我有两个领域:
认证:bhp
有效:
现在:bhp值为80,
then value of :ps should be within a range +-10 of :bhp for eg. [70..90] in here.
反之亦然。
You can use custom validator.
与此类似:
validate :keep_ps_in_range_of_bhp
def keep_ps_in_range_of_bhp
range = 10
unless (bhp-ps).abs <= range
errors.add(:ps, "should be in range +-#{range} of bhp")
end
end
同样,你也可以为相反的情况增加验证人,但是,只有当你不允许改变这种价值时,才有意义(即使在这种情况下,我也不相信这种做法确实好)。
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