Rails - Dec 2007 - Updating HABTM records is easy, but why isn’t one_to_many ?

Updating HABTM records is easy, but why isn’t one_to_many (has_many and
belongs_to)?

With the collection_select it is easy to update HABTM records, everthing
is taken care of, besides declar-ing the variable for all records in de
related tabel. But updating more than one record from a belongs_to table
seems to need a lot of more coding. Or am I missing something?

Models:
class Event < ActiveRecord::Base
  has_many :evtimes
end

class Evtime < ActiveRecord::Base
  belongs_to :event
end

In EventsController.rb
  def edit
    @event = Event.find(params[:id])
    @evtimes = Evtime.find(:all, :conditions => ["event_id = ?",
@event.id])
  end

  def update
    @event = Event.find(params[:id])
    @evtimes = Evtime.find(params[:evtimes])
    @event << @evtimes
    if @event.update_attributes(params[:event])
      flash[:notice] = ''Event was successfully updated.''
      redirect_to :action => ''show'', :id => @event
    else
      render :action => ''edit''
    end
  end

And in _form.rhtml
<%= error_messages_for ''event'' %>

<!--[form:event]-->
<p><label for="event_name">Name</label><br/>
<%= text_field ''event'', ''name'' 
%></p>

<p><label for="event_city">City</label><br/>
<%= text_field ''event'', ''city'' 
%></p>

<p><label
for="event_description">Description</label><br/>
<%= text_field ''event'', ''description'' 
%></p>

<br/>
<% for evtime in @evtimes do %>
  Starting :<%= time_select ''evtime'',
''starting'' %><br/>
  Ending :<%= time_select ''evtime'',
''ending'' %><br/>
  Action: <%= text_field ''evtime'',
''movement''%><br/>
  Notes:<br/> <%= text_area ''evtime'',
''notes'' %><br/>
<% end %>
<!--[eoform:event]-->

I’ve tried a lot of combinations, but nothing went the right way.
Please help, I’m starting to become a Rubyist, but this kind of problems
keep diappointing me.

Thanks,
Adrie
-- 
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What is evtime? You didn''t explain this at all in your code.

Is it event time? Why is it being stored in a separate table?

On Dec 17, 2007 7:09 AM, Adrie Donker
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
> Updating HABTM records is easy, but why isn''t one_to_many
(has_many and
> belongs_to)?
>
> With the collection_select it is easy to update HABTM records, everthing
> is taken care of, besides declar-ing the variable for all records in de
> related tabel. But updating more than one record from a belongs_to table
> seems to need a lot of more coding. Or am I missing something?
>
> Models:
> class Event < ActiveRecord::Base
>  has_many :evtimes
> end
>
> class Evtime < ActiveRecord::Base
>  belongs_to :event
> end
>
> In EventsController.rb
>  def edit
>    @event = Event.find(params[:id])
>    @evtimes = Evtime.find(:all, :conditions => ["event_id =
?",
> @event.id])
>  end
>
>  def update
>    @event = Event.find(params[:id])
>    @evtimes = Evtime.find(params[:evtimes])
>    @event << @evtimes
>    if @event.update_attributes(params[:event])
>      flash[:notice] = ''Event was successfully updated.''
>      redirect_to :action => ''show'', :id => @event
>    else
>      render :action => ''edit''
>    end
>  end
>
> And in _form.rhtml
> <%= error_messages_for ''event'' %>
>
> <!--[form:event]-->
> <p><label
for="event_name">Name</label><br/>
> <%= text_field ''event'', ''name'' 
%></p>
>
> <p><label
for="event_city">City</label><br/>
> <%= text_field ''event'', ''city'' 
%></p>
>
> <p><label
for="event_description">Description</label><br/>
> <%= text_field ''event'',
''description''  %></p>
>
> <br/>
> <% for evtime in @evtimes do %>
>  Starting :<%= time_select ''evtime'',
''starting'' %><br/>
>  Ending :<%= time_select ''evtime'',
''ending'' %><br/>
>  Action: <%= text_field ''evtime'',
''movement''%><br/>
>  Notes:<br/> <%= text_area ''evtime'',
''notes'' %><br/>
> <% end %>
> <!--[eoform:event]-->
>
> I''ve tried a lot of combinations, but nothing went the right way.
> Please help, I''m starting to become a Rubyist, but this kind of
problems
> keep diappointing me.
>
> Thanks,
> Adrie
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net

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Ryan Bigg wrote:
> What is evtime? You didn''t explain this at all in your code.
> 
> Is it event time? Why is it being stored in a separate table?
> 
> On Dec 17, 2007 7:09 AM, Adrie Donker
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
> 
>> class Event < ActiveRecord::Base
>>    @evtimes = Evtime.find(:all, :conditions => ["event_id =
?",
>>    else
>>
>>  Action: <%= text_field ''evtime'',
''movement''%><br/>
>> --
Ryan, thanks for your reply,

Evtime is short for eventtimes. I want to be able to update 
eventtimes(Evtime records) on the same page as the related Event (Event 
record). My problem is (was?) that i can''t get the event.evtimes 
updateable. But i haven''t stop searching and found this. I did not yet 
try it.

<% @event.evtimes.each do |@evtime| %>
  Starting :<%= time_select "evtime[]", "evtime_starting"
%><br/>
  Ending :<%= time_select "evtime[]", "evtime_ending"
%><br/>
  Action: <%= text_field "evtime[]", "evtime_movement"
%><br/>
  Notes:<br/> <%= text_area "evtime[]",
"evtime_notes" %><br/>
<% end %>

Adrie
-- 
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On 12/16/07, Adrie Donker
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Updating HABTM records is easy, but why isn''t one_to_many
(has_many and
> belongs_to)?
>
> With the collection_select it is easy to update HABTM records, everthing
> is taken care of, besides declar-ing the variable for all records in de
> related tabel. But updating more than one record from a belongs_to table
> seems to need a lot of more coding. Or am I missing something?
You''re working too hard.

