Rails - Dec 2010 - problem with accepts_nested_attributes_for and reject_if

I am trying to get reject_if to work using a method name instead of a
Proc. However I cannot seem to get this to work. A simplified version
of my model code is shown below. The problem is that I keep getting an
"undefined method `call'' for :not_wired?:Symbol" error. I am
using
Rails 2.3.4. Can anyone give me an idea of what might be going on
here?


class DeviceConfiguration < ActiveRecord::Base

  has_one :obd_configuration
  accepts_nested_attributes_for :obd_configuration, :reject_if
=> :not_obd?

  has_one :wired_configuration
  accepts_nested_attributes_for :wired_configuration, :reject_if
=> :not_wired?

  def not_obd?(attrs)
    !device_type.name.eql?("obd")
  end

  def not_wired?(attrs)
    !device_type.name.eql?("wired")
  end

end

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On Dec 30, 2010, at 3:17 PM, byron appelt wrote:
> I am trying to get reject_if to work using a method name instead of a
> Proc. However I cannot seem to get this to work. A simplified version
> of my model code is shown below. The problem is that I keep getting an
> "undefined method `call'' for :not_wired?:Symbol" error.
I am using
> Rails 2.3.4. Can anyone give me an idea of what might be going on
> here?
2.3.4 doesn''t allow a symbol.  Proc only.  So either upgrade or switch
over to using a Proc...

-philip

> 
> class DeviceConfiguration < ActiveRecord::Base
> 
>  has_one :obd_configuration
>  accepts_nested_attributes_for :obd_configuration, :reject_if
> => :not_obd?
> 
>  has_one :wired_configuration
>  accepts_nested_attributes_for :wired_configuration, :reject_if
> => :not_wired?
> 
>  def not_obd?(attrs)
>    !device_type.name.eql?("obd")
>  end
> 
>  def not_wired?(attrs)
>    !device_type.name.eql?("wired")
>  end
> 
> end

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Doh! Thanks, that was the problem, obviously.

On Dec 30, 6:12 pm, Philip Hallstrom <phi...-LSG90OXdqQE@public.gmane.org>
wrote:
> On Dec 30, 2010, at 3:17 PM, byron appelt wrote:
>
> > I am trying to get reject_if to work using a method name instead of a
> > Proc. However I cannot seem to get this to work. A simplified version
> > of my model code is shown below. The problem is that I keep getting an
> > "undefined method `call'' for :not_wired?:Symbol"
error. I am using
> > Rails 2.3.4. Can anyone give me an idea of what might be going on
> > here?
>
> 2.3.4 doesn''t allow a symbol.  Proc only.  So either upgrade or
switch over to using a Proc...
>
> -philip
>
>
>
>
>
>
>
>
>
> > class DeviceConfiguration < ActiveRecord::Base
>
> >  has_one :obd_configuration
> >  accepts_nested_attributes_for :obd_configuration, :reject_if
> > => :not_obd?
>
> >  has_one :wired_configuration
> >  accepts_nested_attributes_for :wired_configuration, :reject_if
> > => :not_wired?
>
> >  def not_obd?(attrs)
> >    !device_type.name.eql?("obd")
> >  end
>
> >  def not_wired?(attrs)
> >    !device_type.name.eql?("wired")
> >  end
>
> > end
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Hi, m using rails 3.0.3 and i m getting problem with reject_if .I just want
to check the condition that if all fields of educations table are blank then
reject otherwise their values should be stored in database.
but actually this saves blank also in database.

class Profile < ActiveRecord::Base

 has_many :educations, :dependent => :destroy
 accepts_nested_attributes_for :educations, :reject_if => proc { |a|
a.blank? }, :allow_destroy => true

end


i have tried this also :
 accepts_nested_attributes_for :educationss, :reject_if => lambda { |a|
a.blank? }, :allow_destroy => true

and also :
accepts_nested_attributes_for :educationss, :reject_if => lambda { |a|
a.all_blank? }, :allow_destroy => true

Can anyone give me an idea of what might be going wrong here?

Thanks
kirti

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Hi, m using rails 3.0.3 and i m getting problem with reject_if .I just
want to check the condition that if all fields of educations table are
blank then reject otherwise their values should be stored in database.
but actually this saves blank also in database.

class Profile < ActiveRecord::Base

 has_many :educations, :dependent => :destroy
 accepts_nested_attributes_for :educations, :reject_if => proc { |a|
a.blank? }, :allow_destroy => true

end


i have tried this also :
 accepts_nested_attributes_for :educations, :reject_if => lambda { |a|
a.blank? }, :allow_destroy => true

and also :
accepts_nested_attributes_for :educations, :reject_if => lambda { |a|
a.all_blank? }, :allow_destroy => true

Can anyone give me an idea of what might be going wrong here?

Thanks
kirti

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<HTML><HEAD><META content="text/html; charset=UTF-8"
http-equiv="Content-Type"></HEAD><BODY>Try
accepts_nested_attributes_for :educations, :reject_if =&gt; :all_blank,
:allow_destroy =&gt; true<BR>
<BR>
Garrett Lancaster</BODY></HTML>

<p></p>

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still its also not working...

On Mon, Jan 24, 2011 at 3:28 PM, Garrett Lancaster <
glancast-jmyiO2ngOJdad6c/EObmYVaTQe2KTcn/@public.gmane.org> wrote:
> Try accepts_nested_attributes_for :educations, :reject_if => :all_blank,
> :allow_destroy => true
>
> Garrett Lancaster
>
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Hmm...works fine for me, sounds like you have a problem somewhere else.

Here''s the doc reference: 
http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html#method-i-accepts_nested_attributes_for

I would start with the obvious, are you getting the correct values in 
the params hash?

Garrett Lancaster
> ------------------------------------------------------------------------
>
> 	kirti parihar
<mailto:pariharkirti24-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> January 24, 2011 4:12 AM
>
>
> still its also not working...
>
>
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> ------------------------------------------------------------------------
>
> 	Garrett Lancaster
<mailto:glancast-jmyiO2ngOJdad6c/EObmYVaTQe2KTcn/@public.gmane.org>
> January 24, 2011 3:58 AM
>
>
> Try accepts_nested_attributes_for :educations, :reject_if => 
> :all_blank, :allow_destroy => true
>
> Garrett Lancaster
> ------------------------------------------------------------------------
>
> 	kirti parihar
<mailto:pariharkirti24-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> January 24, 2011 1:02 AM
>
>
> Hi, m using rails 3.0.3 and i m getting problem with reject_if .I just 
> want to check the condition that if all fields of educations table are 
> blank then reject otherwise their values should be stored in database.
> but actually this saves blank also in database.
>
> class Profile < ActiveRecord::Base
>
>  has_many :educations, :dependent => :destroy
>  accepts_nested_attributes_for :educations, :reject_if => proc { |a| 
> a.blank? }, :allow_destroy => true
>
> end
>
>
> i have tried this also :
>  accepts_nested_attributes_for :educationss, :reject_if => lambda { 
> |a| a.blank? }, :allow_destroy => true
>
> and also :
> accepts_nested_attributes_for :educationss, :reject_if => lambda { |a| 
> a.all_blank? }, :allow_destroy => true
>
> Can anyone give me an idea of what might be going wrong here?
>
> Thanks
> kirti
>
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