Fix the default length for strings to avoid row size overflow

lib/mysql.js

@@ -1027,11 +1027,11 @@ function stringOptionsByType(p, dt) {
     case 'varchar':
       // The maximum length for an ID column is 1000 bytes
       // The maximum row size is 64K
-      var len = p.limit || ((p.type !== String) ? 8192 : p.id ? 255: 1024);
+      var len = p.length || p.limit || ((p.type !== String) ? 4096 : p.id ? 255: 512);
       dt += '(' + len + ')';
       break;
     case 'char':
-      len = p.limit || 255;
+      len = p.length || p.limit || 255;
       dt += '(' + len + ')';
       break;
 

test/migration.test.js

@@ -26,14 +26,14 @@ describe('migrations', function () {
           Extra: 'auto_increment' },
         email: {
           Field: 'email',
-          Type: 'varchar(1024)',
+          Type: 'varchar(512)',
           Null: 'NO',
           Key: 'MUL',
           Default: null,
           Extra: '' },
         name: {
           Field: 'name',
-          Type: 'varchar(1024)',
+          Type: 'varchar(512)',
           Null: 'YES',
           Key: '',
           Default: null,