> Models:
> class Event < ActiveRecord::Base
>   has_many :evtimes
> end
The has many lets you get at and manipulate the list of Evtimes from the Event.
> class Evtime < ActiveRecord::Base
>   belongs_to :event
> end
>
> In EventsController.rb
>   def edit
>     @event = Event.find(params[:id])
       @evtimes = Event.evtimes
>   end
>
>   def update
>     @event = Event.find(params[:id])
       @event.evtimes << Evtime.find(params[:evtimes])
>     if @event.update_attributes(params[:event])
>       flash[:notice] = ''Event was successfully updated.''
>       redirect_to :action => ''show'', :id => @event
>     else
>       render :action => ''edit''
>     end
>   end
>
> And in _form.rhtml
> <%= error_messages_for ''event'' %>
>
> <!--[form:event]-->
> <p><label
for="event_name">Name</label><br/>
> <%= text_field ''event'', ''name'' 
%></p>
>
> <p><label
for="event_city">City</label><br/>
> <%= text_field ''event'', ''city'' 
%></p>
>
> <p><label
for="event_description">Description</label><br/>
> <%= text_field ''event'',
''description''  %></p>
>
> <br/>
> <% for evtime in @evtimes do %>
>   Starting :<%= time_select ''evtime'',
''starting'' %><br/>
>   Ending :<%= time_select ''evtime'',
''ending'' %><br/>
>   Action: <%= text_field ''evtime'',
''movement''%><br/>
>   Notes:<br/> <%= text_area ''evtime'',
''notes'' %><br/>
> <% end %>
> <!--[eoform:event]-->
There are better ways to do the view, e.g. using the  form_for helper
and using a partial for the Evtimes list, but that''s another story.
You also need to handle the fact that you are editing multiple
Evtimes. For that I''d direct you to RailsCasts episodes 73-75
http://railscasts.com/episodes;archive
-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/

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my question is that why would you have multiple event times? Why not just
store the time/date of the event on the event itself?

On Dec 19, 2007 8:19 AM, Rick DeNatale
<rick.denatale-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> On 12/16/07, Adrie Donker
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
> > Updating HABTM records is easy, but why isn''t one_to_many
(has_many and
> > belongs_to)?
> >
> > With the collection_select it is easy to update HABTM records,
everthing
> > is taken care of, besides declar-ing the variable for all records in
de
> > related tabel. But updating more than one record from a belongs_to
table
> > seems to need a lot of more coding. Or am I missing something?
>
> You''re working too hard.
>
>
> > Models:
> > class Event < ActiveRecord::Base
> >   has_many :evtimes
> > end
>
> The has many lets you get at and manipulate the list of Evtimes from the
> Event.
>
> > class Evtime < ActiveRecord::Base
> >   belongs_to :event
> > end
> >
> > In EventsController.rb
> >   def edit
> >     @event = Event.find(params[:id])
>       @evtimes = Event.evtimes
> >   end
> >
> >   def update
> >     @event = Event.find(params[:id])
>       @event.evtimes << Evtime.find(params[:evtimes])
>
> >     if @event.update_attributes(params[:event])
> >       flash[:notice] = ''Event was successfully
updated.''
> >       redirect_to :action => ''show'', :id =>
@event
> >     else
> >       render :action => ''edit''
> >     end
> >   end
> >
> > And in _form.rhtml
> > <%= error_messages_for ''event'' %>
> >
> > <!--[form:event]-->
> > <p><label
for="event_name">Name</label><br/>
> > <%= text_field ''event'', ''name'' 
%></p>
> >
> > <p><label
for="event_city">City</label><br/>
> > <%= text_field ''event'', ''city'' 
%></p>
> >
> > <p><label
for="event_description">Description</label><br/>
> > <%= text_field ''event'',
''description''  %></p>
> >
> > <br/>
> > <% for evtime in @evtimes do %>
> >   Starting :<%= time_select ''evtime'',
''starting'' %><br/>
> >   Ending :<%= time_select ''evtime'',
''ending'' %><br/>
> >   Action: <%= text_field ''evtime'',
''movement''%><br/>
> >   Notes:<br/> <%= text_area ''evtime'',
''notes'' %><br/>
> > <% end %>
> > <!--[eoform:event]-->
>
> There are better ways to do the view, e.g. using the  form_for helper
> and using a partial for the Evtimes list, but that''s another
story.
> You also need to handle the fact that you are editing multiple
> Evtimes. For that I''d direct you to RailsCasts episodes 73-75
> http://railscasts.com/episodes;archive
> --
> Rick DeNatale
>
> My blog on Ruby
> http://talklikeaduck.denhaven2.com/
>
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net

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On 12/18/07, Ryan Bigg
<radarlistener-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> my question is that why would you have multiple event times? Why not just
> store the time/date of the event on the event itself?
Who is to say that his Events are one-time only.  He wasn''t asking
about a domain question.

It would be nice, by the way if you stopped top-posting.

A. Because it makes the conversation hard to follow.

Q. Why shouldn''t you top post?


-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/

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My apologies.

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Rick,

Very much thanks, that''s the code i was looking for.
It''s still not easy to switch to Ruby with a 25 year RPG-background.

Thanks and have a beautiful Christmas,
Adrie Donker
Netherlands
-- 
Posted via http://www.ruby-forum.com/.

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