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mel ram

2008-Jun-02 21:46 UTC

collection_select not doing what it should... any ideas?

I get the error ActiveRecord::AssociationTypeMismatch
(Course(#23456280859460) expected, got String(#23757015656420))

when i submit an update with the code below. Any ideas on what is
going on?

## /views/enrollment/edit.html.erb

<% form_for(@enrollment) do |f| %>

  <%= f.collection_select :course, @courses, :id, :name %>

  <%= f.submit "Update" %>

<% end %>

## /controllers/enrollment_controller.rb

  def edit
    @enrollment = Enrollment.find(params[:id])
    @courses = Course.find(:all)
  end

  def update
    @enrollment = Enrollment.find(params[:id])

    respond_to do |format|
      if @enrollment.update_attributes(params[:enrollment])
        flash[:notice] = ''Enrollment was successfully
updated.''
        format.html { redirect_to(@enrollment) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @enrollment.errors, :status
=> :unprocessable_entity }
      end
    end
  end

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Joshua Abbott

2008-Jun-02 22:06 UTC

head link

Re: collection_select not doing what it should... any ideas?

Melvin,

You need to reference the method, not the object in your collection 
select.

So instead of using ":course":

<pre><%= f.collection_select :course, @courses, :id, :name
%></pre>

It should be ":course_id":

<pre><%= f.collection_select :course_id, @courses, :id, :name
%></pre>

Try that and see if it works.

-- Josh N. Abbott


Melvin Ram wrote:> I get the error ActiveRecord::AssociationTypeMismatch
> (Course(#23456280859460) expected, got String(#23757015656420))
> 
> when i submit an update with the code below. Any ideas on what is
> going on?
> 
> ## /views/enrollment/edit.html.erb
> 
> <% form_for(@enrollment) do |f| %>
> 
>   <%= f.collection_select :course, @courses, :id, :name %>
> 
>   <%= f.submit "Update" %>
> 
> <% end %>
> 
> ## /controllers/enrollment_controller.rb
> 
>   def edit
>     @enrollment = Enrollment.find(params[:id])
>     @courses = Course.find(:all)
>   end
> 
>   def update
>     @enrollment = Enrollment.find(params[:id])
> 
>     respond_to do |format|
>       if @enrollment.update_attributes(params[:enrollment])
>         flash[:notice] = ''Enrollment was successfully
updated.''
>         format.html { redirect_to(@enrollment) }
>         format.xml  { head :ok }
>       else
>         format.html { render :action => "edit" }
>         format.xml  { render :xml => @enrollment.errors, :status
> => :unprocessable_entity }
>       end
>     end
>   end
-- 
Posted via http://www.ruby-forum.com/.

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mel ram

2008-Jun-02 22:16 UTC

head link

Re: collection_select not doing what it should... any ideas?

I''ve tried that as well... and it actually does update the enrollment
record... but instead of adding the id of the course, it inserts the
course itself i.e #<Course:0x2aaaae913bf0>

On Jun 2, 3:06 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Melvin,
>
> You need to reference the method, not the object in your collection
> select.
>
> So instead of using ":course":
>
> <pre><%= f.collection_select :course, @courses, :id, :name
%></pre>
>
> It should be ":course_id":
>
> <pre><%= f.collection_select :course_id, @courses, :id, :name
%></pre>
>
> Try that and see if it works.
>
> -- Josh N. Abbott
>
>
>
> Melvin Ram wrote:
> > I get the error ActiveRecord::AssociationTypeMismatch
> > (Course(#23456280859460) expected, got String(#23757015656420))
>
> > when i submit an update with the code below. Any ideas on what is
> > going on?
>
> > ## /views/enrollment/edit.html.erb
>
> > <% form_for(@enrollment) do |f| %>
>
> >   <%= f.collection_select :course, @courses, :id, :name %>
>
> >   <%= f.submit "Update" %>
>
> > <% end %>
>
> > ## /controllers/enrollment_controller.rb
>
> >   def edit
> >     @enrollment = Enrollment.find(params[:id])
> >     @courses = Course.find(:all)
> >   end
>
> >   def update
> >     @enrollment = Enrollment.find(params[:id])
>
> >     respond_to do |format|
> >       if @enrollment.update_attributes(params[:enrollment])
> >         flash[:notice] = ''Enrollment was successfully
updated.''
> >         format.html { redirect_to(@enrollment) }
> >         format.xml  { head :ok }
> >       else
> >         format.html { render :action => "edit" }
> >         format.xml  { render :xml => @enrollment.errors, :status
> > => :unprocessable_entity }
> >       end
> >     end
> >   end
>
> --
> Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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Joshua Abbott

2008-Jun-02 22:29 UTC

head link

Re: collection_select not doing what it should... any ideas?

