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Sam Donaldson

2006-May-23 07:31 UTC

[Rails] ''key not found'' problem with saving model object.

Hello,

I have the following structure:

model foo
  has_many :bars:,
                  :dependent => true
end

model bar
  belongs_to :foo
end

In my action, when i try to save foo:

def save
  begin
    f = foo.new
    f.a = 5

    begin
      b = bar.new
      b.a = 10
      f.bars << b
    rescue Exception => exc
      ...
    end

    f.save!     <-- This does not happen successfully, and I end up in the
exception handler with ''key not found''
  rescue Exception => exc
    ...
  end
end

Would anybody know what''s going wrong here?  Do I need to save f first?

Thanks.
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Jonathan Viney

2006-May-23 08:01 UTC

head link

[Rails] ''key not found'' problem with saving model object.

I''m guessing you have foreign keys defined?

You won''t be able to save a Bar until it''s associated Foo has
been
saved. Also, you probably need to add the Bar to the Foo after the Foo
has been saved so that the foreign key on the Bar is set correctly.

When you are trying to save f, it tries to save the associated Bar
objects first, which will fail because their foreign key is not set.
You probably need to do something like...

ActiveRecord::Base.transaction do
  f = Foo.create(:a => 10)
  f.bars.create(:a => 10)
end

-Jonathan.

On 5/23/06, Sam Donaldson <samonderous@gmail.com>
wrote:>
> Hello,
>
> I have the following structure:
>
> model foo
>   has_many :bars:,
>                   :dependent => true
> end
>
> model bar
>   belongs_to :foo
> end
>
> In my action, when i try to save foo:
>
> def save
>   begin
>     f = foo.new
>     f.a = 5
>
>     begin
>       b = bar.new
>       b.a = 10
>       f.bars << b
>     rescue Exception => exc
>       ...
>     end
>
>     f.save!     <-- This does not happen successfully, and I end up in
the
> exception handler with ''key not found''
>   rescue Exception => exc
>     ...
>   end
> end
>
> Would anybody know what''s going wrong here?  Do I need to save f
first?
>
> Thanks.
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>

Sam Donaldson

2006-May-23 08:37 UTC

head link

[Rails] ''key not found'' problem with saving model object.

Do I have to start a transaction since we know bar can only be saved if f is
saved.  I mean, say for example f for some reason does not validate and is
therefore not saved, will bar still be saved in the table?

Thanks.


On 5/23/06, Jonathan Viney <jonathan.viney@gmail.com>
wrote:>
> I''m guessing you have foreign keys defined?
>
> You won''t be able to save a Bar until it''s associated Foo
has been
> saved. Also, you probably need to add the Bar to the Foo after the Foo
> has been saved so that the foreign key on the Bar is set correctly.
>
> When you are trying to save f, it tries to save the associated Bar
> objects first, which will fail because their foreign key is not set.
> You probably need to do something like...
>
> ActiveRecord::Base.transaction do
> f = Foo.create(:a => 10)
> f.bars.create(:a => 10)
> end
>
> -Jonathan.
>
> On 5/23/06, Sam Donaldson <samonderous@gmail.com> wrote:
> >
> > Hello,
> >
> > I have the following structure:
> >
> > model foo
> >   has_many :bars:,
> >                   :dependent => true
> > end
> >
> > model bar
> >   belongs_to :foo
> > end
> >
> > In my action, when i try to save foo:
> >
> > def save
> >   begin
> >     f = foo.new
> >     f.a = 5
> >
> >     begin
> >       b = bar.new
> >       b.a = 10
> >       f.bars << b
> >     rescue Exception => exc
> >       ...
> >     end
> >
> >     f.save!     <-- This does not happen successfully, and I end up
in
> the
> > exception handler with ''key not found''
> >   rescue Exception => exc
> >     ...
> >   end
> > end
> >
> > Would anybody know what''s going wrong here?  Do I need to
save f first?
> >
> > Thanks.
> >
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> >
> >
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
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Sam Donaldson

2006-May-23 09:03 UTC

head link

[Rails] ''key not found'' problem with saving model object.

If the intention of the transaction was to remove the f from the
Foo.createif something went wrong then it seems like it doesn''t work
because i''m able
to successfully insert a row for foo while bar errored out.

Thanks.


