select option in mongodb

[wujunyucg]

Issue type:

[x] question
[ ] 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:
I saw there is select option in repository.find() or repository.findAndCount functions .

/**   

     * Specifies what columns should be retrieved.  

     */   

    select?: (keyof Entity)[];

But it did not work. And in the code , it did not process this option.

const query = this.convertFindManyOptionsOrConditionsToMongodbQuery(optionsOrConditions);  

        const cursor = await this.createEntityCursor(entityClassOrName, query);  

        if (FindOptionsUtils.isFindManyOptions(optionsOrConditions)) {  

            if (optionsOrConditions.skip)  

                cursor.skip(optionsOrConditions.skip);  

            if (optionsOrConditions.take)  

                cursor.limit(optionsOrConditions.take);  

            if (optionsOrConditions.order)  

                cursor.sort(this.convertFindOptionsOrderToOrderCriteria(optionsOrConditions.order));  

        }  

        return cursor.toArray();```

[vlapo]

Already on roadmap #1929

[wujunyucg]

thanks