Hi, I have a web-based form for applicants to enter their details, created using form_for :applicant There is one field in the corresponding applicants table of my database which is not represented in the form. I want to set the value of this field in the model (it should be an unique hash). What is the best way to do this? Currently I am doing: validate do |applicant| applicant.check_things applicant.non_represented_field = 123456789 end This works, but the value assigned to the ''non-represented'' field is only available after the applicants details have been successfully saved. If validation fails (i.e. if an obligatory field was omitted), this value is showing up in the hash of values that is posted to the controller as nil (which is bad as I always want it to be set). I would be grateful if anyone could give me an idea how to solve this. The only other thing I could think of was setting it with some kind of call back, but I couldn''t get that to work. Thanks in advance. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
save it in the session hash on validation and delete it from the session
hash after the save.
if validations fails, try to find the value on the session and putting it in
the controller. Since validation will trigger again
in a second submit, also look for the value in the session hash before
setting a new one.
validate do |applicant|
applicant.check_things
if session[:mysterous_object].nil?
applicant.non_represented_field = session[:mysterous_object] 123456789
else
applicant.non_represented_field = session[:mysterous_object]
end
end
then on an after save
session[:mysterous_object] = nil
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Radhames Brito wrote:> save it in the session hash on validationHi, Thanks for the reply. Did I understand you correctly, that you are suggesting setting a session variable in the model (where my validation is taking place) which I can then pass to the controller? I didn''t know that that was possible. Any hacks around this seem to be regarded as bad practice: http://www.ruby-forum.com/topic/160769 If I have misunderstood you please let me know. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
How about this ?
validate do |applicant|
errors.add_to_base("Things must check out!") unless
applicant.check_things
end
def before_save
applicant.non_represented_field = 123456789
end
before_save will only be called if your validations pass, so
non_represented_field will only be assigned to valid records.
Luke
On 2010-10-05, at 1:46 PM, Jim Burgess wrote:
> Hi,
>
> I have a web-based form for applicants to enter their details, created
> using form_for :applicant
>
> There is one field in the corresponding applicants table of my database
> which is not represented in the form.
>
> I want to set the value of this field in the model (it should be an
> unique hash).
>
> What is the best way to do this?
>
> Currently I am doing:
>
> validate do |applicant|
> applicant.check_things
> applicant.non_represented_field = 123456789
> end
>
> This works, but the value assigned to the
''non-represented'' field is
> only available after the applicants details have been successfully
> saved.
>
> If validation fails (i.e. if an obligatory field was omitted), this
> value is showing up in the hash of values that is posted to the
> controller as nil (which is bad as I always want it to be set).
>
> I would be grateful if anyone could give me an idea how to solve this.
> The only other thing I could think of was setting it with some kind of
> call back, but I couldn''t get that to work.
>
> Thanks in advance.
> --
> Posted via http://www.ruby-forum.com/.
>
> --
> You received this message because you are subscribed to the Google Groups
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http://groups.google.com/group/rubyonrails-talk?hl=en.
