Ruby on Rails - 验证成本

Question

验证用户的成本/价格输入的最佳方法是什么,验证规则如下:

• 格式示例允许.23,.2,1.23,0.25,5,6.3(小数点后最多两位数)
• 最小值0.01
• 最大值9.99

Answer 1

检查价格并验证格式

#rails 3    
validates :price, :format => { :with => /\A\d+(?:\.\d{0,2})?\z/ }, :numericality => {:greater_than => 0, :less_than => 10}

#rails 2
validates_numericality_of :price, :greater_than => 0, :less_than => 10    
validates_format_of :price, :with => /\A\d+(?:\.\d{0,2})?\z/