are required by default (or not). Default is true. # config.required_by_default = true # Tell browsers whether to use default HTML5 validations (novalidate option). # Default is enabled. config.browser_validations = false # Collection of methods to detect if a file type was given. # config.file_methods = [ :mounted_as, :file?, :public_filename ] # Custom mappings for input types. This should be a hash containing a regexp # to match as key, and the input type that will be used when the field name # matches the regexp as value. # config.input_mappings = { /count/ => :integer } # Custom wrappers for input types. This should be a hash containing an input # type as key and the wrapper that will be used for all inputs with specified type. # config.wrapper_mappings = { :string => :prepend } # Default priority for time_zone inputs. # config.time_zone_priority = nil # Default priority for country inputs. # config.country_priority = nil # Default size for text inputs. # config.default_input_size = 50 # When false, do not use translations for labels. # config.translate_labels = true # Automatically discover new inputs in Rails' autoload path. # config.inputs_discovery = true # Cache SimpleForm inputs discovery # config.cache_discovery = !Rails.env.development? end 

Answer 1

您需要3个步骤才能自动显示占位符而不是标签，并且需要执行更多配置。

1. 确保b.use :placeholder在simple_form.rb中

2. 确保b.use :input而不是b.use :label_input

3. 最重要的是，修改你的simple_form.en.yml：

于：

简单的forms：

“是的是的’

“不，不’

需要：

文字：’必填’

标记：’*’

占位符：

用户：

名称：’名称’

在您的页面中：

 <%= simple_form_for @user do |f|%> <%= f.input :name%> <% end%> 

每个占位符都需要在此处定义，否则将无法显示。

Answer 2

simple_form允许您通过将label:false传递给每个输入来隐藏单个标签。 例如： <%= f.input :email, placeholder: 'Email', label:false %>将隐藏表单中电子邮件输入的标签。

Answer 3

您只需在initializers / simple_form.rb中更改：

 ## Inputs b.use :label_input 

至

 ## Inputs b.use :input 

并且，在您的视图中，只需使用attribute：placeholder而不是：label

Answer 4

启用引导程序的表单的解决方案

为了使这与Bootstrap一起使用，我必须更新simple_form_bootstrap.rb并注释掉配置中的b.use :label条目，包括vertical_form和horizontal_form ：

 #b.use :label, class: 'control-label' b.use :placeholder 

然后，当@Bigxiang正确提到占位符时，所有人都需要在simple_form.{LANG}.yml定义一个值simple_form.{LANG}.yml 。

 en: placeholders: defaults: first_name: First name last_name: Last name user: email: Email 

请注意，在使用通用defaults转换时，您不必指定模型，例如我的示例中的first_name ， last_name 。