thr3ads.net - Rails - re:Parent-Child Table Relationship Problems (Nathan Mealey) [Sep 2005]

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s c

2005-Sep-04 10:12 UTC

re:Parent-Child Table Relationship Problems (Nathan Mealey)

Hi Nathan,
I don''t see the code, so this is only my guess.  Check if it is
task.project.id instead task.project_id. Somehow the project_id is treated as a
method that doesn''t exist.
 
Sam

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Today''s Topics:

1. Re: Scriptaculous: directions? (Jay Levitt)
2. Re: RMagick problem in OS X (PJ Hyett)
3. ordered hashes Controller -> View (Thomas Balthazar)
4. Re: ordered hashes Controller -> View (Jorge Santiago)
5. Re: Re: Scriptaculous: directions? (Tomas Jogin)
6. validates_uniqueness_of for a group (Dewey Howell)
7. Control break in Rails (Carlos Pavia)
8. Re: Getting a value from datetime_select (Anon)
9. Parent-Child Table Relationship Problems (Nathan Mealey)


----------------------------------------------------------------------

Message: 1
Date: Sat, 3 Sep 2005 17:03:17 -0400
From: Jay Levitt 
Subject: [Rails] Re: Scriptaculous: directions?
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID: 
Content-Type: text/plain; charset="iso-8859-15"

In article
<9B6586EE-B325-4394-B00E-1F4015FA8AB6-9D208sng4xU@public.gmane.org>,
thomas-
9D208sng4xU-XMD5yJDbdMReXY1tMh2IBg@public.gmane.org
says...> I put the effects library to very good use in a (AJAX) product we 
> develop. I wouldn''t have made it if I had no use for it.
> 
> As an example, we put the Shake effect on the login box, when login 
> fails. We''ve sliding in/out property drawers. And so on and so
forth.
> All in all we use effects on 4 or 5 occasions throughout the app 
> where they just make the UI experience much more smooth and enjoyable 
> for the user.
Interesting - put to those uses, I can certainly see how the effects 
could help focus attention on an important control (shake), or literally 
add depth to a UI (drawers).

Any way you could put up a demo showing those functions in their "native 
environment"? I know I just don''t have the imagination to come up
with
that. Likewise, if 10 years ago you''d showed me a new library that 
would draw drop-shadows around a rectangular area, I''d have thought 
"Sure, that''s nice for 3D games", never thinking about its
application
in a window manager. I think an awful lot of developers who are not UI 
designers are going to mimic the uses they see in the demo.

Maybe it''s as important to highlight good uses of these effects as it
is
to code them in the first place... I''d just hate for Rails to get the 
reputation as "that easy-to-use web framework with all the blinking, 
moving stuff". I''m checking out the ajaxpatterns site, and it
looks
pretty interesting, but of course their section on visual effects just 
points back at your existing demo.


-- 
Jay Levitt | 
Wellesley, MA | I feel calm. I feel ready. I can only
Faster: jay at jay dot fm | conclude that''s because I don''t
have a
http://www.jay.fm | full grasp of the situation. - Mark Adler



------------------------------

Message: 2
Date: Sat, 3 Sep 2005 17:08:28 -0500
From: PJ Hyett 

Subject: Re: [Rails] RMagick problem in OS X
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID: 
Content-Type: text/plain; charset=ISO-8859-1

My only suggestion is to look at the OS X readme that comes with the
RMagick tarball and follow it exactly step-by-step. It took me a few
tries, but I eventually figured it out.

-PJ
http://pjhyett.com

On 9/2/05, Pedro Valentini 
wrote:> Hi,
> I''m installed ImageMagick and RMagick in an OS X and when I try to
> require RMagick lib I get this error:
> 
> irb(main):001:0> require ''RMagick''
> dyld: ruby version mismatch for library:
> /usr/X11R6/lib/libfreetype.6.dylib (compatibility version of user:
> 10.0.0 greater than library''s version: 6.3.0)
> Trace/BPT trap
> 
> Someone know what can be wrong?
> Thank you
> 
> --
> 
> Pedro C. Valentini
> pedro-p14LI7ZcAE/pVLaUnt/cCQC/G2K4zDHf@public.gmane.org
> +55 (21) 8708-8035
> 
> 
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

------------------------------

Message: 3
Date: Sun, 4 Sep 2005 01:02:09 +0200
From: Thomas Balthazar 
Subject: [Rails] ordered hashes Controller -> View
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID: 
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Hi everybody,

In my Controller, I''m doing this :

def list
@hash_column_titles = {
''firstname'' => "Name",
''email'' => "E-mail",
''role_id'' => "Role",
''status'' => "Status"
}
end

When I''m in my View, and that I iterate through this Hash, I get the 
values in the wrong order.

