Is there a built-in way for Rails to interpret "" in a params hash as nil? I don''t want to add empty strings to my database. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
You can test for params[:whatever].blank? which is essentially [AFAIK] nil entries in a form. RSL On 12/14/06, Taylor Strait <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > > Is there a built-in way for Rails to interpret "" in a params hash as > nil? I don''t want to add empty strings to my database. > > -- > Posted via http://www.ruby-forum.com/. > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I''m trying avoid adding "" to fields on @whatever.save -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
It already comes through the form as an empty string. Perhaps something like object.attribute = nil if params[:attribute].blank? is what you''re looking for. I personally don''t worry about whether it''s saving an empty string or a nil value and instead check for object#nil? or object#blank? [in that order] when testing an attribute''s value. It just occurred to me that this might not be the most Ruby way. Anyone else? RSL On 12/14/06, Taylor Strait <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > > I''m trying avoid adding "" to fields on @whatever.save > > -- > Posted via http://www.ruby-forum.com/. > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Taylor Strait wrote:> I''m trying avoid adding "" to fields on @whatever.saveWhat about doing it at the object level? Something like: class Foo < ActiveRecord::Base def bar=(bar) bar = nil if bar.blank? self[:bar] = bar end end Eric --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
> object.attribute = nil if params[:attribute].blank?That works on a single attribute but I''m not quite sure how to do this to a hash. Something like this? params.each do {|h, k| @object.k = nil if params[:k].blank?} -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Precisely. And the before_save callback is a great place to put that! RSL On 12/14/06, Eric Anderson <eric-ANzg6odk14w@public.gmane.org> wrote:> > > Taylor Strait wrote: > > I''m trying avoid adding "" to fields on @whatever.save > > What about doing it at the object level? Something like: > > class Foo < ActiveRecord::Base > def bar=(bar) > bar = nil if bar.blank? > self[:bar] = bar > end > end > > Eric > > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I might not do params[:each] since there are non-field-inputted params in there [like :id, etc] as well as the fact that only text-field inputs return empty strings. Checkboxes return 0 and 1, which might need to be handled as true/false instead of nil. Calling them out by name is probably a better choice. RSL On 12/14/06, Taylor Strait <rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> > > > > object.attribute = nil if params[:attribute].blank? > > That works on a single attribute but I''m not quite sure how to do this > to a hash. Something like this? > > params.each do {|h, k| @object.k = nil if params[:k].blank?} > > -- > Posted via http://www.ruby-forum.com/. > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Thanks for everyone''s help. Here an example of the function I ended up
using:
if params[:person]
params[:person].delete_if {|key, value| value.blank?}
@person = Person.new(params[:person])
See how delete_if simplifies things? I knew the Pickaxe was good for
something!
--
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