ruby-on-rails - 如何在 simple_form gem 中使用 Bootstrap 的输入组

Question

环境

ruby 2.5.1

rails 5.2.1

简单表格 4.0.1

当前行为

我遵循 http://simple-form-bootstrap.plataformatec.com.br/examples/input_group 中的示例

我从 <%= simple_form_for app, wrapper: :input_group do |f| %> 开始并获得 Couldn't find wrapper with name input_group ，所以我取消注释

config.wrappers :input_group, tag: 'div', class: 'form-group', error_class: 'form-group-invalid', valid_class: 'form-group-valid' do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :minlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: 'form-control-label'
    b.wrapper :input_group_tag, tag: 'div', class: 'input-group' do |ba|
      ba.optional :prepend
      ba.use :input, class: 'form-control', error_class: 'is-invalid', valid_class: 'is-valid'
      ba.optional :append
    end
    b.use :full_error, wrap_with: { tag: 'div', class: 'invalid-feedback d-block' }
    b.use :hint, wrap_with: { tag: 'small', class: 'form-text text-muted' }
  end

在 simple_form_bootstrap.rb
并获得 undefined method附加'类 SimpleForm::Inputs::StringInput'反而。

这个问题<%= f.input :subdomain, append: "example.com" %>
我该如何使用它，它甚至支持 simple_form 吗？不知道他们为什么注释掉那块代码。

Answer 1

创建 config/initializers/simple_form_component.rb

module InputGroup
  def prepend(wrapper_options = nil)
    span_tag = content_tag(:span, options[:prepend], class: "input-group-text")
    template.content_tag(:div, span_tag, class: "input-group-prepend")
  end

  def append(wrapper_options = nil)
    span_tag = content_tag(:span, options[:append], class: "input-group-text")
    template.content_tag(:div, span_tag, class: "input-group-append")
  end
end

# Register the component in Simple Form.
SimpleForm.include_component(InputGroup)

Source