Validation :if option with Class vars

Rails
1

I have some validations that need to include an :if clause using the
Class and not the model.

Sounds reasonably straight forward at first by doing this:

validates_presence_of :field_one, :field_two, :if =>
Proc.new{|MyClass| MyClass.feature_is_enabled}

And that works. The problem occurs when I do mor ethan one validation
that way.

validates_presence_of :field_one, :field_two, :if =>
Proc.new{|MyClass| MyClass.feature_is_enabled}
validates_numericality_of :field_three, :field_four, :if =>
Proc.new{|MyClass| MyClass.feature_is_enabled}

That generates a “constant already defined” error. I suspect it has to
be complaining about the |MyClass| part, but I can’t think of what else
to do there.

Any ideas? Thx.

– gw

2

just modify the condition as follows:

:if => Proc.new{|my_class| MyClass.feature_is_enabled}
(or)
:if =>Proc.new{|whatever| MyClass.feature_is_enabled}

The problem is you used MyClass as constant instead of variable. Just
using the lowercase letter will solve ur problem.

–
Regards,

T.Veerasundaravel.
http://tinyurl.com/25vma7h
@veerasundaravel

3

Veera S. wrote:

just modify the condition as follows:

:if => Proc.new{|my_class| MyClass.feature_is_enabled}
(or)
:if =>Proc.new{|whatever| MyClass.feature_is_enabled}

The problem is you used MyClass as constant instead of variable. Just
using the lowercase letter will solve ur problem.

Duh, that makes sense. I was stuck on needing to pass the class name in,
which even if that were the case, this isn’t how to do it anyway. Brain
spasm.

Thx.