Ruby-on-rails 验证非负整数和十进制值
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Validation for non-negative integers and decimal values
提问by Sneha Kachroo
My fields are:
tax rateand tax amountin which I want to validate positive values.
我的字段是：
tax rate并且tax amount我想在其中验证正值。
I wrote this validation:
我写了这个验证：
:format => { :with => /\A[+]?\d+\Z/}
But it is not taking numbers with a decimal point like 4.67.
And it's throwing me an error.
What type of validation will work on integers and floating point values?
for example: 2, 57, 54.56should pass but -2.56, -87should fail.
但它不会采用像4.67. 它给我一个错误。什么类型的验证适用于整数和浮点值？例如：2, 57,54.56应该通过但是-2.56,-87应该失败。
回答by dimuch
Doesn't this work?
这不行吗？
validates :your_field, :numericality => { :greater_than_or_equal_to => 0 }
(guess for taxes following rule will be more correct:)
（按照规则猜测税收会更正确：）
validates :your_field, :numericality => { :greater_than_or_equal_to => 0, :less_than_or_equal_to => 100 }
回答by Oswaldo Ferreira
You could use:
你可以使用：
validates :tax_rate, inclusion: { in: 0..5 }
It allows values like: 0, 2, 1.2, 3.2
它允许如下值：0, 2, 1.2, 3.2
Hope it helps!
希望能帮助到你！
回答by Justin
you could use validates_numericality_of :amount, :greater_than => 0.0
你可以用 validates_numericality_of :amount, :greater_than => 0.0