@hash_column_titles.each { |column_name, column_label|
...
}

Am I doing something wrong?

What can I do the have my Hash ordered in the same way it was declared?

Thanks in advance for your help.
Have a nice Sunday, all!

Thomas Balthazar.



------------------------------

Message: 4
Date: Sat, 3 Sep 2005 18:14:13 -0500
From: Jorge Santiago 
Subject: Re: [Rails] ordered hashes Controller -> View
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID: 
Content-Type: text/plain; charset=ISO-8859-1

Hi Thomas

Hashes dont respect any order. You have to use an Array.


santiago.

On 9/3/05, Thomas Balthazar wrote:> Hi everybody,
> 
> In my Controller, I''m doing this :
> 
> def list
> @hash_column_titles = {
> ''firstname'' => "Name",
> ''email'' => "E-mail",
> ''role_id'' => "Role",
> ''status'' => "Status"
> }
> end
> 
> When I''m in my View, and that I iterate through this Hash, I get
the
> values in the wrong order.
> 
> @hash_column_titles.each { |column_name, column_label|
> ...
> }
> 
> Am I doing something wrong?
> 
> What can I do the have my Hash ordered in the same way it was declared?
> 
> Thanks in advance for your help.
> Have a nice Sunday, all!
> 
> Thomas Balthazar.
> 
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

------------------------------

Message: 5
Date: Sun, 4 Sep 2005 01:39:45 +0200
From: Tomas Jogin 
Subject: Re: [Rails] Re: Scriptaculous: directions?
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID:
<8c05e657050903163936f66d27-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Content-Type: text/plain; charset=ISO-8859-1
> Interesting - put to those uses, I can certainly see how the effects
> could help focus attention on an important control (shake), or literally
> add depth to a UI (drawers).
> 
> Any way you could put up a demo showing those functions in their
"native
> environment"? I know I just don''t have the imagination to
come up with
> that.
Both those examples are adaptations of UI elements in Mac OS X (which
I too have shamelessly copied in my apps). So for a demo, check out
Mac OS X (the adaptation to the web will be left for you to imagine).

Without the use of Ajax, those effects might very well be pointless
and over-the-top, but in an Ajaxified interface, lacking the normal
browser reload user feedback, as David suggested earlier, those
effects are absolutely necessary in order to provide a userfriendly
interface. An ajax implementation _without_ those effects would be
poor and half-assed.

Regards,
Tomas Jogin


------------------------------

Message: 6
Date: Sat, 3 Sep 2005 18:48:24 -0700
From: Dewey Howell 
Subject: [Rails] validates_uniqueness_of for a group
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID:
<107869500509031848a55da48-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Content-Type: text/plain; charset=ISO-8859-1

Hi 

I have 2 questions:

I want to validate that 3 fields together must be unique. e.g -
first_name, last_name and birth_date.

To ensure 2 fields are unique as a group I can do this:

validates_uniqueness_of :first_name, :scope => "last_name"

1) How do I add the third term so that all three are checked together?

Just to ensure my question is clear:

---John Smith DOB 4/4/1970 and John Smith DOB 4/4/1980 would be
allowed but not if all three fields matched.