That''s odd. Are you declaring your associations in the models? Also
what
version of Rails are you using?

-- Josh

Melvin Ram wrote:> I''ve tried that as well... and it actually does update the
enrollment
> record... but instead of adding the id of the course, it inserts the
> course itself i.e #<Course:0x2aaaae913bf0>
> 
> On Jun 2, 3:06 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
-- 
Posted via http://www.ruby-forum.com/.

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mel ram

2008-Jun-02 22:36 UTC

head link

Re: collection_select not doing what it should... any ideas?

rails -v => 2.1

class Enrollment < ActiveRecord::Base
  belongs_to :course
  belongs_to :user
end

class Course < ActiveRecord::Base
  has_many :lessons
  belongs_to :user
  has_many :enrollments
end


On Jun 2, 3:29 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> That''s odd. Are you declaring your associations in the models?
Also what
> version of Rails are you using?
>
> -- Josh
>
> Melvin Ram wrote:
> > I''ve tried that as well... and it actually does update the
enrollment
> > record... but instead of adding the id of the course, it inserts the
> > course itself i.e #<Course:0x2aaaae913bf0>
>
> > On Jun 2, 3:06 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> --
> Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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Joshua Abbott

2008-Jun-02 23:07 UTC

head link

Re: collection_select not doing what it should... any ideas?

Is the column type "int" in your database? It doesn''t seem
like it could
be if it can store #<Course:0x2aaaae913bf0>. I''m not saying
that''s the
solution to this problem, but it could be confusing Rails a bit.

And you are no longer referencing :course, it''s now :course_id, huh?

Let me know your course_id column type is and I''ll keep digging around.

-- Josh


Melvin Ram wrote:> rails -v => 2.1
> 
> class Enrollment < ActiveRecord::Base
>   belongs_to :course
>   belongs_to :user
> end
> 
> class Course < ActiveRecord::Base
>   has_many :lessons
>   belongs_to :user
>   has_many :enrollments
> end
> 
> 
> On Jun 2, 3:29 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
-- 
Posted via http://www.ruby-forum.com/.

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mel ram

2008-Jun-02 23:22 UTC

head link

Re: collection_select not doing what it should... any ideas?

Thanks Josh for all your help!

The column was created using migrations with the following code:

create_table :enrollments do |t|
   t.references :course
   # other columns
end

Right now I''m creating a new bare-bones app to see if I can simplify
the code... I''ll let you know if I can get it working in there.



On Jun 2, 4:07 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Is the column type "int" in your database? It doesn''t
seem like it could
> be if it can store #<Course:0x2aaaae913bf0>. I''m not saying
that''s the
> solution to this problem, but it could be confusing Rails a bit.
>
> And you are no longer referencing :course, it''s now :course_id,
huh?
>
> Let me know your course_id column type is and I''ll keep digging
around.
>
> -- Josh
>
>
>
> Melvin Ram wrote:
> > rails -v => 2.1
>
> > class Enrollment < ActiveRecord::Base
> >   belongs_to :course
> >   belongs_to :user
> > end
>
> > class Course < ActiveRecord::Base
> >   has_many :lessons
> >   belongs_to :user
> >   has_many :enrollments
> > end
>
> > On Jun 2, 3:29 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> --
> Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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Joshua Abbott

2008-Jun-02 23:30 UTC

head link

Re: collection_select not doing what it should... any ideas?

Hmm... so even that''s right. Definitely let me where you end up with a 
bare-bones app. I''ve never heard of this happening, so I''ll be
very
curious in case I or someone I know happens to run into someday.

-- Josh

Melvin Ram wrote:> Thanks Josh for all your help!
> 
> The column was created using migrations with the following code:
> 
> create_table :enrollments do |t|
>    t.references :course
>    # other columns
> end
> 
> Right now I''m creating a new bare-bones app to see if I can
simplify
> the code... I''ll let you know if I can get it working in there.
> 
> 
> 
> On Jun 2, 4:07 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
-- 
Posted via http://www.ruby-forum.com/.

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mel ram

2008-Jun-02 23:35 UTC

head link

Re: collection_select not doing what it should... any ideas?

