set up orders model and relationships

common/models/order.json

@@ -0,0 +1,38 @@
+{
+  "name": "order",
+  "plural": "orders",
+  "base": "PersistedModel",
+  "idInjection": true,
+  "options": {
+    "validateUpsert": true
+  },
+  "properties": {
+    "id": {
+      "type": "string",
+      "required": true
+    },
+    "total": {
+      "type": "number",
+      "required": true
+    },
+    "datetime": {
+      "type": "date"
+    }
+  },
+  "validations": [],
+  "relations": {
+    "customer": {
+      "type": "belongsTo",
+      "model": "customer",
+      "foreignKey": ""
+    },
+    "products": {
+      "type": "hasMany",
+      "model": "product",
+      "foreignKey": "",
+      "through": "orderProducts"
+    }
+  },
+  "acls": [],
+  "methods": {}
+}