fix(abstract-query): properly hash primaryKey for buffers (#8174)

lib/dialects/abstract/query.js

@@ -479,6 +479,7 @@ class AbstractQuery {
 
       return uniqueKeyAttributes;
     };
+    const stringify = obj => obj instanceof Buffer ? obj.toString('hex') : obj;
     let primaryKeyAttributes;
     let uniqueKeyAttributes;
     let prefix;
@@ -499,11 +500,11 @@ class AbstractQuery {
         $length = includeOptions.model.primaryKeyAttributes.length;
         topHash = '';
         if ($length === 1) {
-          topHash = row[includeOptions.model.primaryKeyAttributes[0]];
+          topHash = stringify(row[includeOptions.model.primaryKeyAttributes[0]]);
         }
         else if ($length > 1) {
           for ($i = 0; $i < $length; $i++) {
-            topHash += row[includeOptions.model.primaryKeyAttributes[$i]];
+            topHash += stringify(row[includeOptions.model.primaryKeyAttributes[$i]]);
           }
         }
         else if (!_.isEmpty(includeOptions.model.uniqueKeys)) {
@@ -551,11 +552,11 @@ class AbstractQuery {
                 $length = primaryKeyAttributes.length;
                 itemHash = prefix;
                 if ($length === 1) {
-                  itemHash += row[prefix+'.'+primaryKeyAttributes[0]];
+                  itemHash += stringify(row[prefix+'.'+primaryKeyAttributes[0]]);
                 }
                 else if ($length > 1) {
                   for ($i = 0; $i < $length; $i++) {
-                    itemHash += row[prefix+'.'+primaryKeyAttributes[$i]];
+                    itemHash += stringify(row[prefix+'.'+primaryKeyAttributes[$i]]);
                   }
                 }
                 else if (!_.isEmpty(includeMap[prefix].model.uniqueKeys)) {
@@ -640,11 +641,11 @@ class AbstractQuery {
             $length = primaryKeyAttributes.length;
             itemHash = prefix;
             if ($length === 1) {
-              itemHash += row[prefix+'.'+primaryKeyAttributes[0]];
+              itemHash += stringify(row[prefix+'.'+primaryKeyAttributes[0]]);
             }
             else if ($length > 0) {
               for ($i = 0; $i < $length; $i++) {
-                itemHash += row[prefix+'.'+primaryKeyAttributes[$i]];
+                itemHash += stringify(row[prefix+'.'+primaryKeyAttributes[$i]]);
               }
             }
             else if (!_.isEmpty(includeMap[prefix].model.uniqueKeys)) {