2) How do I set it to highlight all three fields but only output one
message like "First name, last name & birth date must be unique"

Thanks,
Dewey


------------------------------

Message: 7
Date: Sat, 3 Sep 2005 22:57:32 -0300
From: Carlos Pavia 
Subject: [Rails] Control break in Rails
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID:
<7a4512630509031857404a5ff-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Content-Type: text/plain; charset="iso-8859-1"

What is the best way to implement a control break, in Rails ?
Suppose we have a table:

CREATE TABLE purchases (
id int not null auto_increment ,
card varchar(20) ,
description varchar(80) ,
amount decimal(10,2)
)

with this data

1, AA, xxxxxxx, 20.45
2, BB, xxxxxxx, 3.45
3, AA, xxxxxxx, 23.45
4, AA, xxxxxxx, 11.22
5, BB, xxxxxxx, 91.77


and we want to make a report like this:

CARD AA
description amount
(...)
description amount

TOTAL CARD AA: total_card


CARD BB
description amount
(...)
description amount

TOTAL CARD BB: total_card

TOTAL PURCHASES: total_purchases


Any help would be appreciated !


Carlos
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Message: 8
Date: Sat, 3 Sep 2005 19:17:16 -0700
From: Anon 
Subject: Re: [Rails] Getting a value from datetime_select
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID:
<9b32a2f50509031917556b8023-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Content-Type: text/plain; charset="iso-8859-1"

snacktime wrote:> I was a little puzzled at this behavior also, and assumed I was probably
> missing something. My solution was to just create a new datetime object 
out> of the elements in the params date hash.
I had this same problem (sent an email to this list with no response). I was 
able to get the date without having to access each element individually. 
Can''t really remember how. (another, unrelated problem I was having was
when
the date was out of range).

I''ll post the code on Tues.
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Message: 9
Date: Sat, 3 Sep 2005 22:18:47 -0400
From: Nathan Mealey 
Subject: [Rails] Parent-Child Table Relationship Problems
To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
Message-ID:
<058E806E-B0B6-4BBB-A4E5-F00523C056B1-mPKOtHdLgT0QaXB9iyTzyw@public.gmane.org>
Content-Type: text/plain; charset="us-ascii"

Hello,

I am having trouble getting the UPDATE and CREATE functions to work 
with a table that has a child relationship to a parent table.

The model for the Task table has a child relationship to the table 
Project. This is stipulated in models/task.rb with: belongs_to :project

The model for the Project table has a parent relationship to the 
table Task. This is stipulated in models/project.rb with: 
has_many :tasks

But when I attempt to update or create a new task, I get this error: 
undefined method ` project_id='' for #

The error page points to controllers/task_controller.rb as the source 
of the error, but the MySQL request that it displays includes a value 
for project_id.

What is wrong here? In the tutorials I have seen, they all indicate 
that by stipulating the parent-child relationship in the model files, 
the update and create statements will simply know what to do.

What am I missing?

Thanks in advance,
Nathan
-- 
Nathan Mealey
Website Manager & Administrative Director
Cycle-Smart, Inc.
P.O. Box 1482
Northampton, MA
01061-1482
nathan-mPKOtHdLgT0QaXB9iyTzyw@public.gmane.org
(413) 210-7984
(512) 681-7043 Fax


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Nathan Mealey

2005-Sep-04 12:01 UTC

head link

re:Parent-Child Table Relationship Problems (Nathan Mealey)

I should have included more info.

This is the code for task.update:
   def update
     @task = Task.find(params[:id])
     if @task.update_attributes(params[:task])
       flash[:notice] = ''Task was successfully updated.''
       redirect_to :action => ''list''
     else
       render :action => ''edit''
     end
   end

This is the code for task.create:

   def create
     @task = Task.new(params[:task])
     if @task.save
       flash[:notice] = ''Task was successfully created.''
       redirect_to :action => ''list''
     else
       render :action => ''new''
     end
   end

And the code in /views/task/_form.rhtml is:

<p><label for="task_project">Project</label>
<select name="task[ project_id]">
   <% @projects.each do |project| %>
    <option value="">Select project</option
    <option value="<%= project.id %>">
     <%= project.name %>
    </option>
   <% end %>
</select></p>

The _form displays fine, and includes the id and name for each  
project. I can understand that the error "undefined method for  
''project_id='' looks like Rails think project_id is a method.
But what
I don''t understand is where this is coming from. The update and  
create methods look right to me...