It works just fine in my bare bones app with the code below. Gotta
comment out parts of my app to see what is messing things up.

# erratas_controller.rb

  def edit
    @errata = Errata.find(params[:id])
    @books = Book.find(:all)
  end

# model/book.rb

class Book < ActiveRecord::Base
  has_many :erratas
end

# models/errata.rb

class Errata < ActiveRecord::Base
  belongs_to :book
end

# views/errata/edit.html.erb

<% form_for(@errata) do |f| %>
  <p>
    <b>Book</b><br />
    <%= f.collection_select :book_id, @books, :id, :name %>
  </p>

  <p>
    <%= f.submit "Update" %>
  </p>
<% end %>

# views/errata/show.html.erb

  Book ID: <%=h @errata.book_id %>

On Jun 2, 4:30 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Hmm... so even that''s right. Definitely let me where you end up
with a
> bare-bones app. I''ve never heard of this happening, so
I''ll be very
> curious in case I or someone I know happens to run into someday.
>
> -- Josh
>
>
>
> Melvin Ram wrote:
> > Thanks Josh for all your help!
>
> > The column was created using migrations with the following code:
>
> > create_table :enrollments do |t|
> >    t.references :course
> >    # other columns
> > end
>
> > Right now I''m creating a new bare-bones app to see if I can
simplify
> > the code... I''ll let you know if I can get it working in
there.
>
> > On Jun 2, 4:07 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> --
> Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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mel ram

2008-Jun-02 23:56 UTC

head link

Re: collection_select not doing what it should... any ideas?

I was doing a stupid error.

In my show.html.erb where it was outputting #<Course:0x2aaaae913bf0>,
I was rendering @enrollment.course instead of @enrollment.course_id.
So it was rendering the course object.

Dumb huh? :D

On Jun 2, 4:35 pm, mel ram
<mel...-IA9i2KS8NFBpEKysQ+xqfPpXobYPEAuW@public.gmane.org>
wrote:> It works just fine in my bare bones app with the code below. Gotta
> comment out parts of my app to see what is messing things up.
>
> # erratas_controller.rb
>
>   def edit
>     @errata = Errata.find(params[:id])
>     @books = Book.find(:all)
>   end
>
> # model/book.rb
>
> class Book < ActiveRecord::Base
>   has_many :erratas
> end
>
> # models/errata.rb
>
> class Errata < ActiveRecord::Base
>   belongs_to :book
> end
>
> # views/errata/edit.html.erb
>
> <% form_for(@errata) do |f| %>
>   <p>
>     <b>Book</b><br />
>     <%= f.collection_select :book_id, @books, :id, :name %>
>   </p>
>
>   <p>
>     <%= f.submit "Update" %>
>   </p>
> <% end %>
>
> # views/errata/show.html.erb
>
>   Book ID: <%=h @errata.book_id %>
>
> On Jun 2, 4:30 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
>
> > Hmm... so even that''s right. Definitely let me where you end
up with a
> > bare-bones app. I''ve never heard of this happening, so
I''ll be very
> > curious in case I or someone I know happens to run into someday.
>
> > -- Josh
>
> > Melvin Ram wrote:
> > > Thanks Josh for all your help!
>
> > > The column was created using migrations with the following code:
>
> > > create_table :enrollments do |t|
> > >    t.references :course
> > >    # other columns
> > > end
>
> > > Right now I''m creating a new bare-bones app to see if I
can simplify
> > > the code... I''ll let you know if I can get it working in
there.
>
> > > On Jun 2, 4:07 pm, Joshua Abbott
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>
> > --
> > Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~
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Joshua Abbott

2008-Jun-03 00:03 UTC

head link

Re: collection_select not doing what it should... any ideas?

Ha. I''ve done that before :D

I guess the red flag should''ve definitely been when you said you were 
saving #<Course:0x2aaaae913bf0> into an integer column. MySQL
wouldn''t
have let that happen because that''s clearly not an integer.

Glad you got it sorted out!

-- Josh

Melvin Ram wrote:> I was doing a stupid error.
> 
> In my show.html.erb where it was outputting #<Course:0x2aaaae913bf0>,
> I was rendering @enrollment.course instead of @enrollment.course_id.
> So it was rendering the course object.
> 
> Dumb huh? :D
-- 
Posted via http://www.ruby-forum.com/.

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Rails - Jun 2008 - collection_select not doing what it should... any ideas?

collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?

Re: collection_select not doing what it should... any ideas?