Here is my model looks like:- Model: Movie has_many :songs Model: Song belongs_to :movie I have a songs/new form which contains song name and movie name input field. If movie name does not exist it should create a new one else it should use already existing one. So this I will come to know only after user enter in movie name field. Can I achieve this using nested attributes of rails 3? Note: I can able to implement the same in has_many association but not in this case. Thanks! Butu -- 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.
Butu, You should look at before_create in ActiveRecord. I think it would be better if you put on in your Song Model that calls private function to check whether the passed in Movie name exists or not. If it doesn''t, create it and if it does exist do nothing. Thanks, B. On Mon, Feb 21, 2011 at 9:42 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Here is my model looks like:- > Model: Movie > has_many :songs > Model: Song > belongs_to :movie > I have a songs/new form which contains song name and movie name input field. > If movie name does not exist it should create a new one else it should use > already existing one. So this I will come to know only after user enter in > movie name field. > Can I achieve this using nested attributes of rails 3? > Note: I can able to implement the same in has_many association but not in > this case. > Thanks! > Butu > > -- > 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. >-- 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.
Thanks Bryan for your reply. For first part of my problem, I am able to figure out the nested attributes with belongs_to. For second part, I am looking for Rails way solution to my problem. Using nested attribute. I can able to create Movie if it does not exist. And able to associate it with song model (movie_id populated correctly) work really good by rails way. I want this behavior. *But when movie already exist. I want to associate that movie id with the new song to be created using accepts_nested_attributes_for.* * * Thanks! Butu On Tue, Feb 22, 2011 at 10:09 PM, Bryan Crossland <bacrossland-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote:> Butu, > > You should look at before_create in ActiveRecord. I think it would be > better if you put on in your Song Model that calls private function to > check whether the passed in Movie name exists or not. If it doesn''t, > create it and if it does exist do nothing. > > Thanks, > > B. > > On Mon, Feb 21, 2011 at 9:42 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > Here is my model looks like:- > > Model: Movie > > has_many :songs > > Model: Song > > belongs_to :movie > > I have a songs/new form which contains song name and movie name input > field. > > If movie name does not exist it should create a new one else it should > use > > already existing one. So this I will come to know only after user enter > in > > movie name field. > > Can I achieve this using nested attributes of rails 3? > > Note: I can able to implement the same in has_many association but not in > > this case. > > Thanks! > > Butu > > > > -- > > 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. > > >-- 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 Wed, Feb 23, 2011 at 2:54 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Thanks Bryan for your reply. > > For first part of my problem, I am able to figure out the nested attributes > with belongs_to. > > For second part, I am looking for Rails way solution to my problem. > > Using nested attribute. I can able to create Movie if it does not exist. > And able to associate it with song model (movie_id populated correctly) > work really good by rails way. I want this behavior. > > *But when movie already exist. I want to associate that movie id with the > new song to be created using accepts_nested_attributes_for.* > * > * >you can''t. accepts_nested_attributes_for doesn''t work on belongs_to attribute.> ** > Thanks! > Butu > > On Tue, Feb 22, 2011 at 10:09 PM, Bryan Crossland <bacrossland-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote: > >> Butu, >> >> You should look at before_create in ActiveRecord. I think it would be >> better if you put on in your Song Model that calls private function to >> check whether the passed in Movie name exists or not. If it doesn''t, >> create it and if it does exist do nothing. >> >> Thanks, >> >> B. >> >> On Mon, Feb 21, 2011 at 9:42 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: >> > Here is my model looks like:- >> > Model: Movie >> > has_many :songs >> > Model: Song >> > belongs_to :movie >> > I have a songs/new form which contains song name and movie name input >> field. >> > If movie name does not exist it should create a new one else it should >> use >> > already existing one. So this I will come to know only after user enter >> in >> > movie name field. >> > Can I achieve this using nested attributes of rails 3? >> > Note: I can able to implement the same in has_many association but not >> in >> > this case. >> > Thanks! >> > Butu >> > >> > -- >> > 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. >> > >> > > -- > 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. >-- ------------------------------------------------------------- visit my blog at http://jimlabs.heroku.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.
