Rails - Jan 2008 - Use of validates_uniqueness_of for create but not for edit

Hello People,

I wanted to validate my form for duplicate entries while creating a new
user .  So I  added  validates_uniqueness_of in the users model. But it
gets applied to the edit user code also.

Since its an edit-user page, it should not validate duplicate records
and should update the existing record.Or say , is should have
validations of it own

I tried adding a validation function check_duplicate in the model  and
called it before_create . But that gives errors.



Can anyone please help me for this.

Thanks n Regards
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validates_uniqueness_of should validate on create and update, to achieve 
some degree of uniqueness. Assuming your data is unique, am surprised 
that your model is complaining.

Yukti Vig wrote:
> Hello People,
> 
> I wanted to validate my form for duplicate entries while creating a new
> user .  So I  added  validates_uniqueness_of in the users model. But it
> gets applied to the edit user code also.
> 
> Since its an edit-user page, it should not validate duplicate records
> and should update the existing record.Or say , is should have
> validations of it own
> 
> I tried adding a validation function check_duplicate in the model  and
> called it before_create . But that gives errors.
> 
> 
> 
> Can anyone please help me for this.
> 
> Thanks n Regards
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Thanks Bl Jj for putting your time.

  before_create :check_duplicate

  def check_duplicate
    validates_uniqueness_of   :login,:scope =>[:email], :case_sensitive 
=> false
  end


This is what I added to my model. Amd the error I get is

undefined method `validates_uniqueness_of'' for #<User:0x3752c24>


Is there any issue with the "check_duplicate" not getting values of 
login and email.


regards.







Bl Jj wrote:
> validates_uniqueness_of should validate on create and update, to achieve 
> some degree of uniqueness. Assuming your data is unique, am surprised 
> that your model is complaining.
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On Jan 29, 2008 1:54 AM, Yukti Vig
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
>
>  before_create :check_duplicate
>
>  def check_duplicate
>    validates_uniqueness_of   :login,:scope =>[:email], :case_sensitive
> => false
>  end
>
> This is what I added to my model. Amd the error I get is
>
> undefined method `validates_uniqueness_of'' for
#<User:0x3752c24>
>
> Is there any issue with the "check_duplicate" not getting values
of
> login and email.

I don''t know if you can use the validates_* methods in callbacks, so I
don''t
know whether it makes sense for you to have received that error.

My first instinct would be to try something like

validates_uniqueness_of :login, :on => :create, ...

The TextMate snippet for validates_uniqueness_of adds an :on option, but the
Rails API docs don''t list one. I don''t have time to actually
try it all out
here, but maybe you can use the :on option to indicate that the check should
be made only on :create.

Regards,
Craig

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That works !! Craig :))

Thanks allot!!!

regards
Yukti.Vig



Craig Demyanovich wrote:
> I don''t know if you can use the validates_* methods in callbacks,
so I
> don''t
> know whether it makes sense for you to have received that error.
> 
> My first instinct would be to try something like
> 
> validates_uniqueness_of :login, :on => :create, ...
> 
> The TextMate snippet for validates_uniqueness_of adds an :on option, but 
> the
> Rails API docs don''t list one. I don''t have time to
actually try it all
> out
> here, but maybe you can use the :on option to indicate that the check 
> should
> be made only on :create.

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Hi,

The reason you''re getting this error is because the
"validates"
functions are class level methods, whereas your check_duplicate function 
is an instance method. So, to fix this, just reference the
"validates_"
methods with the appropriate model name:

def check_duplicate
  User.validates_uniqueness_of :login,:scope =>[:email], :case_sensitive
end


Craig Demyanovich wrote:
> On Jan 29, 2008 1:54 AM, Yukti Vig
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
> 
>> undefined method `validates_uniqueness_of'' for
#<User:0x3752c24>
>>
>> Is there any issue with the "check_duplicate" not getting
values of
>> login and email.
> 
> 
> I don''t know if you can use the validates_* methods in callbacks,
so I
> don''t
> know whether it makes sense for you to have received that error.
> 
> My first instinct would be to try something like
> 
> validates_uniqueness_of :login, :on => :create, ...
> 
> The TextMate snippet for validates_uniqueness_of adds an :on option, but 
> the
> Rails API docs don''t list one. I don''t have time to
actually try it all
> out
> here, but maybe you can use the :on option to indicate that the check 
> should
> be made only on :create.
> 
> Regards,
> Craig
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