From 1bae8a806218c5c68c7eb8ab801b5675fd4fe732 Mon Sep 17 00:00:00 2001
From: Vincent Giersch <vincent@giersch.fr>
Date: Thu, 18 Apr 2013 13:19:59 +0200
Subject: [PATCH 1/2] Handle undefined when altering tables

---
 lib/mysql.js | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/lib/mysql.js b/lib/mysql.js
index b7253c9..335f4dd 100644
--- a/lib/mysql.js
+++ b/lib/mysql.js
@@ -403,11 +403,13 @@ MySQL.prototype.alterTable = function (model, actualFields, actualIndexes, done,
     propNames.forEach(function (propName) {
         if (propName === 'id') return;
         var found;
-        actualFields.forEach(function (f) {
-            if (f.Field === propName) {
-                found = f;
-            }
-        });
+        if (actualIndexes) {
+            actualFields.forEach(function (f) {
+                if (f.Field === propName) {
+                    found = f;
+                }
+            });
+        }
 
         if (found) {
             actualize(propName, found);
@@ -417,13 +419,15 @@ MySQL.prototype.alterTable = function (model, actualFields, actualIndexes, done,
     });
 
     // drop columns
-    actualFields.forEach(function (f) {
-        var notFound = !~propNames.indexOf(f.Field);
-        if (f.Field === 'id') return;
-        if (notFound || !m.properties[f.Field]) {
-            sql.push('DROP COLUMN `' + f.Field + '`');
-        }
-    });
+    if (actualFields) {
+        actualFields.forEach(function (f) {
+            var notFound = !~propNames.indexOf(f.Field);
+            if (f.Field === 'id') return;
+            if (notFound || !m.properties[f.Field]) {
+                sql.push('DROP COLUMN `' + f.Field + '`');
+            }
+        });
+    }
 
     // remove indexes
     aiNames.forEach(function (indexName) {

From fa617dc35fa25570a8871ff03f47cc3f905d3d52 Mon Sep 17 00:00:00 2001
From: Vincent Giersch <vincent@giersch.fr>
Date: Thu, 18 Apr 2013 15:57:56 +0200
Subject: [PATCH 2/2] Mistake in an undefined check

---
 lib/mysql.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mysql.js b/lib/mysql.js
index 335f4dd..c34c026 100644
--- a/lib/mysql.js
+++ b/lib/mysql.js
@@ -403,7 +403,7 @@ MySQL.prototype.alterTable = function (model, actualFields, actualIndexes, done,
     propNames.forEach(function (propName) {
         if (propName === 'id') return;
         var found;
-        if (actualIndexes) {
+        if (actualFields) {
             actualFields.forEach(function (f) {
                 if (f.Field === propName) {
                     found = f;