Best way to validate an integer field?

Rails
1

I am trying to validate an integer field called quantity. I don’t know
how to chack if it has gone beyond or below the maximum or minimum value
allowed by the Firebird RDBMS. I tired adding this code to the validate
method in the model:

if (quantity > -2147483648) and (quantity < 2147483648)

    errors.add("quantity", "is out of range (must be between

-2147483648 and 2147483648)")

end

But when I try entering a big value for example a bunch of numbers in
the form field I get this sql error when I hit edit:

FireRuby::FireRubyException: Error preparing a SQL statement.
Dynamic SQL Error
SQL error code = -104
Token unknown - line 1, char 239
9
Invalid token
SQL Code = -104
Firebird Code = 335544569
: UPDATE parts SET “ORDERED_DATE” = CAST(‘2006-05-24 21:45:00’ AS
TIMESTAMP), “ORDER_ID” = 13, “END_DATE” = NULL, “PROVIDER_ID” = 2,
“CODE” = 'jojo ', “GOAL_DATE” = CAST(‘2006-05-28
21:45:00’ AS TIMESTAMP), “QUANTITY” =
99999999999999999999999999999999999999999999888888888888888888888888888888886666666666666666666666
WHERE id = 2

Any suggestions on the best way to validate an integer field?

Best regards.

2

On 5/25/06, Juan T. [email protected] wrote:

end

That logic looks backwards.

unless (quantity > -2147483648 && quantity < 2147483648)
…
end

3

In your model class:

validates_inclusion_of :quantity, :in => -2147483648…2147483648

Cheers!

-DF