Thanks,
Nathan
--
Nathan Mealey
Website Manager & Administrative Director
Cycle-Smart, Inc.
P.O. Box 1482
Northampton, MA
01061-1482
nathan-mPKOtHdLgT0QaXB9iyTzyw@public.gmane.org
(413) 210-7984
(512) 681-7043 Fax


On Sep 4, 2005, at 6:12 AM, s c wrote:
> Hi Nathan,
> I don''t see the code, so this is only my guess.  Check if it is  
> task.project.id instead task.project_id. Somehow the project_id is  
> treated as a method that doesn''t exist.
>
> Sam
>
> rails-request-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org 写道：
> Send Rails mailing list submissions to
> rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.rubyonrails.org/mailman/listinfo/rails
> or, via email, send a message with subject or body ''help''
to
> rails-request-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
>
> You can reach the person managing the list at
> rails-owner-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Rails digest..."
>
>
> Today''s Topics:
>
> 1. Re: Scriptaculous: directions? (Jay Levitt)
> 2. Re: RMagick problem in OS X (PJ Hyett)
> 3. ordered hashes Controller -> View (Thomas Balthazar)
> 4. Re: ordered hashes Controller -> View (Jorge Santiago)
> 5. Re: Re: Scriptaculous: directions? (Tomas Jogin)
> 6. validates_uniqueness_of for a group (Dewey Howell)
> 7. Control break in Ra ils (Carlos Pavia)
> 8. Re: Getting a value from datetime_select (Anon)
> 9. Parent-Child Table Relationship Problems (Nathan Mealey)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 3 Sep 2005 17:03:17 -0400
> From: Jay Levitt
> Subject: [Rails] Re: Scriptaculous: directions?
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
> Content-Type: text/plain; charset="iso-8859-15"
>
> In article
<9B6586EE-B325-4394-B00E-1F4015FA8AB6-9D208sng4xU@public.gmane.org>,
thomas-
> 9D208sng4xU-XMD5yJDbdMReXY1tMh2IBg@public.gmane.org says...
> > I put the effects library to very good use in a (AJAX) product we
> > develop. I wouldn''t have made it if I had no use for it.
> >
> > As an example, we put the Shake effect on the login box, when login
> > fails. We''ve sliding in/out property drawers. And so on and
so
> forth.
> > All in all we use effects on 4 or 5 occasions thr oughout the app
> > where they just make the UI experience much more smooth and  
> enjoyable
> > for the user.
>
> Interesting - put to those uses, I can certainly see how the effects
> could help focus attention on an important control (shake), or  
> literally
> add depth to a UI (drawers).
>
> Any way you could put up a demo showing those functions in their  
> "native
> environment"? I know I just don''t have the imagination to
come up with
> that. Likewise, if 10 years ago you''d showed me a new library that
> would draw drop-shadows around a rectangular area, I''d have
thought
> "Sure, that''s nice for 3D games", never thinking about
its application
> in a window manager. I think an awful lot of developers who are not UI
> designers are going to mimic the uses they see in the demo.
>
> Maybe it''s as important to highlight good uses of these effects as
> it is
> to code them in the first place... I''d just hate for Rails to get
the
> reputation as "that eas y-to-use web framework with all the blinking,
> moving stuff". I''m checking out the ajaxpatterns site, and it
looks
> pretty interesting, but of course their section on visual effects just
> points back at your existing demo.
>
>
> -- 
> Jay Levitt |
> Wellesley, MA | I feel calm. I feel ready. I can only
> Faster: jay at jay dot fm | conclude that''s because I
don''t have a
> http://www.jay.fm | full grasp of the situation. - Mark Adler
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 3 Sep 2005 17:08:28 -0500
> From: PJ Hyett
> Subject: Re: [Rails] RMagick problem in OS X
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
> Content-Type: text/plain; charset=ISO-8859-1
>
> My only suggestion is to look at the OS X readme that comes with the
> RMagick tarball and follow it exactly step-by-step. It took me a few
> tries, but I eventually figured it out.
>
> -PJ
> http://pjhyett.com
>
> On 9/2/05, Pedro Valentini wrote:
> > Hi,
> > I''m installed ImageMagick and RMagick in an OS X and when I
try to
> > require RMagick lib I get this error:
