"default" keyword in "items" subschemas, #42

lib/dot/items.jst

@@ -43,7 +43,16 @@ var {{=$valid}};
     {{# def.elseIfValid}}
   {{?}}
 
+  {{ var $useDefaults = it.opts.useDefaults && !it.compositeRule; }}
+
   {{~ $schema:$sch:$i }}
+    {{ var $passData = $data + '[' + $i + ']'; }}
+
+    {{? $useDefaults && $sch.default !== undefined }}
+      if ({{=$passData}} === undefined)
+        {{=$passData}} = {{= it.useDefault($sch.default) }};
+    {{?}}
+
     {{? {{# def.nonEmptySchema:$sch }} }}
       valid{{=$it.level}} = true;
 
@@ -53,7 +62,6 @@ var {{=$valid}};
           $it.schemaPath = $schemaPath + '[' + $i + ']';
           $it.errSchemaPath = $errSchemaPath + '/' + $i;
           $it.errorPath = it.util.getPathExpr(it.errorPath, $i, it.opts.jsonPointers, true);
-          var $passData = $data + '[' + $i + ']';
           if (it.opts.v5) $it.dataPathArr[$dataNxt] = $i;
         }}
 

spec/options.spec.js

@@ -360,12 +360,7 @@ describe('Ajv Options', function () {
         var validate = ajv.compile(schema);
 
         var data = {};
-        try {
         validate(data) .should.equal(true);
-        } catch(e) {
-          console.log('failed with:', ajv.opts);
-          throw e;
-        }
         data. should.eql({ foo: 'abc', bar: 1, baz: false, nil: null, obj: {}, arr:[] });
 
         var data = { foo: 'foo', bar: 2, obj: { test: true } };
@@ -373,5 +368,35 @@ describe('Ajv Options', function () {
         data. should.eql({ foo: 'foo', bar: 2, baz: false, nil: null, obj: { test: true }, arr:[] });
       }
     });
+
+    it('should replace undefined item with default value', function() {
+      test(Ajv({ useDefaults: true }));
+      test(Ajv({ useDefaults: true, allErrors: true }));
+
+      function test(ajv) {
+        var schema = {
+          items: [
+            { type: 'string', default: 'abc' },
+            { type: 'number', default: 1 },
+            { type: 'boolean' }
+          ]
+        };
+
+        var validate = ajv.compile(schema);
+
+        var data = [];
+        validate(data) .should.equal(true);
+        data. should.eql([ 'abc', 1 ]);
+
+        var data = [,,true];
+        validate(data) .should.equal(true);
+        data. should.eql([ 'abc', 1, true ]);
+
+        var data = ['foo',,'false'];
+        validate(data) .should.equal(false);
+        validate.errors .should.have.length(1);
+        data. should.eql([ 'foo', 1, 'false' ]);
+      }
+    });
   });
 });