Hello Jim, Thanks for your reply. I can able to do accepts_nested_attributes with belongs_to @song.build_movie use this either in action or before the form and use fields_for. This will create the new movie record and insert movie_id in song model as well. On Wed, Feb 23, 2011 at 2:12 PM, Jim Ruther Nill <jvnill-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > On Wed, Feb 23, 2011 at 2:54 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > >> Thanks Bryan for your reply. >> >> For first part of my problem, I am able to figure out the nested >> attributes with belongs_to. >> >> For second part, I am looking for Rails way solution to my problem. >> >> Using nested attribute. I can able to create Movie if it does not exist. >> And able to associate it with song model (movie_id populated correctly) >> work really good by rails way. I want this behavior. >> >> *But when movie already exist. I want to associate that movie id with the >> new song to be created using accepts_nested_attributes_for.* >> * >> * >> > > you can''t. accepts_nested_attributes_for doesn''t work on belongs_to > attribute. > > >> ** >> Thanks! >> Butu >> >> On Tue, Feb 22, 2011 at 10:09 PM, Bryan Crossland <bacrossland-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote: >> >>> Butu, >>> >>> You should look at before_create in ActiveRecord. I think it would be >>> better if you put on in your Song Model that calls private function to >>> check whether the passed in Movie name exists or not. If it doesn''t, >>> create it and if it does exist do nothing. >>> >>> Thanks, >>> >>> B. >>> >>> On Mon, Feb 21, 2011 at 9:42 PM, Butu <butu25-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: >>> > Here is my model looks like:- >>> > Model: Movie >>> > has_many :songs >>> > Model: Song >>> > belongs_to :movie >>> > I have a songs/new form which contains song name and movie name input >>> field. >>> > If movie name does not exist it should create a new one else it should >>> use >>> > already existing one. So this I will come to know only after user enter >>> in >>> > movie name field. >>> > Can I achieve this using nested attributes of rails 3? >>> > Note: I can able to implement the same in has_many association but not >>> in >>> > this case. >>> > Thanks! >>> > Butu >>> > >>> > -- >>> > 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org >>> > For more options, visit this group at >>> > http://groups.google.com/group/rubyonrails-talk?hl=en. >>> > >>> >> >> -- >> 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. >> > > > > -- > ------------------------------------------------------------- > visit my blog at http://jimlabs.heroku.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. >-- 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.
You don''t need to use nested attributes for that. You can achieve the
same result with a pretty simple virtual attribute:
class Song < ActiveRecord::Base
belongs_to :movie
def movie_name=(name)
@movie_name = name
self.movie = Movie.find_or_initialize_by_name(name)
end
def movie_name
@movie_name
end
end
And then on your form:
= form_for @song do |form|
= form.text_field :movie_name
On Feb 23, 3:13 pm, Butu <but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hello Jim,
>
> Thanks for your reply.
>
> I can able to do accepts_nested_attributes with belongs_to
>
> @song.build_movie
>
> use this either in action or before the form and use fields_for. This will
> create the new movie record and insert movie_id in song model as well.
>
> On Wed, Feb 23, 2011 at 2:12 PM, Jim Ruther Nill
<jvn...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
>
>
>
>
> > On Wed, Feb 23, 2011 at 2:54 PM, Butu
<but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> >> Thanks Bryan for your reply.
>
> >> For first part of my problem, I am able to figure out the nested
> >> attributes with belongs_to.
>
> >> For second part, I am looking for Rails way solution to my
problem.
>
> >> Using nested attribute. I can able to create Movie if it does not
exist.
> >> And able to associate it with song model (movie_id populated
correctly)
> >> work really good by rails way. I want this behavior.
>
> >> *But when movie already exist. I want to associate that movie id
with the
> >> new song to be created using accepts_nested_attributes_for.*
> >> *
> >> *
>
> > you can''t. accepts_nested_attributes_for doesn''t
work on belongs_to
> > attribute.
>
> >> **
> >> Thanks!
> >> Butu
>
> >> On Tue, Feb 22, 2011 at 10:09 PM, Bryan Crossland
<bacrossl...@gmail.com>wrote:
>
> >>> Butu,
>
> >>> You should look at before_create in ActiveRecord. I think it
would be
> >>> better if you put on in your Song Model that calls private
function to
> >>> check whether the passed in Movie name exists or not. If it
doesn''t,
> >>> create it and if it does exist do nothing.
>
> >>> Thanks,
>
> >>> B.
>
> >>> On Mon, Feb 21, 2011 at 9:42 PM, Butu
<but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>> > Here is my model looks like:-
> >>> > Model: Movie
> >>> > has_many :songs
> >>> > Model: Song
> >>> > belongs_to :movie
> >>> > I have a songs/new form which contains song name and
movie name input
> >>> field.
