Nowhere near done yet, but checking in a snapshot of semi-working code. There is some simultaneous support for both with and without use of the Invoice/Receipt account. I want to do away with them completely, but will need to change how sitelink payments are mapped (right now, they split a payment into multiple parts to match the charge).

git-svn-id: file:///svn-source/pmgr/branches/single_AR_20090622/site@181 97e9348a-65ac-dc4b-aefc-98561f571b83

models/ledger.php

@@ -115,6 +115,9 @@ class Ledger extends AppModel {
    *  - Returns summary data from the requested ledger.
    */
   function stats($id, $cond = null) {
+    if (!isset($cond))
+      $cond = array();
+    $cond[] = array('Ledger.id' => $id);
 
     $stats = $this->find
       ('first', array
@@ -138,8 +141,7 @@ class Ledger extends AppModel {
                       ) * IF(LedgerEntry.amount, LedgerEntry.amount, 0)
                    ) AS balance",
 	      "COUNT(LedgerEntry.id) AS entries"),
-	'conditions' => array(isset($cond) ? $cond : array(),
-			      array('Ledger.id' => $id)),
+	'conditions' => $cond,
 	'group' => 'Ledger.id',
 	));