How to know which validation failed in the model validations

Hi,

I have a Users model that has a bunch of verifications such as email
being unique and password being present etc… In my controller I want
to do @user.save and in case this failed due to the email not being
unique (The user being created is already present in the db), I want
to send an appropriate notice and redirect to a certain page. Save
only returns false when a certain validation fails, but I need to be
able to tell through code which validation it failed. I was expecting
it to throw certain types of exceptions based on what basic validation
failed but this is not how it behaves. Any ideas?

Thanks
Samir

On 21 November 2011 05:28, Samir [email protected] wrote:

In my controller I want
to do @user.save and in case this failed due to the email not being
unique (The user being created is already present in the db), I want
to send an appropriate notice and redirect to a certain page. Save
only returns false when a certain validation fails, but I need to be
able to tell through code which validation it failed. I was expecting
it to throw certain types of exceptions based on what basic validation
failed but this is not how it behaves. Any ideas?

Have a look at the docs for ActiveRecord::Errors. If you call “.save!”
it will raise an exception (if that’s what you want), otherwise, you
can inspect the errors object on an unsuccessful save to find out what
went wrong.

http://ar.rubyonrails.org/classes/ActiveRecord/Errors.html

I have a Users model that has a bunch of verifications such as email
being unique and password being present etc… In my controller I want
to do @user.save and in case this failed due to the email not being
unique (The user being created is already present in the db),

In controller, You can get what error you get.
Like,
@user.errors
@user.errors[:name]
@user.errors.size // this will show how many errors.

Regards
sathia

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