mongodb: .save() method does not set _id column value

[encobrain]

Issue type:

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

Database system/driver:

[ ] cordova
[x] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[ ] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

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

Steps to reproduce or a small repository showing the problem:

@Entity()
class EntityClass {
    @ObjectIdColumn()
    _id: ObjectId;

    @Column()
    name: string;
}

let ent = new EntityClass();
ent.name = "abc";

await connection.mongoManager.save(ent);

console.log(ent._id); // inserts new document but does not set _id. _id is undefined

[pleerock]

@rustamwin

[rustamwin]

I guess this problem related to 8f25eec
probably we need check objectIdColumn name?

[vlapo]

Sry guys. I did not realize possibility of property name _id. Fix is coming in next release.