Show object column using association in simple_form

2020.05.02

Rails

You can show specific column name in association check_boxes in simple form.
Like this.

= f.association :prefectures, as: :check_boxes,
      label_method: lambda { |prefecture|  JpPrefecture::Prefecture.find(prefecture.prefecture_code).name}

1 2	= f.association :prefectures, as: :check_boxes, label_method: lambda { \|prefecture\| JpPrefecture::Prefecture.find(prefecture.prefecture_code).name}