Remove items from array of documents in Spring+Mongo

Question

I have a collection of documents like this in a mongo db :

\"_id\" : ObjectId(\"592bc37c339e7a23788b4c7c\"),
\"trips\" : [ 
    {
        \"tripGcsId\" : \"5937f         


        

Answer 1

You need to use $pull update operator which takes the query to match and delete all the matching rows in embedded array.

Something like

public List<String> removeTripObject( List<String> tripIds ) {
    Query query = Query.query( Criteria.where( "tripGcsId" ).in( tripIds ) );
    Update update = new Update().pull("trips", query );
    getMongoTemplate().updateMulti( new Query(), update, "ORDER" );
    return updatedOrders;
}

Reference

https://docs.mongodb.com/manual/reference/operator/update/pull/#remove-items-from-an-array-of-documents