adding

Author: matt-sanders

src/index.js

@@ -1,6 +1,6 @@
 import Components from './components/index';
 import Filters from './filters/index';
-import Util,{getTypes, addType, addValidationMessage, set} from './util';
+import Util,{getTypes, addType, addValidationMessage, set, get} from './util';
 import Directives from './directives/index';
 
 
@@ -16,7 +16,8 @@ let Formly = {
     Filters(Vue);
 
     Vue.$formly = {getTypes, addType, addValidationMessage};
-    Vue.prototype.$formlySet = set
+    Vue.prototype.$formlySet = set;
+    Vue.prototype.$formlyGet = get;
   }
 };
 

src/util.js

@@ -38,12 +38,25 @@ export function set(target, key, val){
   }
 }
 
+/**
+ * returns an object value by string
+ * https://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key
+ * @param {Object} target
+ * @param {String} key
+ */
 export function get(target, key){
-  if ( !key in target ){
-    
-  } else {
-    return target[key];
+  key = key.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
+  key = key.replace(/^\./, '');           // strip a leading dot
+  var a = key.split('.');
+  for (var i = 0, n = a.length; i < n; ++i) {
+    var k = a[i];
+    if (k in target) {
+      target = target[k];
+    } else {
+      return;
+    }
   }
+  return target;
 }
 
 /**

test/unit/specs/index.spec.js

@@ -70,6 +70,37 @@ describe('module', () => {
     expect(output).to.be.false;
   });
 
+  describe('get()', () => {
+
+    it('should be present on the Vue instance', () => {
+      const test = new Vue();
+      expect(test.$formlyGet).to.be.a('function');
+    });
+
+    it('should return nested fields', () => {
+      const test = new Vue({
+	data: {
+	  deeply: {
+	    nested: {
+	      child: 'foo',
+	    },
+	    arr: [
+	      {
+		foo: 'bar'
+	      },
+	      {
+		bar: 'foo'
+	      }
+	    ]
+	  }
+	}
+      });
+      expect(test.$formlyGet(test.deeply, 'nested.child')).to.equal('foo');
+      expect(test.$formlyGet(test.deeply, 'arr[1].bar')).to.equal('foo');
+    });
+    
+  });
+
   describe('set()', () => {
 
     it('should be present on the Vue instance', () => {