I am fairly new to Rails, and I am having difficulty in forgetting the
old way of developing and using the Rails way.
This is my question, using orders and line_items as an example.
An order has_many line_items
A line_item belongs to order
In my OrdersController I have
def summary
@orders = Orders.find(:all)
render :xml => @orders.to_xml()
end
What I want to achieve is to include a count of line_items per order,
and to include it as say total_line_items in the output.
I don''t know how to a.) get the count per order, b.) how to include in
the output.
Thanks
Andrew
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I haven''t worked with render :xml, so I can''t help with b), though I expect you''ll have to step back and create your xml document manually using REXML or Builder instead of using the to_xml method. to_xml is easy, but limited when you want to add information that is not specifically part of the schema, but Builder is a cinch to use, too, so you won''t have much ramp-up. As to a)... assuming you have an order object in @order, then you can get the count of line_items with: @order.line_items.size Using Builder, you might include this in your xml document with something like: xml.total_line_items @order.line_items.size.to_s Which should result in something like: <total_line_items>72</total_line_items> c. Andrew Cleland wrote:> I am fairly new to Rails, and I am having difficulty in forgetting the > old way of developing and using the Rails way. > > This is my question, using orders and line_items as an example. > An order has_many line_items > A line_item belongs to order > > In my OrdersController I have > > def summary > @orders = Orders.find(:all) > render :xml => @orders.to_xml() > end > > What I want to achieve is to include a count of line_items per order, > and to include it as say total_line_items in the output. > > I don''t know how to a.) get the count per order, b.) how to include in > the output. > > Thanks > > Andrew-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---
Not sure but you''ll probably have to cycle through the orders and count
the line items for each.
@orders.each do {|order| order[''total_line_items''] =
order.line_items.size}
That will create a new attribute on your order objects (but not in the
database) for the number of line items. Hopefully render :xml will know
what to do with it.
Cayce Balara wrote:> I haven''t worked with render :xml, so I can''t help with
b), though I
> expect you''ll have to step back and create your xml document
manually
> using REXML or Builder instead of using the to_xml method. to_xml is
> easy, but limited when you want to add information that is not
> specifically part of the schema, but Builder is a cinch to use, too, so
> you won''t have much ramp-up.
>
> As to a)... assuming you have an order object in @order, then you can
> get the count of line_items with:
>
> @order.line_items.size
>
> Using Builder, you might include this in your xml document with
> something like:
>
> xml.total_line_items @order.line_items.size.to_s
>
> Which should result in something like:
>
> <total_line_items>72</total_line_items>
>
> c.
>
>
> Andrew Cleland wrote:
>> I am fairly new to Rails, and I am having difficulty in forgetting the
>> old way of developing and using the Rails way.
>>
>> This is my question, using orders and line_items as an example.
>> An order has_many line_items
>> A line_item belongs to order
>>
>> In my OrdersController I have
>>
>> def summary
>> @orders = Orders.find(:all)
>> render :xml => @orders.to_xml()
>> end
>>
>> What I want to achieve is to include a count of line_items per order,
>> and to include it as say total_line_items in the output.
>>
>> I don''t know how to a.) get the count per order, b.) how to
include in
>> the output.
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Hi Andrew, Andrew Cleland> What I want to achieve is to include a count of > line_items per order, and to include it as say > total_line_items in the output. > > I don''t know how to a.) get the count per order,I think you''ll find what you need at http://api.rubyonrails.org/ in the methods pane (lower left) under ''count''.> b.) how to include in the output.This will depend on what, exactly, you want the output to look like. to_xml is very limited. Except in very unusual cases, I personally don''t think it''s a great idea to couple an app''s output so tightly to the application''s internal data representation. YMMV. to_xml may or may not give you the flexibility you need. Builder is so incredibly simple to use that it''s definitely worth looking at right from the ''git go'' IMHO. The output you decide on could / probably will have an impact on your decision re: how exactly to approach getting the counts you''re looking for. hth, Bill --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk -~----------~----~----~----~------~----~------~--~---