Ruby on rails 条件回形针存在性验证
如果存在其他字段,如何验证回形针附件不存在?我试过:Ruby on rails 条件回形针存在性验证,ruby-on-rails,validation,activerecord,paperclip,paperclip-validation,Ruby On Rails,Validation,Activerecord,Paperclip,Paperclip Validation,如果存在其他字段,如何验证回形针附件不存在?我试过: validates_attachment :img, presence: false, if: :some_other_field? def some_other_field? some_other_field end 试试这个:- validates_attachment :img, presence: true, if: :some_other_field? def some_other_field? some_other_fi
validates_attachment :img, presence: false, if: :some_other_field?
def some_other_field?
some_other_field
end
试试这个:-
validates_attachment :img, presence: true, if: :some_other_field?
def some_other_field?
some_other_field.present?
end
您是否尝试过使用
存在?
而不是存在?
,可能有效
validates_attachment :img, presence: false, if: :some_other_field?
def some_other_field?
some_other_field.exists?
end
类似的问题,我的解决方案是在def中进行比较
validate :check_image_with_title
def check_image_with_title
if !ctitle.blank? and cimage.blank?
#If ctitle IS NOT empty and cimage IS empty, add a custom error message
errors.add :key, "You need an image to go with your title"
return false
else
return true
end
end
就像TechVinet的方法和Aman的方法一样,我试过了。没有骰子。这是我决定的,但我仍然在寻找一种更优雅的方式:
验证:img\u文件名,缺勤:true,if::some\u other\u字段?