On 5/23/06, Sam Donaldson <samonderous@gmail.com>
wrote:>
>  Do I have to start a transaction since we know bar can only be saved if f
> is saved.  I mean, say for example f for some reason does not validate and
> is therefore not saved, will bar still be saved in the table?
>
> Thanks.
>
>
>  On 5/23/06, Jonathan Viney <jonathan.viney@gmail.com> wrote:
> >
> > I''m guessing you have foreign keys defined?
> >
> > You won''t be able to save a Bar until it''s
associated Foo has been
> > saved. Also, you probably need to add the Bar to the Foo after the Foo
> > has been saved so that the foreign key on the Bar is set correctly.
> >
> > When you are trying to save f, it tries to save the associated Bar
> > objects first, which will fail because their foreign key is not set.
> > You probably need to do something like...
> >
> > ActiveRecord::Base.transaction do
> > f = Foo.create(:a => 10)
> > f.bars.create(:a => 10)
> > end
> >
> > -Jonathan.
> >
> > On 5/23/06, Sam Donaldson <samonderous@gmail.com> wrote:
> > >
> > > Hello,
> > >
> > > I have the following structure:
> > >
> > > model foo
> > >   has_many :bars:,
> > >                   :dependent => true
> > > end
> > >
> > > model bar
> > >   belongs_to :foo
> > > end
> > >
> > > In my action, when i try to save foo:
> > >
> > > def save
> > >   begin
> > >     f = foo.new
> > >     f.a = 5
> > >
> > >     begin
> > >       b = bar.new
> > >       b.a = 10
> > >       f.bars << b
> > >     rescue Exception => exc
> > >       ...
> > >     end
> > >
> > >     f.save!     <-- This does not happen successfully, and I
end up in
> > the
> > > exception handler with ''key not found''
> > >   rescue Exception => exc
> > >     ...
> > >   end
> > > end
> > >
> > > Would anybody know what''s going wrong here?  Do I need
to save f
> > first?
> > >
> > > Thanks.
> > >
> > > _______________________________________________
> > > Rails mailing list
> > > Rails@lists.rubyonrails.org
> > > http://lists.rubyonrails.org/mailman/listinfo/rails
> > >
> > >
> > >
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
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Sam Donaldson

2006-May-23 09:27 UTC

head link

[Rails] ''key not found'' problem with saving model object.

Tried the following:

f = Foo.create(...)

This successfully creates and stores f away in the table.

Now,

b = Bar.new(params[...])
f.bars << b  <-- This should set the foreign key in b automatically.

But I get a ''key not found'' problem.  I get the same problem
if I do:

f.bars.create(params[...])

Thanks for everything.




On 5/23/06, Sam Donaldson <samonderous@gmail.com>
wrote:>
>  If the intention of the transaction was to remove the f from the
> Foo.create if something went wrong then it seems like it doesn''t
work
> because i''m able to successfully insert a row for foo while bar
errored out.
>
> Thanks.
>
>
>  On 5/23/06, Sam Donaldson <samonderous@gmail.com> wrote:
> >
> >  Do I have to start a transaction since we know bar can only be saved
if
> > f is saved.  I mean, say for example f for some reason does not
validate and
> > is therefore not saved, will bar still be saved in the table?
> >
> > Thanks.
> >
> >
> >  On 5/23/06, Jonathan Viney <jonathan.viney@gmail.com > wrote:
> > >
> > > I''m guessing you have foreign keys defined?
> > >
> > > You won''t be able to save a Bar until it''s
associated Foo has been
> > > saved. Also, you probably need to add the Bar to the Foo after
the Foo
> > > has been saved so that the foreign key on the Bar is set
correctly.
> > >
> > > When you are trying to save f, it tries to save the associated
Bar
> > > objects first, which will fail because their foreign key is not
set.
> > > You probably need to do something like...
> > >
> > > ActiveRecord::Base.transaction do
> > > f = Foo.create(:a => 10)
> > > f.bars.create(:a => 10)
> > > end
> > >
> > > -Jonathan.
> > >
> > > On 5/23/06, Sam Donaldson <samonderous@gmail.com> wrote:
> > > >
> > > > Hello,
> > > >
> > > > I have the following structure:
> > > >
> > > > model foo
> > > >   has_many :bars:,
> > > >                   :dependent => true
> > > > end
> > > >
> > > > model bar
> > > >   belongs_to :foo
> > > > end
> > > >
> > > > In my action, when i try to save foo:
> > > >
> > > > def save
> > > >   begin
> > > >     f = foo.new
> > > >     f.a = 5
> > > >
> > > >     begin
> > > >       b = bar.new
> > > >       b.a = 10
> > > >       f.bars << b
> > > >     rescue Exception => exc
> > > >       ...
> > > >     end
> > > >
> > > >     f.save!     <-- This does not happen successfully,
and I end up
> > > in the
> > > > exception handler with ''key not found''
> > > >   rescue Exception => exc
> > > >     ...
> > > >   end
> > > > end
> > > >
> > > > Would anybody know what''s going wrong here?  Do I
need to save f
> > > first?
> > > >
> > > > Thanks.
> > > >
> > > > _______________________________________________
> > > > Rails mailing list
> > > > Rails@lists.rubyonrails.org
> > > > http://lists.rubyonrails.org/mailman/listinfo/rails
> > > >
> > > >
> > > >
> > > _______________________________________________
> > > Rails mailing list
> > > Rails@lists.rubyonrails.org
> > > http://lists.rubyonrails.org/mailman/listinfo/rails
> > >
> >
> >
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