fix(resetModel): Updated resetModel to set the form to pristine

Updated the resetModel function to set call  on the form as well as the fields

#574

Author: tuckerjt07

src/directives/formly-field.js

@@ -197,6 +197,10 @@ function formlyField($http, $q, $compile, $templateCache, $interpolate, formlyCo
           resetFormControl($scope.options.formControl)
         }
       }
+      if ($scope.form) {
+        $scope.form.$setUntouched && $scope.form.$setUntouched()
+        $scope.form.$setPristine()
+      }
     }
 
     function resetFormControl(formControl, isMultiNgModel) {

src/directives/formly-field.test.js

@@ -1309,7 +1309,6 @@ describe('formly-field', function() {
       // initial state
       expect(field.formControl.$dirty).to.be.false
       expect(field.formControl.$touched).to.be.false
-
       // modification
       scope.model.foo = '~=[,,_,,]:3'
       field.formControl.$setTouched()
@@ -1427,6 +1426,43 @@ describe('formly-field', function() {
       expect(() => field.resetModel()).to.not.throw()
     })
 
+    it('should reset the form state on the input and form both', () => {
+      const field = getNewField({key: 'foo'})
+      scope.fields = [field]
+      compileAndDigest(`
+<form name="theForm">
+<formly-form form="theForm" model="model" fields="fields" options="options"></formly-form>
+</form>
+`)
+      // initial state
+      expect(field.formControl.$dirty).to.be.false
+      expect(field.formControl.$touched).to.be.false
+      expect(scope.theForm.$dirty).to.be.false
+      expect(scope.theForm.$pristine).to.be.true
+      // modification
+      scope.model.foo = '~=[,,_,,]:3'
+      field.formControl.$setTouched()
+      field.formControl.$setDirty()
+      scope.$digest()
+
+      // expect modification
+      expect(field.formControl.$dirty).to.be.true
+      expect(field.formControl.$touched).to.be.true
+      expect(scope.theForm.$dirty).to.be.true
+      expect(scope.theForm.$pristine).to.be.false
+      expect(field.formControl.$modelValue).to.eq('~=[,,_,,]:3')
+
+      // reset state
+      field.resetModel()
+
+      // expect reset
+      expect(field.formControl.$modelValue).to.be.empty
+      expect(field.formControl.$touched).to.be.false
+      expect(field.formControl.$dirty).to.be.false
+      expect(scope.theForm.$dirty).to.be.false
+      expect(scope.theForm.$pristine).to.be.true
+    })
+
     it(`should not digest if there's a digest in progress`, () => {
       scope.fields = [getNewField()]
       compileAndDigest()