加入 content_tag 个块（表单生成器）

Question

我收到一些错误并且不确定如何加入 content_tags 的块。

bs_form_builder.rb:36: syntax error, unexpected tSYMBEG, expecting end @template.content_tag :div, class: "input-group" do

bs_form_builder.rb:36: syntax error, unexpected do, expecting end ...g :div, class: "input-group" do ... ^~

bs_form_builder.rb:39: syntax error, unexpected '+', expecting end end + ^

bs_form_builder.rb:43: syntax error, unexpected end, expecting end-of-input end ^~~

class BsFormBuilder < ActionView::Helpers::FormBuilder

def bs_dollar_input(method, label)
    @template.content_tag :div, class: "form-group" do
      @template.label(@object_name, label)+
      @template.content_tag :div, class: "input-group" do
        @template.content_tag :div, class: "input-group-prepend" do
          @template.content_tag(:span, "$", class:'input-group-text')
        end +
        @template.text_field(@object_name, method, class: 'form-control')
      end
    end 
  end
 end

预期结果：

  <div class="form-group">
      <label>What is the value of your favorite car?</label>
      <div class="input-group">
          <div class="input-group-prepend">
              <span class="input-group-text">$</span>
          </div>
          <input class="form-control" id="car" name="car" required="" type="text" value="0" />
      </div>
  </div>

Answer 1

需要在 content_tags 上添加 ()。

def bs_dollar_input(method, label)
    @template.content_tag :div, class: "form-group" do
      @template.label(@object_name, label)+
      @template.content_tag(:div, class: "input-group") do
        @template.content_tag( :div, class: "input-group-prepend") do
          @template.content_tag(:span, "$", class:'input-group-text')
        end +
        @template.text_field(@object_name, method, class: 'form-control')
      end
    end 
  end
 end

加入 content_tag 个块（表单生成器）

Joining Blocks of content_tag (Form Builder)

ruby-on-rails

formbuilder

ruby-on-rails-5

预期结果：