分类: 首先是不为空validates :name,presence:{message:'blank is not allowed'} 唯一性:validates :name,uniqueness:{message:'already exist!',case_sensitive: false}#case_sensitive区分大小写 长度:validates :name,length:{in: 6..20,message:'must in 6-20 byte'} 格式:validates :name,format:{with: /[a-z]/,message:'must contain at least one lower case character'} 范围:validates :country,inclusion:{in:['China','USA','Jpan','Mexico'],message:'must one of China USA Jpan Mexico '} validates_inclusion_of :done_ratio, :in => 0..100 数字:validates :graduate,numericality:{allow_nil: true,greater_than: 1920,less_than_or_equal_to:Time.now.year}
validates :description,presence:true,if: :require_description_presence? def require_description_presence? self.can_send_mail end 这个validates :description,presence: true只有在require_description_presence?方法返回true的时候才会起作用
validate :description_length_words def description_length_words unless self.description.blank? then num_words = self.description.split.length if num_words < 5 then self.errors.add(:description,'must be at least 5 words long') elsif num_words > 50 self.errors.add(:description,'must be at most 50 words long') end end end
validates_exclusion_of 是和validates_inclusion_of相反的! |
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来自: ala咪s > 《ruby&rails》