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jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org

2007-Apr-04 17:37 UTC

Order a find using a has_many association

I''m trying to order a find through a has_many association.  I have a
model called SalesOrder.  Each sales order has things like amount,
description, etc.  I use the following to get the Sales Orders:

@sales_orders = SalesOrder.find(:all)

And I display them with:

<td><%= link_to sales_order.id.to_s, :action =>
''show'', :id =>
sales_order.id %></td>
<td><%= sales_order.sold_to %></td>
<td><%= sales_order.ship_to %></td>
<td><%= (sales_order.rep.length < 1 ? "&nbsp;" :
sales_order.rep) %></
td>
<td><%= sales_order.description %></td>
<td class="right_align"><%= sprintf("%#1.2f",
sales_order.amount) %></
td>
<td><%= sales_order.ship_date.strftime(''%m/%d/%y'')
%></td>
<td><%= sales_order.latest_history.nil? ? "&nbsp;" :
sales_order.latest_history.route.name %></td>

The problem is that this list is not in the order that I need it to
be.  I can order it by any column in the sales_orders table, but I
need to order it by latest_history.route.name  I don''t know how to
order a query based on another table''s column.  Is this even
possible?  Or is there another way to accomplish the same result?  My
model definitions are below:

class SalesOrder < ActiveRecord::Base
   has_many :histories
   has_one  :latest_history,
            :class_name => "History",
            :order => "id desc"
end

class History < ActiveRecord::Base
   belongs_to :route
   belongs_to :sales_order
end

class Route < ActiveRecord::Base
  has_many :histories
  has_and_belongs_to_many :users

end


Thanks!


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Dutch Rapley

2007-Apr-04 17:44 UTC

head link

Re: Order a find using a has_many association

you might want to try this

@sales_orders = SalesOrder.find(:all, :include => [:histories, :routes],
:order => "routes.name")

-Dutch

On 4/4/07, jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org
<jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org>
wrote:>
>
> I''m trying to order a find through a has_many association.  I have
a
> model called SalesOrder.  Each sales order has things like amount,
> description, etc.  I use the following to get the Sales Orders:
>
> @sales_orders = SalesOrder.find(:all)
>
> And I display them with:
>
> <td><%= link_to sales_order.id.to_s, :action =>
''show'', :id =>
> sales_order.id %></td>
> <td><%= sales_order.sold_to %></td>
> <td><%= sales_order.ship_to %></td>
> <td><%= (sales_order.rep.length < 1 ? "&nbsp;" :
sales_order.rep) %></
> td>
> <td><%= sales_order.description %></td>
> <td class="right_align"><%= sprintf("%#1.2f",
sales_order.amount) %></
> td>
> <td><%=
sales_order.ship_date.strftime(''%m/%d/%y'') %></td>
> <td><%= sales_order.latest_history.nil? ? "&nbsp;" :
> sales_order.latest_history.route.name %></td>
>
> The problem is that this list is not in the order that I need it to
> be.  I can order it by any column in the sales_orders table, but I
> need to order it by latest_history.route.name  I don''t know how to
> order a query based on another table''s column.  Is this even
> possible?  Or is there another way to accomplish the same result?  My
> model definitions are below:
>
> class SalesOrder < ActiveRecord::Base
>    has_many :histories
>    has_one  :latest_history,
>             :class_name => "History",
>             :order => "id desc"
> end
>
> class History < ActiveRecord::Base
>    belongs_to :route
>    belongs_to :sales_order
> end
>
> class Route < ActiveRecord::Base
>   has_many :histories
>   has_and_belongs_to_many :users
>
> end
>
>
> Thanks!
>
>
> >
>
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jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org

2007-Apr-04 18:20 UTC

head link

Re: Order a find using a has_many association

Ok,

I added the following to my SalesOrder model:

has_many :routes, :through => :histories

Then I tried:

@sales_orders = SalesOrder.find(:all, :include =>
[:histories, :routes], :order => ''routes.name'')

That partially worked.  It seemed to group together all sales orders
where the route wasn''t blank.  But they weren''t all grouped
together
by the same status.  Here''s the order of the routes they were in:

Production Control
Application Data Sheet Approval
Manufacturing Engineering
Released to Shop
Manufacturing Engineering
Manufacturing Engineering
Manufacturing Engineering
Manufacturing Engineering
Project Engineering
Released to Shop

Why weren''t the Manufacturing Engineering and Released to Shop routes
all together?

Thanks!






