SELECT "u0".*,
	"t1"."vendor_id" AS "technician_manager_vendor_id",
	"t1"."user_id" AS "technician_manager_user_id",
	"t2"."id" AS "technician_id"
FROM "user" AS "u0"
LEFT JOIN "technician_manager" AS "t1" ON "u0"."id" = "t1"."user_id"
LEFT JOIN "technician" AS "t2" ON "u0"."id" = "t2"."user_id"
WHERE NOT (("t1"."technician_manager_vendor_id","t1"."technician_manager_user_id") IS NULL)
ORDER BY "u0"."updated_at" DESC

InvalidFieldNameException: select "u0".*, "t1"."vendor_id" as "technician_manager_vendor_id", "t1"."user_id" as "technician_manager_user_id", "t2"."id" as "technician_id" from "user" as "u0" left join "technician_manager" as "t1" on "u0"."id" = "t1"."user_id" left join "technician" as "t2" on "u0"."id" = "t2"."user_id" where not (("t1"."technician_manager_vendor_id", "t1"."technician_manager_user_id") is null) order by "u0"."updated_at" desc limit 25 - column t1.technician_manager_vendor_id does not exist
        at PostgreSqlExceptionConverter.convertException (/Users/rstimmler/Code/mpx-api-service/node_modules/@mikro-orm/postgresql/PostgreSqlExceptionConverter.js:36:24)
        at PostgreSqlDriver.convertException (/Users/rstimmler/Code/mpx-api-service/node_modules/@mikro-orm/core/drivers/DatabaseDriver.js:192:54)
        at /Users/rstimmler/Code/mpx-api-service/node_modules/@mikro-orm/core/drivers/DatabaseDriver.js:196:24
        at processTicksAndRejections (node:internal/process/task_queues:95:5)
        at async PostgreSqlDriver.find (/Users/rstimmler/Code/mpx-api-service/node_modules/@mikro-orm/knex/AbstractSqlDriver.js:49:24)
        at async SqlEntityManager.find (/Users/rstimmler/Code/mpx-api-service/node_modules/@mikro-orm/core/EntityManager.js:106:25)
        at async UserResolver.usersConnection (/Users/rstimmler/Code/mpx-api-service/src/graphql/resolvers/user.ts:17:23)

@Entity()
export class User extends BaseEntity<User> {
  @OneToOne(() => TechnicianManager, (technician_manager) => technician_manager.user)
  technician_manager: TechnicianManager
}

@Entity()
export class TechnicianManager extends BaseEntityNoId<TechnicianManager, 'vendor' & 'user'> {
  @ManyToOne({ primary: true })
  vendor!: Vendor

  @OneToOne({ primary: true })
  user!: User
}

{
   "$and":[
      {
         "$or":[
            {
               "$not":{
                  "technician_manager":null
               }
            }
         ]
      }
   ]
}