> >>> > If movie name does not exist it should create a new one
else it should
> >>> use
> >>> > already existing one. So this I will come to know only
after user enter
> >>> in
> >>> > movie name field.
> >>> > Can I achieve this using nested attributes of rails 3?
> >>> > Note: I can able to implement the same in has_many
association but not
> >>> in
> >>> > this case.
> >>> > Thanks!
> >>> > Butu
>
> >>> > --
> >>> > 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@googlegroups.com
> >>> .
> >>> > 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.
>
> >> --
> >> 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
> >> For more options, visit this group at
> >>http://groups.google.com/group/rubyonrails-talk?hl=en.
>
> > --
> > -------------------------------------------------------------
> > visit my blog athttp://jimlabs.heroku.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.
--
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Reu, thanks a lot!! this is exactly what I want. Facing one problem when I am using accepts_nested_attributes_for and has_many. This is working in rails way and able to insert record into songs, people and people_song table correctly. But again I want to use similar logic find and initilize. But in that case I may need to insert into people_song table manually. Any thoughts on this? Thanks! Butu On Thu, Feb 24, 2011 at 8:34 AM, reu <rnavarro1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> You don''t need to use nested attributes for that. You can achieve the > same result with a pretty simple virtual attribute: > > class Song < ActiveRecord::Base > belongs_to :movie > > def movie_name=(name) > @movie_name = name > self.movie = Movie.find_or_initialize_by_name(name) > end > > def movie_name > @movie_name > end > end > > And then on your form: > > = form_for @song do |form| > = form.text_field :movie_name > > On Feb 23, 3:13 pm, Butu <but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > Hello Jim, > > > > Thanks for your reply. > > > > I can able to do accepts_nested_attributes with belongs_to > > > > @song.build_movie > > > > use this either in action or before the form and use fields_for. This > will > > create the new movie record and insert movie_id in song model as well. > > > > On Wed, Feb 23, 2011 at 2:12 PM, Jim Ruther Nill <jvn...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > wrote: > > > > > > > > > > > > > > > > > > > > > On Wed, Feb 23, 2011 at 2:54 PM, Butu <but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > > >> Thanks Bryan for your reply. > > > > >> For first part of my problem, I am able to figure out the nested > > >> attributes with belongs_to. > > > > >> For second part, I am looking for Rails way solution to my problem. > > > > >> Using nested attribute. I can able to create Movie if it does not > exist. > > >> And able to associate it with song model (movie_id populated > correctly) > > >> work really good by rails way. I want this behavior. > > > > >> *But when movie already exist. I want to associate that movie id with > the > > >> new song to be created using accepts_nested_attributes_for.* > > >> * > > >> * > > > > > you can''t. accepts_nested_attributes_for doesn''t work on belongs_to > > > attribute. > > > > >> ** > > >> Thanks! > > >> Butu > > > > >> On Tue, Feb 22, 2011 at 10:09 PM, Bryan Crossland < > bacrossl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote: > > > > >>> Butu, > > > > >>> You should look at before_create in ActiveRecord. I think it would be > > >>> better if you put on in your Song Model that calls private function > to > > >>> check whether the passed in Movie name exists or not. If it doesn''t, > > >>> create it and if it does exist do nothing. > > > > >>> Thanks, > > > > >>> B. > > > > >>> On Mon, Feb 21, 2011 at 9:42 PM, Butu <but...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > >>> > Here is my model looks like:- > > >>> > Model: Movie > > >>> > has_many :songs > > >>> > Model: Song > > >>> > belongs_to :movie > > >>> > I have a songs/new form which contains song name and movie name > input > > >>> field. > > >>> > If movie name does not exist it should create a new one else it > should > > >>> use > > >>> > already existing one. So this I will come to know only after user > enter > > >>> in > > >>> > movie name field. > > >>> > Can I achieve this using nested attributes of rails 3? > > >>> > Note: I can able to implement the same in has_many association but > not > > >>> in > > >>> > this case. > > >>> > Thanks! > > >>> > Butu > > > > >>> > -- > > >>> > 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > > >>> > For more options, visit this group at > > >>> >http://groups.google.com/group/rubyonrails-talk?hl=en. > > > > >> -- > > >> 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. > > > > > -- > > > ------------------------------------------------------------- > > > visit my blog athttp://jimlabs.heroku.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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > > > For more options, visit this group at > > >http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- > 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. > >-- 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.