左对齐简单形式中的“记住我”复选框+导轨中的引导

Question

我希望我的“记住我”复选框像正常复选框一样左对齐。

但是由于.form-control类的原因，它的超宽和居中。

Bootstrap docs显示输出HTML必须

<form role="form"> 
    ... 
    <div class="checkbox"> 
    <label> 
     <input type="checkbox"> Check me out 
    </label> 
    </div> 
    ... 
</form> 

但产量反而是

我调整我的simpleform初始化，但我不知道我需要调整进一步得到哪一个期望的行为。

输出HTML

<form id="new_user" class="simple_form new_user" novalidate="novalidate" method="post" action="/login" accept-charset="UTF-8"> 

<div class="form-group boolean optional user_remember_me"> 
    <label class="boolean optional control-label" for="user_remember_me"> 

     Remember me 

    </label> 
    <input type="hidden" value="0" name="user[remember_me]"></input> 
    <label class=""> 
     <input id="user_remember_me" class="boolean optional" type="checkbox" value="1" name="user[remember_me]"></input> 
    </label> 
    <div class="controls"></div> 
</div> 

下面是实际的文件：

设计new.html.slim

h2 Sign in 
= simple_form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| 
    .form-inputs 
    = f.input :remember_me, as: :boolean if devise_mapping.rememberable? 
    .form-actions 
    = f.button :submit, "Sign in" 
= render "devise/shared/links" 

simple_form.rb

# 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 the native HTML5 validations (novalidate form option). 
    # These validations are enabled in SimpleForm's internal config but disabled by default 
    # in this configuration, which is recommended due to some quirks from different browsers. 
    # To stop SimpleForm from generating the novalidate option, enabling the HTML5 validations, 
    # change this configuration to true. 
    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 

    # 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? 

    # Default class for inputs 
    # config.input_class = nil 

# 

    # Default class for inputs 
    config.input_class = 'form-control' 
end 

simple_form.bootstrap.rb

# Use this setup block to configure all options available in SimpleForm. 
SimpleForm.setup do |config| 
    config.wrappers :bootstrap, tag: 'div', class: 'form-group', error_class: 'error' do |b| 
    b.use :html5 
    b.use :placeholder 
    b.use :label 
    b.wrapper tag: 'div', class: 'controls' do |ba| 
     ba.use :input 
     ba.use :error, wrap_with: { tag: 'span', class: 'help-inline' } 
     ba.use :hint, wrap_with: { tag: 'p', class: 'help-block' } 
    end 
    end 


    # Wrappers for forms and inputs using the Twitter Bootstrap toolkit. 
    # Check the Bootstrap docs (http://twitter.github.com/bootstrap) 
    # to learn about the different styles for forms and inputs, 
    # buttons and other elements. 
    config.default_wrapper = :bootstrap 
end 

UPDATE：

更新simple_form宝石版3.1.0.rc1由接受的答案指出。在运行rails g simple_form:install和rails g simple_Form：install --bootstrap`后，新的配置初始化程序文件被更新。我的html输出更好，但复选框的小细节是垂直的，而不是内联。输出如下：

<div class="form-group boolean optional user_remember_me"> 

    <label class="boolean optional control-label" for="user_remember_me"> 

     Remember me 

    </label> 
    <div> 
     <input type="hidden" value="0" name="user[remember_me]"></input> 
     <label> 
      <input id="user_remember_me" class="boolean optional" type="checkbox" value="1" name="user[remember_me]"></input> 
     </label> 
    </div> 

</div> 

Answer 1

直到simple_form 3.1.0.rc1有没有支持引导3标记与simple_form。所以生成的HTML包含混合引导2和3类。引导程序3的正确标记应该看起来像

<div class='form-group'> 
    <div class="boolean input optional checkbox" id="user_remember_me_input"> 
     <input name="user[remember_me]" type="hidden" value="0" /> 
     <label class=" control-label" for="user_remember_me"> 
      <input id="user_remember_me" name="user[remember_me]" type="checkbox" value="1" /> 
      Remember me 
     </label> 
    </div> 
</div> 

Answer 2

它看起来像你添加默认的输入类的form-control所有输入。这意味着它会将该类添加到您可能不想要的输入，例如checkbox和select。 Bootstrap不打算在您的复选框上使用form-control。如果你愿意，你仍然可以保持这个设置，你只需要在表单中覆盖你的表格中的类，以获得特定的输入，如checkbox。

= f.input :remember_me, as: :boolean, label: false, inline_label: true, input_html: { class: 'something-other-than-form-control' } 

这是否适合您？顺便说一下，这是HAML。请相应调整。