Listener not invoked when relation loaded through getter

[BrettHoutz]

Issue type:

[ ] question
[X ] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[X ] mysql / mariadb
[ ] oracle
[ ] postgres
[ ] sqlite
[ ] sqljs
[ ] websql

TypeORM version:

[X ] latest
[ ] @next
[ ] 0.x.x (or put your version here)

When loading an entity's relation through a getter function, the listener @AfterLoad is never invoked. To demonstrate this issue, i first modified the TypeScript example by adding a listener to Category.

/* src/entity/Category.ts */

@AfterLoad()
printMessage() {
    console.log("AfterLoad invoked for", this.name);
}

/* src/index.ts */

let post = await connection.manager.findOne(Post, {relations: ["categories"]});
console.log("Found post:", post);

The listener is invoked as expected:

AfterLoad invoked for TypeScript
AfterLoad invoked for Programming
Found post: Post {
  id: 1,
  title: 'Control flow based type analysis',
  text: 'TypeScript 2.0 implements a control flow-based type analysis for local variables and parameters.',
  categories: 
   [ Category { id: 1, name: 'TypeScript' },
     Category { id: 2, name: 'Programming' } ] }

Then, i changed Post to use a setter/getter for categories.

/* src/entity/Post.ts */

@ManyToMany(type => Category)
@JoinTable()
get categories() {
    return this._categories;
}
set categories(arr) {
    if(uniqBy(arr, "name").length != arr.length) throw "Duplicate categories found";
    this._categories = arr;
}
private _categories: Category[];

After this change, the listeners are not invoked:

Found post: Post {
  id: 1,
  title: 'Control flow based type analysis',
  text: 'TypeScript 2.0 implements a control flow-based type analysis for local variables and parameters.',
  _categories: 
   [ Category { id: 1, name: 'TypeScript' },
     Category { id: 2, name: 'Programming' } ] }

[pleerock]

This was a bug, fixed and will be released in 0.1.17