From e64b40d58bd84aa4daf056e737a8bfeab1346dcf Mon Sep 17 00:00:00 2001
From: James Cole <thegrumpydictator@gmail.com>
Date: Sat, 14 May 2016 22:11:49 +0200
Subject: [PATCH] Experimental query. [skip ci]

---
 .../Account/AccountRepository.php             | 22 +++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/app/Repositories/Account/AccountRepository.php b/app/Repositories/Account/AccountRepository.php
index 169b3fcae1..3ac9824495 100644
--- a/app/Repositories/Account/AccountRepository.php
+++ b/app/Repositories/Account/AccountRepository.php
@@ -13,6 +13,7 @@ use FireflyIII\Models\TransactionJournal;
 use FireflyIII\Models\TransactionType;
 use FireflyIII\User;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Query\Builder;
 use Illuminate\Database\Query\JoinClause;
 use Illuminate\Support\Collection;
 use Log;
@@ -323,8 +324,25 @@ class AccountRepository implements AccountRepositoryInterface
         }
         if ($accounts->count() > 0) {
             $accountIds = $accounts->pluck('id')->toArray();
-            $query->leftJoin('transactions as t', 't.transaction_journal_id', '=', 'transaction_journals.id');
-            $query->whereIn('t.account_id', $accountIds);
+            $query->leftJoin(
+                'transactions as source', function (JoinClause $join) {
+                $join->on('source.transaction_journal_id', '=', 'transaction_journals.id')->where('amount', '<', 0);
+            }
+            );
+            $query->leftJoin(
+                'transactions as destination', function (JoinClause $join) {
+                $join->on('destination.transaction_journal_id', '=', 'transaction_journals.id')->where('amount', '>', 0);
+            }
+            );
+
+            // XOR. must be either.
+            $query->where(
+                function (Builder $query) use ($accountIds) {
+                    $query->whereIn('source.account_id', $accountIds, 'xor')
+                          ->whereIn('destination.account_id', $accountIds, 'xor');
+                }
+            );
+
         }
         // that should do it:
         $complete = $query->get(TransactionJournal::queryFields());