Simple validation problem

Rails
1

I can’t seem to get this rule working… I want to validate the
numericality of a number only if the number isn’t nil. if not nil,
ensure the number is > -180 and less than 180

tips pls?

2

validates_numericality_of :price

protected
def validate
errors.add(:price, “error mesage”) unless price.nil? || price >= -180 ||
price <= 180
end

Adapted from ze Rails book.
Should work,
Vish

3

Vishnu G. wrote:

validates_numericality_of :price

protected
def validate
errors.add(:price, “error mesage”) unless price.nil? || price >= -180 ||
price <= 180
end

Adapted from ze Rails book.
Should work,
Vish

I think you should put if instead of unless.

Mike Mars

4

errors.add(:price, “error mesage”) unless price.nil? || price >= -180 &&
price
<= 180

The test won’t happen if price.nil? which is logical.
validates_existence_of
could take into account that condition as well.

Vish

5

Vishnu G. wrote:

errors.add(:price, “error mesage”) unless price.nil? || price >= -180 &&
price
<= 180

The test won’t happen if price.nil? which is logical.
validates_existence_of
could take into account that condition as well.

Vish

Also try if price.nil?.false?

Mike

6

mike mars wrote:

Vishnu G. wrote:

errors.add(:price, “error mesage”) unless price.nil? || price >= -180 &&
price
<= 180

The test won’t happen if price.nil? which is logical.
validates_existence_of
could take into account that condition as well.

Vish

Also try if price.nil?.false?

Mike

Or if price.notnil?

Mike