Created
October 2, 2009 20:36
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class PurchaseOrder | |
include DataMapper::Resource | |
storage_names[:default] = ... | |
property :id, Serial, :field => 'purchaseorderindex' | |
... | |
property :closed_date, Date, :field => 'closeddate' | |
... | |
has n, :items, :model => 'PurchaseOrderLineItem', :child_key => [:po_id, Integer], :deleted => false | |
end | |
class PurchaseOrderLineItem | |
include DataMapper::Resource | |
before :destroy, :check_receiving | |
storage_names[:default] = 'poitem' | |
property :id, Serial, :field => 'poitemindex' | |
property :cb3_id, Integer, :field => 'codebook3index' | |
property :po_id, Integer, :field => 'purchaseorderindex' | |
... | |
property :deleted, Boolean, :default => false, :field => 'deleteflag' | |
belongs_to :po, :model => 'PurchaseOrder', :child_key => [:po_id, Integer] | |
... | |
end | |
I want to get the lasted *purchased* PurchaseOrderLineItem which has the cb3_id = xxxx. | |
1. purchased - the closed purchase order | |
2. latest - has to be ordered by purchaseOrder closed_date.desc | |
3. I want the line item(not the order) which is specified by cb3_id | |
Here is the query(which is simplified): | |
PurchaseOrder.first(:completed => 'yes', :order => [:closed_date.desc], 'items.cb3_id' => 17633333).items.first(:cb3_id => 1763333) | |
I have to do the second cb3_id against the items, because that order might have several line items. | |
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