Rails - Sep 2010 - weird stuff: validate_uniqueness_of with :scope does not work

Running rails 2.3.8.

I have a two models defined like this

class Member
  has_many :folders
  before_save: create_default_folders

protected
  def create_default_folders!
    %w{Inbox Sent}.each do |folder|
	unless self.folders.find_by_name(folder)
	  self.folders.create!(:name => folder, :deletable => false)
	end
    end
  end
end


class Folder
  belongs_to :member
  # folder names must be unique for each user
  validates_uniqueness_of :name, :scope => [:member_id], :allow_blank
=> false,
      :case_sensitive => false, :message => ''already exists for
this
member''
end

------ MembersController
def create
    @member = Member.new(params[:member])

    if @member.save
         ...
    end
end



So as you can see, what I wish to get when I save a new Member are two
default folders colled (Inbox and Sent).
So I defined the after_save callback. I tested it in script/console
and it works whenever I build and save a Member.

However, as soon as I create a member through a controller-backed
form, the uniqueness validation gets tripped up.  I get validation
error from my validates_uniqueness_of as "Folder already exists for
this member". Which shouldn''t happen.

For some strange reason :scope gets ignored and thus uniqueness check
isn''t properly scoped by member_id...

The weird part is that it all works in script/console, but not via web
forms.

Any suggestions???

Thanks in advance!

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On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> However, as soon as I create a member through a controller-backed
> form, the uniqueness validation gets tripped up.  I get validation
> error from my validates_uniqueness_of as "Folder already exists for
> this member". Which shouldn''t happen.
>
> For some strange reason :scope gets ignored and thus uniqueness check
> isn''t properly scoped by member_id...
>
> The weird part is that it all works in script/console, but not via web
> forms.
>
Is there some odd interaction because you''re creating these folders
from a before_save  (ie the member''s id has not yet been set)?

Fred
> Any suggestions???
>
> Thanks in advance!
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dont use the before_save use transactions that way it will roll back both
actions if there is an error.
and dont use that function you have with the each and all use

find_or_create_by_name(name)

it does what you want.


On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung
<frederick.cheung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> wrote:
>
>
> On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > However, as soon as I create a member through a controller-backed
> > form, the uniqueness validation gets tripped up.  I get validation
> > error from my validates_uniqueness_of as "Folder already exists
for
> > this member". Which shouldn''t happen.
> >
> > For some strange reason :scope gets ignored and thus uniqueness check
> > isn''t properly scoped by member_id...
> >
> > The weird part is that it all works in script/console, but not via web
> > forms.
> >
>
> Is there some odd interaction because you''re creating these
folders
> from a before_save  (ie the member''s id has not yet been set)?
>
> Fred
>
> > Any suggestions???
> >
> > Thanks in advance!
>
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That''s what I thought originally about id not being set... but why
does it work from script/console ?
That kind of puzzles me...

On Sep 7, 5:20 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> Is there some odd interaction because you''re creating these
folders
> from a before_save  (ie the member''s id has not yet been set)?
>
> Fred
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That code must''ve been 5th iteration of trying to get that call back
to work.

I''ve tried your suggested method.
I''ve so tried create/create!, save/save!.

Everything work from console.
That is I can do
m = Member.new
m.x = "value"
m.folders.find_or_create_by_name(''folder_name")
m.save

It all work beautifully from console. I can test my validation, it
works.

But as soon as I do the same thing (create new Member) from controller
context via form params, the scoped validates_uniqueness_of does not
function as expected.

--
Swartz

On Sep 7, 8:33 am, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> dont use the before_save use transactions that way it will roll back both
> actions if there is an error.
> and dont use that function you have with the each and all use
>
> find_or_create_by_name(name)
>
> it does what you want.
>
> On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung
<frederick.che...@gmail.com
>
> > wrote:
>
> > On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > However, as soon as I create a member through a controller-backed
> > > form, the uniqueness validation gets tripped up.  I get
validation
> > > error from my validates_uniqueness_of as "Folder already
exists for
> > > this member". Which shouldn''t happen.
>
> > > For some strange reason :scope gets ignored and thus uniqueness
check
> > > isn''t properly scoped by member_id...
>
> > > The weird part is that it all works in script/console, but not
via web
> > > forms.
>
> > Is there some odd interaction because you''re creating these
folders
> > from a before_save  (ie the member''s id has not yet been
set)?
>
> > Fred
>
> > > Any suggestions???
>
> > > Thanks in advance!
>
> > --
> > You received this message because you are subscribed to the Google
Groups
> > "Ruby on Rails: Talk" group.
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Also note that I have to set at least one other folder attribute while
creating a folder ,
so this variant doesn''t help me much.

