How to insert object into collection if it doesn't exist using mongo-jackson-mapper?

Asked Jul 03 '12 at 10:43

Active Jul 03 '12 at 11:08

Viewed 778 times

I can't find an API for this simple operation. What I need to do is insert a new document if it doesn't exist already, so I'm trying to use "upsert":

JacksonDBCollection<User, String> collection = 
    JacksonDBCollection.wrap(database.getCollection("users"), 
            User.class, String.class);
collection.ensureIndex("email");
collection.update(DBQuery.in("email", user.email),
    <what should I put here?>, true, false);

The object I need to insert is "user", but update() signature accepts only DBQuery instance.

Thanks, Michael

asked Jul 03 '12 at 10:43

Michael Spector

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did you see the code in this link: https://github.com/vznet/mongo-jackson-mapper/commit/7726bf2a4973c36dc4986333f81d6f4476775451 – Asya Kamsky Jul 03 '12 at 16:28
@AsyaKamsky this code only updates one of object fields. What I need is to insert a **new** document if it doesn't exist. – Michael Spector Jul 03 '12 at 17:24
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it updates that field or inserts the document with that field set if the document doesn't exist. That's what the upsert flag does. – Asya Kamsky Jul 03 '12 at 21:49
@AsyaKamsky, so I have to count all existing fields of the object into DBObject, or there some syntactic sugar for that? – Michael Spector Jul 04 '12 at 07:38
I'm not sure what you mean by "to count" so can't really say, sorry. – Asya Kamsky Jul 05 '12 at 19:19

How to insert object into collection if it doesn't exist using mongo-jackson-mapper?

0 Answers0