Difference between validate and validate_on_create

Testing RSpec
1

i just ran into a problem with some test, and i am not exactly sure why,
but the difference happened when i changed my model validation from:

validate :custom_validation

to:

validate_on_create :custom_validation

can someone give me any ideas on where in the chain the validation takes
place?

thanks!

2

On Thu, Apr 28, 2011 at 3:06 PM, Sergio R. [email protected]
wrote:

place?
This is really a Rails or ActiveRecord question rather than RSpec.

In any case.

validate :custom_validation
will run the custom_validation method whether the model is being
created or updated.

validate_on_create :custom_validation
will only run the custom_validation method when the method is being
created.

There’s also a validate_on_update method which will run the custom
validation method when the model is being updated but not when it is
created.

http://guides.rubyonrails.org/active_record_validations_callbacks.html#creating-custom-validation-methods

Rick DeNatale

Blog: http://talklikeaduck.denhaven2.com/
Github: rubyredrick (Rick DeNatale) · GitHub
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3

thanks, nick… i looks like i need to hunt around a bit more as to what
was causing my problem…

thanks!

4

On Thu, Apr 28, 2011 at 2:06 PM, Sergio R. [email protected]
wrote:

place?

thanks!

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validate will run that validation on create and update.
validate_on_create will only run on creation.