On Apr 4, 12:44 pm, "Dutch Rapley"
<dutch.rap...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> you might want to try this
>
> @sales_orders = SalesOrder.find(:all, :include => [:histories, :routes],
> :order => "routes.name")
>
> -Dutch
>
> On 4/4/07, jfl...-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org
<jfl...-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org> wrote:
>
>
>
> > I''m trying to order a find through a has_many association.  I
have a
> > model called SalesOrder.  Each sales order has things like amount,
> > description, etc.  I use the following to get the Sales Orders:
>
> > @sales_orders = SalesOrder.find(:all)
>
> > And I display them with:
>
> > <td><%= link_to sales_order.id.to_s, :action =>
''show'', :id =>
> > sales_order.id %></td>
> > <td><%= sales_order.sold_to %></td>
> > <td><%= sales_order.ship_to %></td>
> > <td><%= (sales_order.rep.length < 1 ?
"&nbsp;" : sales_order.rep) %></
> > td>
> > <td><%= sales_order.description %></td>
> > <td class="right_align"><%=
sprintf("%#1.2f", sales_order.amount) %></
> > td>
> > <td><%=
sales_order.ship_date.strftime(''%m/%d/%y'') %></td>
> > <td><%= sales_order.latest_history.nil? ?
"&nbsp;" :
> > sales_order.latest_history.route.name %></td>
>
> > The problem is that this list is not in the order that I need it to
> > be.  I can order it by any column in the sales_orders table, but I
> > need to order it by latest_history.route.name  I don''t know
how to
> > order a query based on another table''s column.  Is this even
> > possible?  Or is there another way to accomplish the same result?  My
> > model definitions are below:
>
> > class SalesOrder < ActiveRecord::Base
> >    has_many :histories
> >    has_one  :latest_history,
> >             :class_name => "History",
> >             :order => "id desc"
> > end
>
> > class History < ActiveRecord::Base
> >    belongs_to :route
> >    belongs_to :sales_order
> > end
>
> > class Route < ActiveRecord::Base
> >   has_many :histories
> >   has_and_belongs_to_many :users
>
> > end
>
> > Thanks!

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Dutch Rapley

2007-Apr-04 20:17 UTC

head link

Re: Order a find using a has_many association

ah, I''m assuming you want to group sub items together, would you mind
reponding back with you view code?

On 4/4/07, jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org
<jfloyd-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org>
wrote:>
>
> Ok,
>
> I added the following to my SalesOrder model:
>
> has_many :routes, :through => :histories
>
> Then I tried:
>
> @sales_orders = SalesOrder.find(:all, :include =>
> [:histories, :routes], :order => ''routes.name'')
>
> That partially worked.  It seemed to group together all sales orders
> where the route wasn''t blank.  But they weren''t all
grouped together
> by the same status.  Here''s the order of the routes they were in:
>
> Production Control
> Application Data Sheet Approval
> Manufacturing Engineering
> Released to Shop
> Manufacturing Engineering
> Manufacturing Engineering
> Manufacturing Engineering
> Manufacturing Engineering
> Project Engineering
> Released to Shop
>
> Why weren''t the Manufacturing Engineering and Released to Shop
routes
> all together?
>
> Thanks!
>
>
>
>
>
>
> On Apr 4, 12:44 pm, "Dutch Rapley"
<dutch.rap...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > you might want to try this
> >
> > @sales_orders = SalesOrder.find(:all, :include => [:histories,
:routes],
> > :order => "routes.name")
> >
> > -Dutch
> >
> > On 4/4/07, jfl...-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org
<jfl...-9RPjh6LLLbEOPmVbiNFCMNBPR1lH4CV8@public.gmane.org> wrote:
> >
> >
> >
> > > I''m trying to order a find through a has_many
association.  I have a
> > > model called SalesOrder.  Each sales order has things like
amount,
> > > description, etc.  I use the following to get the Sales Orders:
> >
> > > @sales_orders = SalesOrder.find(:all)
> >
> > > And I display them with:
> >
> > > <td><%= link_to sales_order.id.to_s, :action =>
''show'', :id =>
> > > sales_order.id %></td>
> > > <td><%= sales_order.sold_to %></td>
> > > <td><%= sales_order.ship_to %></td>
> > > <td><%= (sales_order.rep.length < 1 ?
"&nbsp;" : sales_order.rep) %></
> > > td>
> > > <td><%= sales_order.description %></td>
> > > <td class="right_align"><%=
sprintf("%#1.2f", sales_order.amount) %></
> > > td>
> > > <td><%=
sales_order.ship_date.strftime(''%m/%d/%y'') %></td>
> > > <td><%= sales_order.latest_history.nil? ?
"&nbsp;" :
> > > sales_order.latest_history.route.name %></td>
> >
> > > The problem is that this list is not in the order that I need it
to
> > > be.  I can order it by any column in the sales_orders table, but
I
> > > need to order it by latest_history.route.name  I don''t
know how to
> > > order a query based on another table''s column.  Is this
even
> > > possible?  Or is there another way to accomplish the same result?
My
> > > model definitions are below:
> >
> > > class SalesOrder < ActiveRecord::Base
> > >    has_many :histories
> > >    has_one  :latest_history,
> > >             :class_name => "History",
> > >             :order => "id desc"
> > > end
> >
> > > class History < ActiveRecord::Base
> > >    belongs_to :route
> > >    belongs_to :sales_order
> > > end
> >
> > > class Route < ActiveRecord::Base
> > >   has_many :histories
> > >   has_and_belongs_to_many :users
> >
> > > end
> >
> > > Thanks!
>
>
> >
>
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Jason

2007-Apr-04 20:47 UTC

head link

Re: Order a find using a has_many association

Here you go:

<% for sales_order in @sales_orders %>


  <tr>

    <td><%= sales_order.sold_to %></td>
    <td><%= sales_order.ship_to %></td>
    <td><%= sales_order.description %></td>
    <td><%= sprintf("%#1.2f", sales_order.amount)
%></td>
    <td><%=
sales_order.ship_date.strftime(''%m/%d/%y'') %></td>

    <!-- this is the column of the table that''s not sorting right
-->
    <td><%= sales_order.latest_history.nil? ? "&nbsp;" : 
sales_order.latest_history.route.name %></td>


  </tr>

-- 
Posted via http://www.ruby-forum.com/.

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