On Sep 7, 8:33 am, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> dont use the before_save use transactions that way it will roll back both
> actions if there is an error.
> and dont use that function you have with the each and all use
>
> find_or_create_by_name(name)
>
> it does what you want.
>
> On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung
<frederick.che...@gmail.com
>
> > wrote:
>
> > On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > However, as soon as I create a member through a controller-backed
> > > form, the uniqueness validation gets tripped up.  I get
validation
> > > error from my validates_uniqueness_of as "Folder already
exists for
> > > this member". Which shouldn''t happen.
>
> > > For some strange reason :scope gets ignored and thus uniqueness
check
> > > isn''t properly scoped by member_id...
>
> > > The weird part is that it all works in script/console, but not
via web
> > > forms.
>
> > Is there some odd interaction because you''re creating these
folders
> > from a before_save  (ie the member''s id has not yet been
set)?
>
> > Fred
>
> > > Any suggestions???
>
> > > Thanks in advance!
>
> > --
> > You received this message because you are subscribed to the Google
Groups
> > "Ruby on Rails: Talk" group.
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> > .
> > For more options, visit this group at
> >http://groups.google.com/group/rubyonrails-talk?hl=en.
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check your attri_accesible, and check if you rae using a gem that uses
attr_protected, it appears you have a problem with mass assignment and you
cant see from one controller the attribute that member_id from the folder
controller i think you need to be able to , also note that with before save
there is no member_id in the database to compare the validation with thats
why i said you should use a transaction and create everything from the
member controller like this

Member.transaction do
@member.new(blah, blah)
@member.save!
 params[:folder_name].nil? ? name= "Default" : name =
params[:folder_name]
@folder = Folder.find(:conditions =>{:name = name, :member_id=>
@member.id})

@folder ||= Folder.new(blah blah)
@folder.member = @member
@folder.save!
end

try that, the code inside the transaction will rollback if either to the
save fail and everything will go back to the its original state.

On Tue, Sep 7, 2010 at 2:09 PM, Swartz
<netvent-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Also note that I have to set at least one other folder attribute while
> creating a folder ,
> so this variant doesn''t help me much.
>
> On Sep 7, 8:33 am, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > dont use the before_save use transactions that way it will roll back
both
> > actions if there is an error.
> > and dont use that function you have with the each and all use
> >
> > find_or_create_by_name(name)
> >
> > it does what you want.
> >
> > On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung <
> frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> >
> > > wrote:
> >
> > > On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> > > > However, as soon as I create a member through a
controller-backed
> > > > form, the uniqueness validation gets tripped up.  I get
validation
> > > > error from my validates_uniqueness_of as "Folder
already exists for
> > > > this member". Which shouldn''t happen.
> >
> > > > For some strange reason :scope gets ignored and thus
uniqueness check
> > > > isn''t properly scoped by member_id...
> >
> > > > The weird part is that it all works in script/console, but
not via
> web
> > > > forms.
> >
> > > Is there some odd interaction because you''re creating
these folders
> > > from a before_save  (ie the member''s id has not yet been
set)?
> >
> > > Fred
> >
> > > > Any suggestions???
> >
> > > > Thanks in advance!
> >
> > > --
> > > 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
> > >
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> >
> > > .
> > > For more options, visit this group at
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>
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I''ve created a brand new Rails 2.3.8 app.
No gems, nothing.

I created only the bare necessities:
Two models (Member and Folder)
one controller (MembersController with only new and create actions)
one view (new).

I can create one member with default folders as per my callback (the
very first one), but any subsequent members don''t get default folders
created for them.

But again, when I try the same thing from script/console everything
works (I create new member and, bam, two folders come into existence
as well)..

w t f....