> >
> > irb(main):001:0> require ''RMagick''
> > dyld: ruby version mismatch for library:
> > /usr/X11R6/lib/libfreetype.6.dylib (compatibility version of user:
> > 10.0.0 greater than library''s version: 6.3.0)
> > Trace/BPT trap
> >
> > Someone know what can be wrong?
> > Thank you
> >
> > --
> >
> > Pedro C. Valentini
> > pedro-p14LI7ZcAE/pVLaUnt/cCQC/G2K4zDHf@public.gmane.org
> > +55 (21) 8708-8035
> >
> >
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 4 Sep 2005 01:02:09 +0200
> From: Thomas Balthazar
> Subject: [Rails] ordered hashes Controller -> View
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> Hi everybody,
>
> In my Controller, I''m doing this :
>
> def list
> @hash_column_titles = {
> ''firstname'' => "Name",
> ''email'' => "E-mail",
> ''role_id'' => "Role",
> ''status'' => "Status"
> }
> end
>
> When I''m in my View, and that I iterate through this Hash, I get
the
> values in the wrong order.
>
> @hash_column_titles.each { |column_name, column_label|
> ...
> }
>
> Am I doing something wrong?
>
> What can I do the have my Hash ordered in the same way it was  
> declared?
>
> Thanks in advance for your help.
> Have a nice Sunday, all!
>
> Thomas Balthazar.
>
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 3 Sep 2005 18:14:13 -0500
> From: Jo rge Santiago
> Subject: Re: [Rails] ordered hashes Controller -> View
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi Thomas
>
> Hashes dont respect any order. You have to use an Array.
>
>
> santiago.
>
> On 9/3/05, Thomas Balthazar wrote:
> > Hi everybody,
> >
> > In my Controller, I''m doing this :
> >
> > def list
> > @hash_column_titles = {
> > ''firstname'' => "Name",
> > ''email'' => "E-mail",
> > ''role_id'' => "Role",
> > ''status'' => "Status"
> > }
> > end
> >
> > When I''m in my View, and that I iterate through this Hash, I
get the
> > values in the wrong order.
> >
> > @hash_column_titles.each { |column_name, column_label|
> > ...
> > }
> >
> > Am I doing something wrong?
> >
> > What can I do the have my Ha sh ordered in the same way it was  
> declared?
> >
> > Thanks in advance for your help.
> > Have a nice Sunday, all!
> >
> > Thomas Balthazar.
> >
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
>
> ------------------------------
>
> Message: 5
> Date: Sun, 4 Sep 2005 01:39:45 +0200
> From: Tomas Jogin
> Subject: Re: [Rails] Re: Scriptaculous: directions?
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
<8c05e657050903163936f66d27-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> Content-Type: text/plain; charset=ISO-8859-1
>
> > Interesting - put to those uses, I can certainly see how the effects
> > could help focus attention on an important control (shake), or  
> literally
> > add depth to a UI (drawers).
> >
> > Any way you could put up a demo showing those functions in their  
> "native
> > environment"? I know I just don''t have the imagination
to come up
> with
> > that.
>
> Both those examples are adaptations of UI elements in Mac OS X (which
> I too have shamelessly copied in my apps). So for a demo, check out
> Mac OS X (the adaptation to the web will be left for you to imagine).
>
> Without the use of Ajax, those effects might very well be pointless
> and over-the-top, but in an Ajaxified interface, lacking the normal
> browser reload user feedback, as David suggested earlier, those
> effects are absolutely necessary in order to provide a userfriendly
> interface. An ajax implementation _without_ those effects would be
> poor and half-assed.
>
> Regards,
> Tomas Jogin
>
>
> ------------------------------
>
> Message: 6
> Date: Sat, 3 Sep 2005 18:48:24 -0700
> From: Dewey Howell
> Subject: [Rails] validates_uniqueness_of for a group
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
<107869500509031848a55da48-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi
>
> I have 2 questions:
>
> I want to validate that 3 fields together must be unique. e.g -
> first_name, last_name and birth_date.
>
> To ensure 2 fields are unique as a group I can do this:
>
> validates_uniqueness_of :first_name, :scope => "last_name"
>
> 1) How do I add the third term so that all three are checked together?
>
