Mongoose Plugins

1const plugin = function updateOnPlugin(schema: any, options: any) {
2  // Add new property to Schema
3  schema.add({ updatedOn: Date });
4  schema.add({ createdOn: Date });
5
6  // Pre Hook
7  schema.pre('save', function (next: any) {
8    if (!this.isModified()) {
9      return next();
10    }
11    this.updatedOn = new Date;
12    if (!this.createdOn) {
13      this.createdOn = new Date;
14    }
15    next();
16  });
17
18  // Index
19  if (options && options.index) {
20    schema.path('updatedOn').index(options.index);
21  }
22};
23export default plugin;