On Sep 7, 3:31 pm, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> check your attri_accesible, and check if you rae using a gem that uses
> attr_protected, it appears you have a problem with mass assignment and you
> cant see from one controller the attribute that member_id from the folder
> controller i think you need to be able to , also note that with before save
> there is no member_id in the database to compare the validation with thats
> why i said you should use a transaction and create everything from the
> member controller like this
>
> Member.transaction do
> @member.new(blah, blah)
> @member.save!
>  params[:folder_name].nil? ? name= "Default" : name =
params[:folder_name]
> @folder = Folder.find(:conditions =>{:name = name, :member_id=>
@member.id})
>
> @folder ||= Folder.new(blah blah)
> @folder.member = @member
> @folder.save!
> end
>
> try that, the code inside the transaction will rollback if either to the
> save fail and everything will go back to the its original state.
>
> On Tue, Sep 7, 2010 at 2:09 PM, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > Also note that I have to set at least one other folder attribute while
> > creating a folder ,
> > so this variant doesn''t help me much.
>
> > On Sep 7, 8:33 am, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > dont use the before_save use transactions that way it will roll
back both
> > > actions if there is an error.
> > > and dont use that function you have with the each and all use
>
> > > find_or_create_by_name(name)
>
> > > it does what you want.
>
> > > On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung <
> > frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
>
> > > > wrote:
>
> > > > On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > > > However, as soon as I create a member through a
controller-backed
> > > > > form, the uniqueness validation gets tripped up.  I get
validation
> > > > > error from my validates_uniqueness_of as "Folder
already exists for
> > > > > this member". Which shouldn''t happen.
>
> > > > > For some strange reason :scope gets ignored and thus
uniqueness check
> > > > > isn''t properly scoped by member_id...
>
> > > > > The weird part is that it all works in script/console,
but not via
> > web
> > > > > forms.
>
> > > > Is there some odd interaction because you''re
creating these folders
> > > > from a before_save  (ie the member''s id has not yet
been set)?
>
> > > > Fred
>
> > > > > Any suggestions???
>
> > > > > Thanks in advance!
>
> > > > --
> > > > 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
> > .
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> > > >
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> >
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>
> > > > .
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watch this and see if ti helps,

http://railscasts.com/episodes/196-nested-model-form-part-1







On Wed, Sep 8, 2010 at 8:07 PM, Swartz
<netvent-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> I''ve created a brand new Rails 2.3.8 app.
> No gems, nothing.
>
> I created only the bare necessities:
> Two models (Member and Folder)
> one controller (MembersController with only new and create actions)
> one view (new).
>
> I can create one member with default folders as per my callback (the
> very first one), but any subsequent members don''t get default
folders
> created for them.
>
> But again, when I try the same thing from script/console everything
> works (I create new member and, bam, two folders come into existence
> as well)..
>
> w t f....
>
>
>
>
> On Sep 7, 3:31 pm, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > check your attri_accesible, and check if you rae using a gem that uses
> > attr_protected, it appears you have a problem with mass assignment and
> you
> > cant see from one controller the attribute that member_id from the
folder
> > controller i think you need to be able to , also note that with before
> save
> > there is no member_id in the database to compare the validation with
> thats
> > why i said you should use a transaction and create everything from the
> > member controller like this
> >
> > Member.transaction do
> > @member.new(blah, blah)
> > @member.save!
> >  params[:folder_name].nil? ? name= "Default" : name >
params[:folder_name]
> > @folder = Folder.find(:conditions =>{:name = name, :member_id=>
@
> member.id})
> >
> > @folder ||= Folder.new(blah blah)
> > @folder.member = @member
> > @folder.save!
> > end
> >
> > try that, the code inside the transaction will rollback if either to
the
> > save fail and everything will go back to the its original state.
> >
> > On Tue, Sep 7, 2010 at 2:09 PM, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > Also note that I have to set at least one other folder attribute
while
> > > creating a folder ,
> > > so this variant doesn''t help me much.
> >
> > > On Sep 7, 8:33 am, radhames brito
<rbri...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > dont use the before_save use transactions that way it will
roll back
> both
> > > > actions if there is an error.
> > > > and dont use that function you have with the each and all
use
> >
> > > > find_or_create_by_name(name)
> >
> > > > it does what you want.
> >
> > > > On Tue, Sep 7, 2010 at 7:20 AM, Frederick Cheung <
> > > frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> >
> > > > > wrote:
> >
> > > > > On Sep 7, 11:55 am, Swartz
<netv...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> > > > > > However, as soon as I create a member through a
controller-backed
> > > > > > form, the uniqueness validation gets tripped up. 
I get
> validation
> > > > > > error from my validates_uniqueness_of as
"Folder already exists
> for
> > > > > > this member". Which shouldn''t
happen.
> >
> > > > > > For some strange reason :scope gets ignored and
thus uniqueness
> check
> > > > > > isn''t properly scoped by member_id...
> >
> > > > > > The weird part is that it all works in
script/console, but not
> via
> > > web
> > > > > > forms.
> >
> > > > > Is there some odd interaction because you''re
creating these folders
> > > > > from a before_save  (ie the member''s id has
not yet been set)?
> >
> > > > > Fred
> >
> > > > > > Any suggestions???
> >
> > > > > > Thanks in advance!
> >
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