Using ActiveRecord in FXRuby application

[Sarat Kongara]

Hello,
I am a newbie to FXRuby development.

I like the fact that I can write the code in Ruby for cross-platform
GUI development. I am developing a desktop application that needs to
save some information to a database. I am using ActiveRecord for this
purpose.

My code works fine when I don't require fox16 and include Fox. But
once I do that I get a bunch of warnings.

Here is the sample code:

require 'rubygems'
require 'active_record'

require File.expand_path(File.dirname(__FILE__) + "/question_set")

# require 'fox16'
# include Fox

question_set = QuestionSet.new

3.times do
  question = Question.new

  4.times do
    choice = Choice.new
    question.choices << choice
  end

  question_set.questions << question
end

question_set.save!

QuestionSet, Question and Choice inherit from ActiveRecord::Base
QuestionSet has many questions, Question has many choices.

If I uncomment the following two lines

# require 'fox16'
# include Fox

I get these warnings.

/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @choices not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/database_statements.rb:116:
warning: instance variable @transaction_joinable not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @questions not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @choices not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @choices not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question_set not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question_set not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question_set not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/associations.rb:100:
warning: instance variable @question not initialized

I tried changing the sequence of require statements but I still get
the same warnings. Has anybody been able to use ActiveRecord in FXRuby
application? Any help/suggestion is really appreciated. Thanks for
your time.

Regards
Sarat
_______________________________________________
fxruby-users mailing list
fxruby-users@...
http://rubyforge.org/mailman/listinfo/fxruby-users

[Lyle Johnson-4]

On May 6, 2009, at 8:02 AM, Sarat Kongara wrote:

> My code works fine when I don't require fox16 and include Fox. But
> once I do that I get a bunch of warnings.

<snip>

Since they are warning messages, they shouldn't be causing your  
program to fail (you just get a lot of noise in the console window).  
But I have a guess of what might fix it, if you can try something for  
me locally.

For the purpose of this discussion, I'm going to assume that you've  
installed FXRuby via RubyGems, and that it's installed here:

        /opt/local/lib/ruby/gems/1.8/gems/fxruby-1.6.19

I want you to make changes to two lines in this file from the FXRuby  
installation:

        /opt/local/lib/ruby/gems/1.8/gems/fxruby-1.6.19/lib/fox16/kwargs.rb

The first line I want you to change is line 3. It currently reads:

        $VERBOSE = nil

and I want you to change it to:

        old_verbose = $VERBOSE; $VERBOSE = nil

The other line I want you to change is line 2740 (the last line),  
which currently reads:

        $VERBOSE = true

and I want you to change it to read:

        $VERBOSE = old_verbose

When you've changed those two lines, try running your program again  
and let's see if that doesn't clear up all those warnings from  
ActiveRecord.

Hope this helps,

Lyle

_______________________________________________
fxruby-users mailing list
fxruby-users@...
http://rubyforge.org/mailman/listinfo/fxruby-users

[Sarat Kongara]

Hi Lyle,
Thanks for the quick response. I actually followed instructions from
your FXRuby book (Create Lean and Mean GUIs with Ruby). I used the
command: "sudo port install rb-fxruby"  to install fxruby.

I found the file kwargs.rb in this folder:
/opt/local/lib/ruby/vendor_ruby/1.8/fox16
I made the changes you suggested and I don't see any warnings now.
Earlier I also used to get a warning from rscribd gem code when I am
using fox16, now that is gone too.

Is it safe to ignore these warnings and keep the changes in the file
kwargs.rb permanently? Thanks again.

Regards
Sarat

On 5/6/09, Lyle Johnson <lyle@...> wrote:

>
> On May 6, 2009, at 8:02 AM, Sarat Kongara wrote:
>
>> My code works fine when I don't require fox16 and include Fox. But
>> once I do that I get a bunch of warnings.
>
> <snip>
>
> Since they are warning messages, they shouldn't be causing your
> program to fail (you just get a lot of noise in the console window).
> But I have a guess of what might fix it, if you can try something for
> me locally.
>
> For the purpose of this discussion, I'm going to assume that you've
> installed FXRuby via RubyGems, and that it's installed here:
>
> /opt/local/lib/ruby/gems/1.8/gems/fxruby-1.6.19
>
> I want you to make changes to two lines in this file from the FXRuby
> installation:
>
> /opt/local/lib/ruby/gems/1.8/gems/fxruby-1.6.19/lib/fox16/kwargs.rb
>
> The first line I want you to change is line 3. It currently reads:
>
> $VERBOSE = nil
>
> and I want you to change it to:
>
> old_verbose = $VERBOSE; $VERBOSE = nil
>
> The other line I want you to change is line 2740 (the last line),
> which currently reads:
>
> $VERBOSE = true
>
> and I want you to change it to read:
>
> $VERBOSE = old_verbose
>
> When you've changed those two lines, try running your program again
> and let's see if that doesn't clear up all those warnings from
> ActiveRecord.
>
> Hope this helps,
>
> Lyle
>
> _______________________________________________
> fxruby-users mailing list
> fxruby-users@...
> http://rubyforge.org/mailman/listinfo/fxruby-users
>

_______________________________________________
fxruby-users mailing list
fxruby-users@...
http://rubyforge.org/mailman/listinfo/fxruby-users

[Lyle Johnson-4]

On May 6, 2009, at 10:17 AM, Sarat Kongara wrote:

> I made the changes you suggested and I don't see any warnings now.

Excellent.

> Earlier I also used to get a warning from rscribd gem code when I am
> using fox16, now that is gone too.

OK.

> Is it safe to ignore these warnings and keep the changes in the file
> kwargs.rb permanently? Thanks again.

Yes to both questions. I will implement this change in the next  
release of FXRuby, so when you upgrade to FXRuby 1.6.20 you won't need  
to re-patch your kwargs.rb file.

Thanks for your help,

Lyle
_______________________________________________
fxruby-users mailing list
fxruby-users@...
http://rubyforge.org/mailman/listinfo/fxruby-users