Let schema-validate export a valdateField function

So that arrays and others can trigger it when needed.

Author: davidlgj

src/directives/schema-validate.js

@@ -39,7 +39,7 @@ angular.module('schemaForm').directive('schemaValidate', ['sfValidator', '$parse
             if (!form) {
               return viewValue;
             }
-
+            
             // Omit TV4 validation
             if (scope.options && scope.options.tv4Validation === false) {
               return viewValue;
@@ -103,12 +103,23 @@ angular.module('schemaForm').directive('schemaValidate', ['sfValidator', '$parse
           if (ngModel.$validators) {
             ngModel.$validators.schemaForm = function() {
               // Any error and we're out of here!
-              return !Object.keys(ngModel.$error).some(function(e) { return e !== 'schemaForm'});
-            }
+              return !Object.keys(ngModel.$error).some(function(e) { return e !== 'schemaForm';});
+            };
           }
 
-          // Listen to an event so we can validate the input on request
-          scope.$on('schemaFormValidate', function() {
+          var schema = form.schema;
+
+          // A bit ugly but useful.
+          scope.validateField =  function() {
+
+            // Special case: arrays
+            // TODO: Can this be generalized in a way that works consistently?
+            // Just setting the viewValue isn't enough to trigger validation
+            // since it's the same value. This will be better when we drop
+            // 1.2 support.
+            if (schema && schema.type.indexOf('array') !== -1) {
+              validate(ngModel.$modelValue);
+            }
 
             // We set the viewValue to trigger parsers,
             // since modelValue might be empty and validating just that
@@ -132,8 +143,10 @@ angular.module('schemaForm').directive('schemaValidate', ['sfValidator', '$parse
               // hence required works.
               ngModel.$setViewValue(ngModel.$viewValue);
             }
+          }
 
-          });
+          // Listen to an event so we can validate the input on request
+          scope.$on('schemaFormValidate', scope.validateField);
 
           scope.schemaError = function() {
             return error;