Support for default values

Default values in schema will populate the model when form is rendered,
but it will not overwrite any existing values.

Author: davidlgj

src/bootstrap-example.html

@@ -70,7 +70,8 @@ <h3>Model</h3>
       },
       "shoesize": {
         "title": "Shoe size",
-        "type": "number"
+        "default": 42,
+        "type": "number",
       },
       "attributes": {
         "type": "object",

src/directives/schema-form.js

@@ -8,6 +8,17 @@ angular.module('schemaForm')
        ['$compile','schemaForm',
 function($compile,  schemaForm){
 
+  //recurse through the entire schema.
+  //FIXME: no support for arrays
+  var traverse = function(schema,fn,path) {
+    path = path || "";
+    fn(schema,path);
+    angular.forEach(schema.properties,function(prop,name){
+      traverse(prop,fn,path===""?name:path+'.'+name);
+    });
+  };
+
+
 
   return {
     scope: {
@@ -45,6 +56,7 @@ function($compile,  schemaForm){
       var lastDigest = {};
 
       scope.$watch(function(){
+
         var schema = scope.schema;
         var form   = scope.initialForm || ['*'];
 
@@ -79,7 +91,18 @@ function($compile,  schemaForm){
           element[0].appendChild(frag);
 
           //compile only children
+
           $compile(element.children())(scope);
+
+
+          //ok, now that that is done let's set any defaults
+          traverse(schema,function(prop,path){
+            //This is probably not so fast, but a simple solution.
+            if (angular.isDefined(prop['default'])) {
+              scope.$eval('model.'+path+' = model.'+path+' || defaltValue',{ defaltValue: prop['default']});
+            }
+          });
+
         }
       });
     }

test/schema-form-test.js

@@ -402,6 +402,45 @@ describe('Schema form',function(){
       });
     });
 
+    it('should honor defaults in schema',function(){
+
+      inject(function($compile,$rootScope){
+        var scope = $rootScope.$new();
+        scope.person = {
+          name: 'Foobar'
+        };
+
+        scope.schema = {
+          "type": "object",
+          "properties": {
+            "name": {
+              "type": "string",
+              "default": "Bar"
+            },
+            "nick": {
+              "type": "string",
+              "default": "Zeb"
+            },
+            "alias": {
+              "type": "string"
+            },
+          }
+        };
+
+        scope.form = ["*"];
+
+        var tmpl = angular.element('<form sf-schema="schema" sf-form="form" sf-model="person"></form>');
+
+        $compile(tmpl)(scope);
+        $rootScope.$apply();
+
+        scope.person.name.should.be.equal('Foobar');
+        scope.person.nick.should.be.equal('Zeb');
+        expect(scope.person.alias).to.be.undefined;
+
+      });
+    });
+
 
 
   });