implemented changelog

src/models/note_field.ts

@@ -1,8 +1,15 @@
 import mongoose from 'mongoose';
+import db from '../db';
 
 const NoteFieldSchema = new mongoose.Schema({
   name: {type: String, index: {unique: true}},
   qty: Number
 });
 
-export default mongoose.model('note_field', NoteFieldSchema);
+// changelog query helper
+NoteFieldSchema.query.log = function <Q extends mongoose.DocumentQuery<any, any>> (req) {
+  db.log(req, this);
+  return this;
+}
+
+export default mongoose.model<any, mongoose.Model<any, any>>('note_field', NoteFieldSchema);