Rails-Engine-simple_form配置规范

使用simple_form 主要也是为了方便，大多数情况下，我们使用的wrappers都是默认的 bootstrap: vertical_form

正常的 config/initializers/simple_form_bootstrap.rb

SimpleForm.setup do |config|
  config.error_notification_class = 'alert alert-danger'
  config.button_class = 'btn btn-default'
  config.boolean_label_class = nil

  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: 'control-label'

    b.use :input, class: 'form-control'
    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :readonly
    b.use :label, class: 'control-label'

    b.use :input
    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly

    b.wrapper tag: 'div', class: 'checkbox' do |ba|
      ba.use :label_input
    end

    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly
    b.use :label, class: 'control-label'
    b.use :input
    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input, class: 'form-control'
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :readonly
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly

    b.wrapper tag: 'div', class: 'col-sm-offset-3 col-sm-9' do |wr|
      wr.wrapper tag: 'div', class: 'checkbox' do |ba|
        ba.use :label_input, class: 'col-sm-9'
      end

      wr.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      wr.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly

    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :inline_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: 'sr-only'

    b.use :input, class: 'form-control'
    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  # Wrappers for forms and inputs using the Bootstrap toolkit.
  # Check the Bootstrap docs (http://getbootstrap.com)
  # to learn about the different styles for forms and inputs,
  # buttons and other elements.
  config.default_wrapper = :vertical_form
  config.wrapper_mappings = {
    check_boxes: :vertical_radio_and_checkboxes,
    radio_buttons: :vertical_radio_and_checkboxes,
    file: :vertical_file_input,
    boolean: :vertical_boolean,
  }
end

vertical_form 和 horizontal_form 我们选择一种，然后把其余的去除掉，并把设置为默认wrapper的代码也去掉。再将wrapper名称改为gem名称。

得到的结果大概是这样(config/initializers/simple_form_kc_courses.rb)：

SimpleForm.setup do |config|
  config.error_notification_class = 'alert alert-danger'
  config.button_class = 'btn btn-default'
  config.boolean_label_class = nil

  config.wrappers :kc_courses, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input, class: 'form-control'
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :readonly
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly

    b.wrapper tag: 'div', class: 'col-sm-offset-3 col-sm-9' do |wr|
      wr.wrapper tag: 'div', class: 'checkbox' do |ba|
        ba.use :label_input, class: 'col-sm-9'
      end

      wr.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      wr.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.optional :readonly

    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end
end

然后在 engine 里使用到 simple_form 的地方，添加上wrapper，例如：

= simple_form_for @course, wrapper: :kc_courses do |f|
  .form-inputs
    = f.input :title
    = f.input :desc, as: :text

  .form-actions
    = f.button :submit

%a{href: (courses_path)} 返回

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Rails-Engine-simple_form配置规范

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