Rails - Apr 2006 - Updateform with a has_many relationship ?

Hello all,

I would like to be able to update the "amount" of a certain item in  
me order list.
The problem I run into is how to define the text_field element.

@order is the current order, which has_many :order_item which in turn  
belongs_to :order.

order_item has a field "amount" which should be modified...

What I tried is this below,  but I get a undefined method  
`order_item.amount'' for #<Order:0x2375764>

<%total_price=0%>
<%@order.order_item.each{|item|%>
	<tr
class=<%=cycle(''even'',''odd'')%>>
	<td><%=item.product.name%></td>
	<td><%=text_field
''order'',''order_item.amount'',:size=>3%></td>
	<td><%=item.product.price%></td>
	<td><%=(item.product.price*item.amount)%></td>
	<td><%=image_tag ''delete''%></td>
	<%total_price+=(item.product.price*item.amount)%>
</tr>
<%}%>


With kind regards,

Gerard de Brieder.
Govannon.
web : http://www.govannon.nl
email : info@govannon.nl



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Hi all,

This is certainly a basic one, but I have the same question.

Mickael.


On 4/14/06, Gerard de Brieder <info@govannon.nl>
wrote:
>
> Hello all,
>
> I would like to be able to update the "amount" of a certain item
in me order
> list.
> The problem I run into is how to define the text_field element.
>
> @order is the current order, which has_many :order_item which in turn
> belongs_to :order.
>
> order_item has a field "amount" which should be modified...
>
> What I tried is this below,  but I get a undefined method
> `order_item.amount'' for #<Order:0x2375764>
>
> <%total_price=0%>
> <%@order.order_item.each{|item|%>
>  <tr
class=<%=cycle(''even'',''odd'')%>>
>  <td><%=item.product.name%></td>
>  <td><%=text_field
''order'',''order_item.amount'',:size=>3%></td>
>  <td><%=item.product.price%></td>
>  <td><%=(item.product.price*item.amount)%></td>
>  <td><%=image_tag ''delete''%></td>
>  <%total_price+=(item.product.price*item.amount)%>
> </tr>
> <%}%>
> With kind regards,
> Gerard de Brieder.

Gerard de Brieder wrote:
> Hello all,
> 
> I would like to be able to update the "amount" of a certain item
in
> me order list.
> The problem I run into is how to define the text_field element.
> 
> @order is the current order, which has_many :order_item which in turn
> belongs_to :order.
> 
> order_item has a field "amount" which should be modified...
> 
> What I tried is this below,  but I get a undefined method
> `order_item.amount'' for #<Order:0x2375764>
> 
> <%total_price=0%>
> <%@order.order_item.each{|item|%>
> 	<tr
class=<%=cycle(''even'',''odd'')%>>
> 	<td><%=item.product.name%></td>
> 	<td><%=text_field
''order'',''order_item.amount'',:size=>3%></td>
> 	<td><%=item.product.price%></td>
> 	<td><%=(item.product.price*item.amount)%></td>
> 	<td><%=image_tag ''delete''%></td>
> 	<%total_price+=(item.product.price*item.amount)%>
> </tr>
> <%}%>
> 
> 
> With kind regards,
> 
> Gerard de Brieder.
> Govannon.
> web : http://www.govannon.nl
> email : info@govannon.nl
Are you trying to save the total amount of the order to the order record 
when you submit? If so, then, you should do this:

<% order.amount = 0 %>
<%= start_form_tag ... %>
<% for order_item in @order.order_items %>
 <% your display logic here %>
 <% order.amount += order_item.item.price * order_item.amount %>
<% end %>
<% hidden_field :order, :amount %>
<%= end_form_tag %>

This is untested, but I think it should work. Let me know how it works 
out.

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

Hi Bryan,

I think I can reply for Gerard.
The problem really is in the ''display logic'' you''ve
summarized.

He gets a undefined method
`order_item.amount'' for #<Order:0x2375764>

here:
<td><%=item.product.name%></td>

Mickael.


On 4/17/06, Bryan Duxbury <bryan.duxbury@gmail.com>
wrote:
> Gerard de Brieder wrote:
> > Hello all,
> >
> > I would like to be able to update the "amount" of a certain
item in
> > me order list.
> > The problem I run into is how to define the text_field element.
> >
> > @order is the current order, which has_many :order_item which in turn
> > belongs_to :order.
> >
> > order_item has a field "amount" which should be modified...
> >
> > What I tried is this below,  but I get a undefined method
> > `order_item.amount'' for #<Order:0x2375764>
> >
> > <%total_price=0%>
> > <%@order.order_item.each{|item|%>
> >       <tr
class=<%=cycle(''even'',''odd'')%>>
> >       <td><%=item.product.name%></td>
> >       <td><%=text_field
''order'',''order_item.amount'',:size=>3%></td>
> >       <td><%=item.product.price%></td>
> >       <td><%=(item.product.price*item.amount)%></td>
> >       <td><%=image_tag
''delete''%></td>
> >       <%total_price+=(item.product.price*item.amount)%>
> > </tr>
> > <%}%>
> >
> >
> > With kind regards,
> >
> > Gerard de Brieder.
> > Govannon.
> > web : http://www.govannon.nl
> > email : info@govannon.nl
>
> Are you trying to save the total amount of the order to the order record
> when you submit? If so, then, you should do this:
>
> <% order.amount = 0 %>
> <%= start_form_tag ... %>
> <% for order_item in @order.order_items %>
>  <% your display logic here %>
>  <% order.amount += order_item.item.price * order_item.amount %>
> <% end %>
> <% hidden_field :order, :amount %>
> <%= end_form_tag %>
>
> This is untested, but I think it should work. Let me know how it works
> out.