> Just to ensure my question is clear:
>
> ---John Smith DOB 4/4/1970 and John Smith DOB 4/4/1980 would be
> allowed but not if all three fields matched.
>
>
> 2) How do I set it to highlight all three fields but only output one
> message like "First name, last name & birth date must be
unique"
>
> Thanks,
> Dewey
>
>
> ------------------------------
>
> Message: 7
> Date: Sat, 3 Sep 2005 22:57:32 -0300
> From: Carlos Pavia
> Subject: [Rails] Control break in Rails
> To : rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
<7a4512630509031857404a5ff-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> Content-Type: text/plain; charset="iso-8859-1"
>
> What is the best way to implement a control break, in Rails ?
> Suppose we have a table:
>
> CREATE TABLE purchases (
> id int not null auto_increment ,
> card varchar(20) ,
> description varchar(80) ,
> amount decimal(10,2)
> )
>
> with this data
>
> 1, AA, xxxxxxx, 20.45
> 2, BB, xxxxxxx, 3.45
> 3, AA, xxxxxxx, 23.45
> 4, AA, xxxxxxx, 11.22
> 5, BB, xxxxxxx, 91.77
>
>
> and we want to make a report like this:
>
> CARD AA
> description amount
> (...)
> description amount
>
> TOTAL CARD AA: total_card
>
>
> CARD BB
> description amount
> (...)
> description amount
>
> TOTAL CARD BB: total_card
>
> TOTAL PURCHASES: total_purchases
>
>
> Any help would be appreciated !
>
>
> Carlos
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> ------------------------------
>
> Message: 8
> Date: Sat, 3 Sep 2005 19:17:16 -0700
> From: Anon
> Subject: Re: [Rails] Getting a value from datetime_select
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
<9b32a2f50509031917556b8023-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> Content-Type: text/plain; charset="iso-8859-1"
>
> snacktime wrote:
> > I was a little puzzled at this behavior also, and assumed I was  
> probably
> > missing something. My solution was to just create a new datetime  
> object
> out
> > of the elements in the params date hash.
>
> I had this same problem (sent an email to this list with no  
> response). I was
> able to get the date without having to access each element  
> individually.
> Can''t really remember how. (another, unrelated problem I was
having
> was when
> the date was out of range).
>
> I''ll post the code on Tues.
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> ------------------------------
>
> Message: 9
> Date: Sat, 3 Sep 2005 22:18:47 -0400
> From: Nathan Mealey
> Subject: [Rails] Parent-Child Table Relationship Problems
> To: rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> Message-ID:
<058E806E-B0B6-4BBB-A4E5-F00523C056B1-mPKOtHdLgT0QaXB9iyTzyw@public.gmane.org>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello,
>
> I am having trouble getting the UPDATE and CREATE functions to work
> with a table that has a child relationship to a parent table.
>
> The model for the Task table has a child relationship to the table
> Project. This is stipulated in models/task.rb with:  
> belongs_to :project
>
> The model for the Project table has a parent relationship to the
> table Task. This is stipulated in models/project.rb with:
> has_many :tasks
>
> But when I attempt to update or create a new task, I get this error:
> undefined method ` project_id='' for #
>
> The error page points to controllers/task_controller.rb as the source
> of the error, but the MySQL request that it displays includes a value
> for project_id.
>
> What is wrong here? In the tutorials I have seen, they all indicate
> that by stipulating the parent-child relationship in the model files,
> the update and create statements will simply know what to do.
>
> What am I missing?
>
> Thanks in advance,
> Nathan
> -- 
> Nathan Mealey
> Website Manager & Administrative Director
> Cycle-Smart, Inc.
> P.O. Box 1482
> Northampton, MA
> 01061-1482
> nathan-mPKOtHdLgT0QaXB9iyTzyw@public.gmane.org
> (413) 210-7984
> (512) 681-7043 Fax
>
>
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>
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Rails - Sep 2005 - re:Parent-Child Table Relationship Problems (Nathan Mealey)

re:Parent-Child Table Relationship Problems (Nathan Mealey)

re:Parent-Child Table Relationship Problems (Nathan Mealey)