thr3ads.net - Rails - Last object edited appearing in form on new object page [Nov 2006]

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Dinshaw Gobhai

2006-Nov-04 00:06 UTC

Last object edited appearing in form on new object page

So my last two projects i keep getting this wierd thing...

The last opbejct I created repopulates my edit form when i go to create 
a new object WITHOUT THE ID BEINNG PASSED.
Where is it getting this id from?

I have a edit function in my controller ala rails recipies ''cleaning up
your controller'' page:

def edit
  #for a parent id
  @sport = Sport.find(params[:sport_id])

  #for a select list
  @field_types = FieldType.find(:all)

  @sport_field = SportField.find_by_id(params[:id]) || SportField.new

  #log output below
  logger.error(@sport_field.id)

  if request.post?
    @sport_field.attributes = params[:sport_field]
    @sport.sport_fields << @sport_field
    redirect_to :action => "list", :sport_id =>
params[:sport_id] and
return if @sport_field.save
  end
end

So if i hit my list page and then click the new link (<%= link_to "New 
field for: #{@sport.name}", :action => ''edit'',
:sport_id => @sport.id
%>)
everything is cool and my new object is created and saved, I am 
redirected back to the list page

Now if I hit new again it somehow finds the last object i created and 
popuates the field values AND the form action with the id of the 
previous object.

This is the wierdest thing.... the log file:
-----
Processing SportFieldController#edit (for 127.0.0.1 at 2006-11-03 
18:57:09) [GET]
  Session ID: 5d3f3c4e8af29b3ad4dc5da66034a1cd
  Parameters: {"action"=>"edit",
"sport_id"=>"9",
"controller"=>"admin/sport_field"}
  Sport Columns (0.008294)   SHOW FIELDS FROM sports
  Sport Load (0.006463)   SELECT * FROM sports WHERE (sports.id = 9)
  FieldType Load (0.000939)   SELECT * FROM field_types
  SportField Columns (0.007362)   SHOW FIELDS FROM sport_fields
  SportField Load (0.007752)   SELECT * FROM sport_fields WHERE 
(sport_fields.`id` IS NULL ) LIMIT 1
41
Rendering  within layouts/main
Rendering admin/sport_field/edit

------
So it selects the opject with ID NULL but finds and logs a id of 40 (in 
this case)

I have switched to database session mgmt just in case. No change.
Anybody seen this before?
Thanks,
-Dinshaw

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Mark Reginald James

2006-Nov-04 01:49 UTC

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Re: Last object edited appearing in form on new object page

Dinshaw Gobhai wrote:
>   @sport_field = SportField.find_by_id(params[:id]) || SportField.new
> 
>   #log output below
>   logger.error(@sport_field.id)
> ...
>   SportField Load (0.007752)   SELECT * FROM sport_fields WHERE 
> (sport_fields.`id` IS NULL ) LIMIT 1
> 41
> ------
> So it selects the opject with ID NULL but finds and logs a id of 40 (in 
> this case)
Which database adapter and Rails version are you using?

In any case it''d be better to switch to:

@sport_field = params[:id] ? SportField.find(params[:id]) : SportField.new

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Alex Wayne

2006-Nov-04 07:59 UTC

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Re: Last object edited appearing in form on new object page

Dinshaw Gobhai wrote:> This is the wierdest thing.... the log file:
> -----
> Processing SportFieldController#edit (for 127.0.0.1 at 2006-11-03 
> 18:57:09) [GET]
>   Session ID: 5d3f3c4e8af29b3ad4dc5da66034a1cd
>   Parameters: {"action"=>"edit",
"sport_id"=>"9",
> "controller"=>"admin/sport_field"}
>   Sport Columns (0.008294)   SHOW FIELDS FROM sports
>   Sport Load (0.006463)   SELECT * FROM sports WHERE (sports.id = 9)
>   FieldType Load (0.000939)   SELECT * FROM field_types
>   SportField Columns (0.007362)   SHOW FIELDS FROM sport_fields
>   SportField Load (0.007752)   SELECT * FROM sport_fields WHERE 
> (sport_fields.`id` IS NULL ) LIMIT 1
> 41
> Rendering  within layouts/main
> Rendering admin/sport_field/edit
> 
> ------
> So it selects the opject with ID NULL but finds and logs a id of 40 (in 
> this case)
Sounds bizarre.

There is a plugin called query trace:
http://www.agilewebdevelopment.com/plugins/querytrace

It places a little call stack in you log file by each sql statement. 
This should tell you where these queries are getting called from at 
least.

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Dinshaw Gobhai

2006-Nov-07 15:18 UTC

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Re: Last object edited appearing in form on new object page

Hi and thanks for the reply.
I am using mysql and i checked out the head of the repository into 
vendor at the begining of this month.

Here is something else strange, if you  refreash the page that has the 
phantom object''s info, it goes away and acts as if (correctly) I was 
createing a new object.

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Mark Reginald James

2006-Nov-07 17:29 UTC

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Re: Last object edited appearing in form on new object page

Dinshaw Gobhai wrote:> Hi and thanks for the reply.
> I am using mysql and i checked out the head of the repository into 
> vendor at the begining of this month.
> 
> Here is something else strange, if you  refreash the page that has the 
> phantom object''s info, it goes away and acts as if (correctly) I
was
> createing a new object.
The reason for what you''re seeing was just described in another thread:
    http://www.ruby-forum.com/topic/70940#164187

So change your code in the way suggested in this post, which is
the same as I suggested in my original reply.

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Dinshaw Gobhai

2006-Nov-07 17:44 UTC

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Re: Last object edited appearing in form on new object page

Mark Reginald James wrote:
> So change your code in the way suggested in this post, which is
> the same as I suggested in my original reply.
> 
Thank you very much Mark. I was heistant to change that because it is 
straight out ot Rails Recipies. I will plug in your fix as soon as I am 
off the clock.
Thanks again
-Dinshaw

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Rails - Nov 2006 - Last object edited appearing in form on new object page

Last object edited appearing in form on new object page

Re: Last object edited appearing in form on new object page

Re: Last object edited appearing in form on new object page

Re: Last object edited appearing in form on new object page

Re: Last object edited appearing in form on new object page

Re: Last object edited appearing in form on new object page