#542: + _prepareGroup

Sortable.js

@@ -145,7 +145,23 @@
 					}
 				}
 			}
-		}, 30)
+		}, 30),
+
+		_prepareGroup = function (options) {
+			var group = options.group;
+
+			if (!group || typeof group != 'object') {
+				group = options.group = {name: group};
+			}
+
+			['pull', 'put'].forEach(function (key) {
+				if (!(key in group)) {
+					group[key] = true;
+				}
+			});
+
+			options.groups = ' ' + group.name + (group.put.join ? ' ' + group.put.join(' ') : '') + ' ';
+		}
 	;
 
 
@@ -197,22 +213,7 @@
 			!(name in options) && (options[name] = defaults[name]);
 		}
 
-		var group = options.group;
-
-		if (!group || typeof group != 'object') {
-			group = options.group = { name: group };
-		}
-
-
-		['pull', 'put'].forEach(function (key) {
-			if (!(key in group)) {
-				group[key] = true;
-			}
-		});
-
-
-		options.groups = ' ' + group.name + (group.put.join ? ' ' + group.put.join(' ') : '') + ' ';
-
+		_prepareGroup(options);
 
 		// Bind all private methods
 		for (var fn in this) {
@@ -906,6 +907,10 @@
 				return options[name];
 			} else {
 				options[name] = value;
+
+				if (name === 'group') {
+					_prepareGroup(options);
+				}
 			}
 		},