make sure that we include comments for aliased proeprties

Author: domoritz

Diff for: test/programs/type-aliases/main.ts

@@ -1,11 +1,26 @@
+/**
+ * My string
+ */
 type MyString = string;
 
+/**
+ * My type alias
+ */
+type MyAlias = MySubObject;
+
+/**
+ * My sub object
+ */
 interface MySubObject {
     propA: number;
     propB: number;
 }
 
+/**
+ * My Object
+ */
 interface MyObject {
     primitive: MyString;
     object: MySubObject;
+    alias: MyAlias;
 }

Diff for: test/programs/type-aliases/schema.json

@@ -1,10 +1,16 @@
 {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "definitions": {
+        "MyAlias": {
+            "$ref": "#/definitions/MySubObject",
+            "description": "My sub object"
+        },
         "MyString": {
+            "description": "My string",
             "type": "string"
         },
         "MySubObject": {
+            "description": "My sub object",
             "properties": {
                 "propA": {
                     "type": "number"
@@ -13,14 +19,18 @@
                     "type": "number"
                 }
             },
-            "type": "object",
             "required": [
                 "propA",
                 "propB"
-            ]
+            ],
+            "type": "object"
         }
     },
+    "description": "My Object",
     "properties": {
+        "alias": {
+            "$ref": "#/definitions/MyAlias"
+        },
         "object": {
             "$ref": "#/definitions/MySubObject"
         },
@@ -30,7 +40,8 @@
     },
     "required": [
         "primitive",
-        "object"
+        "object",
+        "alias"
     ],
     "type": "object"
-}
+}

Diff for: typescript-json-schema.ts

@@ -615,9 +615,7 @@ export class JsonSchemaGenerator {
         // if it will be a $ref and it is not yet created
         if (!asRef || !this.reffedDefinitions[fullTypeName]) {
             if (asRef) { // must be here to prevent recursivity problems
-                this.reffedDefinitions[fullTypeName] = this.args.useTypeAliasRef && symbol && reffedType && reffedType.getFlags() & ts.TypeFlags.IndexedAccess ? {
-                    "$ref": "#/definitions/" + symbol.getName()
-                } : definition;
+                this.reffedDefinitions[fullTypeName] = asTypeAliasRef && reffedType.getFlags() & ts.TypeFlags.IndexedAccess && symbol ? this.getTypeDefinition(typ, tc, true, undefined, symbol, symbol) : definition;
                 if (this.args.useTitle && fullTypeName) {
                     definition.title = fullTypeName;
                 }