Mongoose Update Preventor Plugin

1const plugin = function updatePreventor(schema, options) {
2
3  function preUpdate (next){
4    // const update = this.getUpdate()
5    const { _id } = this.getQuery();
6    this.findOne({_id: _id}, function(err, doc){
7      if(err) {
8        return next(new Error('This bannerset is set to be readonly'));
9      }
10      if(doc && doc.frozen) {
11        return next(new Error('This bannerset is set to be readonly'));
12      }
13      return next();
14    });
15  }
16
17  schema.pre('update', preUpdate);
18  schema.pre('findOneAndUpdate', preUpdate);
19}
20
21export default plugin;