models: move Checkpoint LDL def into a json file

common/models/checkpoint.js

@@ -2,27 +2,7 @@
  * Module Dependencies.
  */
 
-var PersistedModel = require('../../lib/loopback').PersistedModel
-  , loopback = require('../../lib/loopback')
-  , assert = require('assert');
-
-/**
- * Properties
- */
-
-var properties = {
-  seq: {type: Number},
-  time: {type: Date, default: Date},
-  sourceId: {type: String}
-};
-
-/**
- * Options
- */
-
-var options = {
-
-};
+var assert = require('assert');
 
 /**
  * Checkpoint list entry.
@@ -31,11 +11,17 @@ var options = {
  * @property time {Number} the time when the checkpoint was created
  * @property sourceId {String}  the source identifier
  *
- * @class
+ * @class Checkpoint
  * @inherits {PersistedModel}
  */
 
-var Checkpoint = module.exports = PersistedModel.extend('Checkpoint', properties, options);
+module.exports = function(Checkpoint) {
+
+  // Workaround for https://github.com/strongloop/loopback/issues/292
+  Checkpoint.definition.rawProperties.time.default =
+    Checkpoint.definition.properties.time.default = function() {
+      return new Date();
+    };
 
   /**
    * Get the current checkpoint id
@@ -74,4 +60,4 @@ Checkpoint.beforeSave = function(next, model) {
       next();
     }
   }
-
+};

common/models/checkpoint.json

@@ -0,0 +1,14 @@
+{
+  "name": "Checkpoint",
+  "properties": {
+    "seq": {
+      "type": "number"
+    },
+    "time": {
+      "type": "date"
+    },
+    "sourceId": {
+      "type": "string"
+    }
+  }
+}

lib/builtin-models.js

@@ -34,7 +34,10 @@ module.exports = function(loopback) {
     require('../common/models/user.js'));
 
   loopback.Change = require('../common/models/change');
-  loopback.Checkpoint = require('../common/models/checkpoint');
+
+  loopback.Checkpoint = createModel(
+    require('../common/models/checkpoint.json'),
+    require('../common/models/checkpoint.js'));
 
   /*!
    * Automatically attach these models to dataSources