Fixed #19.

Author: pluma

README.md

@@ -2534,10 +2534,12 @@ db.createGraph({
 });
 ```
 
-#### graphEdgeCollection.save(data, fromId, toId, callback)
+#### graphEdgeCollection.save(data, [fromId, toId, ]callback)
 
 Creates a new edge between the vertices *fromId* and *toId* with the given *data*.
 
+If *fromId* and *toId* are not specified, the *data* needs to contain the properties *_from* and *_to*.
+
 *Examples*
 
 ```js

dist/arango.all.js

@@ -1303,6 +1303,13 @@ extend(EdgeCollection.prototype, {
         });
     },
     save: function (data, fromId, toId, callback) {
+        if (typeof fromId === 'function') {
+            callback = fromId;
+            fromId = undefined;
+        } else {
+            data._from = fromId;
+            data._to = toId;
+        }
         if (!callback)
             callback = noop;
         this._gharial.post(data, {

dist/arango.all.min.js

@@ -1303,6 +1303,13 @@ extend(EdgeCollection.prototype, {
         });
     },
     save: function (data, fromId, toId, callback) {
+        if (typeof fromId === 'function') {
+            callback = fromId;
+            fromId = undefined;
+        } else {
+            data._from = fromId;
+            data._to = toId;
+        }
         if (!callback)
             callback = noop;
         this._gharial.post(data, {

dist/arango.js

@@ -126,6 +126,13 @@ extend(EdgeCollection.prototype, {
     });
   },
   save: function (data, fromId, toId, callback) {
+    if (typeof fromId === 'function') {
+      callback = fromId;
+      fromId = undefined;
+    } else {
+      data._from = fromId;
+      data._to = toId;
+    }
     if (!callback) callback = noop;
     this._gharial.post(data, {
       collection: this.name,