[added] deep path support for from

Author: jquense

package.json

@@ -65,7 +65,7 @@
   "dependencies": {
     "case": "^1.2.1",
     "fn-name": "~1.0.1",
-    "lodash": "^4.13.1",
+    "lodash": "^4.17.0",
     "property-expr": "^1.2.0",
     "toposort": "^0.2.10",
     "type-name": "^2.0.1",

src/object.js

@@ -4,6 +4,7 @@ import snakeCase from 'lodash/snakeCase';
 import camelCase from 'lodash/camelCase';
 import mapKeys from 'lodash/mapKeys';
 import transform from 'lodash/transform';
+import { getter } from 'property-expr';
 
 import MixedSchema from './mixed';
 import { object as locale } from './locale.js';
@@ -192,18 +193,17 @@ inherits(ObjectSchema, MixedSchema, {
   },
 
   from(from, to, alias) {
+    let fromGetter = getter(from, true);
+
     return this.transform(obj => {
       var newObj = obj;
 
       if (obj == null)
         return obj
 
       if (has(obj, from)) {
-        newObj = omit(obj, from);
-        newObj[to] = obj[from]
-
-        if (alias)
-          newObj[from] = obj[from]
+        newObj = alias ? { ...obj } : omit(obj, from);
+        newObj[to] = fromGetter(obj)
       }
 
       return newObj