Update operation adds in a new array instead of adding array elements - mongodb

Question

My controller:
#RequestMapping(value = "/{id}/giveFacilitiesAccess", method = RequestMethod.POST)
public Object giveFacilityAccessToAnotherUser(#PathVariable("id") String userId)
{
return userService.giveFacilitiesAccessToAnotherUser(userId);
}
My service:
#Override
public Object giveFacilitiesAccessToAnotherUser(String id)
{
String userId = getLoggedInUserId();
User u = userDao.findById(userId);
List<String> facilitiesAccess = u.getFacilitiesAccess();
return userDao.giveFacilitiesAccessToAnotherUser(id,facilitiesAccess);
}
My dao:
#Override
public Object giveFacilitiesAccessToAnotherUser(String userId, List<String>facilitiesAccess)
{
Query query = new Query();
query.addCriteria(Criteria.where("id").is(userId));
Update update = new Update().addToSet("facilitiesAccess.",facilitiesAccess);
mongoTemplate.updateFirst(query, update, User.class);
return null;
}
After updating:
"facilitiesAccess":["5f0996f792691d1b68671da3",["5f0998ba92691d1b68671da4"]]
It's updating like array inside another array, but i need in this format:
"facilitiesAccess":["5f0996f792691d1b68671da3","5f0998ba92691d1b68671da4"]

Answer 1

The update works with the syntax using the addToSet(String key) which returns a Update.AddToSetBuilder - then apply the each(Object... values) method on the builder, to return the Update object.
Update update = new Update().addToSet("facilitiesAccess").each(facilitiesAccess);

Answer 2

You need to use Each like below
#Override
public Object giveFacilitiesAccessToAnotherUser(String userId, List<String>facilitiesAccess)
{
Query query = new Query();
query.addCriteria(Criteria.where("id").is(userId));
Update update = new Update().addToSet("facilitiesAccess.",new Each(facilitiesAccess));
mongoTemplate.updateFirst(query, update, User.class);
return null;
}