>
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> validate do |applicant| > errors.add_to_base("Things must check out!") unless > applicant.check_things > end > > def before_save > applicant.non_represented_field = 123456789 > end > > before_save will only be called if your validations pass, so > non_represented_field will only be assigned to valid records.Hi, Thanks for the reply. Sorry, I don''t think I expressed myself very well. When I submit the form, every value the applicant has entered is validated and passed to the controller. That means that if they enter a value in the email field (for example) I can access this value in the controller in the params hash, regardless of whether validation failed or passed. As this ''non-represented'' field is only getting set after a successful validation, it is not available in the params hash until everything has been filled out correctly. Before that it always shows as nil. I would like to set this value in my model with every form submission (it is a hash which is always a different value per submission) so that it is always available in the params has in the controller. I really appreciate any help. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 2010-10-05, at 10:41 PM, Jim Burgess wrote:> >> validate do |applicant| >> errors.add_to_base("Things must check out!") unless >> applicant.check_things >> end >> >> def before_save >> applicant.non_represented_field = 123456789 >> end >> >> before_save will only be called if your validations pass, so >> non_represented_field will only be assigned to valid records. > > Hi, > > Thanks for the reply. > > Sorry, I don''t think I expressed myself very well. > > When I submit the form, every value the applicant has entered is > validated and passed to the controller. That means that if they enter a > value in the email field (for example) I can access this value in the > controller in the params hash, regardless of whether validation failed > or passed. > > As this ''non-represented'' field is only getting set after a successful > validation, it is not available in the params hash until everything has > been filled out correctly. Before that it always shows as nil. > > I would like to set this value in my model with every form submission > (it is a hash which is always a different value per submission) so that > it is always available in the params has in the controller. > > I really appreciate any help. >Perhaps you could post the pertinent code ? Do you have validation checks in the form (via javascript) or just the ones in model ? blah = Blah.new(params[:blah]) #now you have a instance of Blah. if blah.save #now you have access to the non represented field blah.non_represented_field end Another approach might be to pass this value from the new action to the create action through the form using a hidden field. Luke -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Hi Luke, Thanks very much for the reply. You pointed me in exactly the right direction to solve my problem!!> Another approach might be to pass this value from the new action to the > create action through the form using a hidden field.I tried this already. This had the disadvantage that the hidden field was never up-to-date as it was set during validation and thus always contained the value of the previous submission.> blah = Blah.new(params[:blah]) > > #now you have a instance of Blah. > > if blah.save > #now you have access to the non represented field > blah.non_represented_field > endThis on the other hand, sorted me right out. I changed it slightly to: applicant = Applicant.new(params[:applicant]) if applicant.valid? #now I have access to the field I need do_stuff_with_non_represented_field applicant.save end What I was actually using this field for was to create a hash of all submitted values, compare it to the hash of the previous record and thus prevent double data submission. And it works wonderfully. Thanks very much for your help. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On Tue, Oct 5, 2010 at 5:43 PM, Jim Burgess <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Radhames Brito wrote: > > save it in the session hash on validation > > Hi, > > Thanks for the reply. > Did I understand you correctly, that you are suggesting setting a > session variable in the model (where my validation is taking place) > which I can then pass to the controller? > > I didn''t know that that was possible. > Any hacks around this seem to be regarded as bad practice: > http://www.ruby-forum.com/topic/160769 > > If I have misunderstood you please let me know. > >are you use to using the flash? like flash[:notice]? well the session[:] object is just like it, it exits across request and it exist in the context of th user, that is, each user has its on session object. The difference is that what you store in the flash is deleted after one request but what you store in session is there untill the session is reset or you delete the object. Is often used in ecomerce app to store the cart like this session[:cart], and you can store anything in it. In fact storing options can be set to make it store in the DB. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 6 October 2010 22:07, radhames brito <rbritom-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > On Tue, Oct 5, 2010 at 5:43 PM, Jim Burgess <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote: >> >> Radhames Brito wrote: >> > save it in the session hash on validation >> >> Hi, >> >> Thanks for the reply. >> Did I understand you correctly, that you are suggesting setting a >> session variable in the model (where my validation is taking place) >> which I can then pass to the controller? >> >> I didn''t know that that was possible. >> Any hacks around this seem to be regarded as bad practice: >> http://www.ruby-forum.com/topic/160769 >> >> If I have misunderstood you please let me know. >> > > are you use to using the flash? like flash[:notice]? well the session[:] > object is just like it, it exits across request and it exist in the context > of th user, that is, each user has its on session object. The difference is > that what you store in the flash is deleted after one request but what you > store in session is there untill the session is reset or you delete the > object. Is often used in ecomerce app to store the cart like this > session[:cart], and you can store anything in it. In fact storing options > can be set to make it store in the DB.I think Jim is querying whether one can access the session variable from within the model, and even if one can, whether one should. Colin -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
> I think Jim is querying whether one can access the session variable > from within the model, and even if one can, whether one should. > >Oh i see, well i will test if is available in the model and if possible ill see if there a problem with it. -- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.