How do I update Object with Spring Data and MongoDB? - spring

Question

How do I update Object with Spring Data and MongoDB?
do I just do a template.save()?
public Person update( String id, String Name )
{
logger.debug("Retrieving an existing person");
// Find an entry where pid matches the id
Query query = new Query(where("pid").is(id));
// Execute the query and find one matching entry
Person person = mongoTemplate.findOne("mycollection", query, Person.class);
person.setName(name);
/**
* How do I update the database
*/
return person;
}

Answer 1

If you read the javadoc for MongoOperations/MongoTemplate you will see that
save()
performs an:
upsert()
So yes you can just update your object and call save.

Answer 2

You could probably do both 'find' and 'update' operations in one line.
mongoTemplate.updateFirst(query,Update.update("Name", name),Person.class)
You can find some excellent tutorials at
Spring Data MongoDB Helloworld

Answer 3

You can just use template.save() or repository.save(entity) methods for this. But mongo has also Update object for this operations.
For example:
Update update=new Update();
update.set("fieldName",value);
mongoTemplate.update**(query,update,entityClass);

Answer 4

Below code is the equivalent implementation using MongoTemplate for update operation.
public Person update(Person person){
Query query = new Query();
query.addCriteria(Criteria.where("id").is(person.getId()));
Update update = new Update();
update.set("name", person.getName());
update.set("description", person.getDescription());
return mongoTemplate.findAndModify(query, update, Person.class);
}