SYNOPSIS

          bool
          mongoc_find_and_modify_opts_set_flags (
             mongoc_find_and_modify_opts_t *opts,
             const mongoc_find_and_modify_flags_t flags);

PARAMETERS

       • opts: A mongoc_find_and_modify_opts_t.

       • flags: .

DESCRIPTION

       Adds one or more flags to the builder.

                      ┌──────────────────────────────────┬───────────────────────────────────────┐
                      │MONGOC_FIND_AND_MODIFY_NONE       │ Default.  Doesn't add anything to the │
                      │                                  │ builder.                              │
                      ├──────────────────────────────────┼───────────────────────────────────────┤
                      │MONGOC_FIND_AND_MODIFY_REMOVE     │ Will  instruct   find_and_modify   to │
                      │                                  │ remove the matching document.         │
                      ├──────────────────────────────────┼───────────────────────────────────────┤
                      │MONGOC_FIND_AND_MODIFY_UPSERT     │ Update  the  matching document or, if │
                      │                                  │ no  document  matches,   insert   the │
                      │                                  │ document.                             │
                      ├──────────────────────────────────┼───────────────────────────────────────┤
                      │MONGOC_FIND_AND_MODIFY_RETURN_NEW │ Return the resulting document.        │
                      └──────────────────────────────────┴───────────────────────────────────────┘

RETURNS

       Returns  Returns  true  if  it  successfully added the option to the builder, otherwise false and logs an
       error.

SETTING FLAGS

       flags.c

          void
          fam_flags (mongoc_collection_t *collection)
          {
             mongoc_find_and_modify_opts_t *opts;
             bson_t reply;
             bson_error_t error;
             bson_t query = BSON_INITIALIZER;
             bson_t *update;
             bool success;

             /* Find Zlatan Ibrahimovic, the striker */
             BSON_APPEND_UTF8 (&query, "firstname", "Zlatan");
             BSON_APPEND_UTF8 (&query, "lastname", "Ibrahimovic");
             BSON_APPEND_UTF8 (&query, "profession", "Football player");
             BSON_APPEND_INT32 (&query, "age", 34);
             BSON_APPEND_INT32 (
                &query, "goals", (16 + 35 + 23 + 57 + 16 + 14 + 28 + 84) + (1 + 6 + 62));

             /* Add his football position */
             update = BCON_NEW ("$set", "{", "position", BCON_UTF8 ("striker"), "}");

             opts = mongoc_find_and_modify_opts_new ();

             mongoc_find_and_modify_opts_set_update (opts, update);

             /* Create the document if it didn't exist, and return the updated document */
             mongoc_find_and_modify_opts_set_flags (
                opts, MONGOC_FIND_AND_MODIFY_UPSERT | MONGOC_FIND_AND_MODIFY_RETURN_NEW);

             success = mongoc_collection_find_and_modify_with_opts (
                collection, &query, opts, &reply, &error);

             if (success) {
                char *str;

                str = bson_as_canonical_extended_json (&reply, NULL);
                printf ("%s\n", str);
                bson_free (str);
             } else {
                fprintf (
                   stderr, "Got error: \"%s\" on line %d\n", error.message, __LINE__);
             }

             bson_destroy (&reply);
             bson_destroy (update);
             bson_destroy (&query);
             mongoc_find_and_modify_opts_destroy (opts);
          }

       Outputs:

          {
             "lastErrorObject" : {
                "updatedExisting" : false,
                "n" : 1,
                "upserted" : {"$oid" : "56562a99d13e6d86239c7b00"}
             },
                                 "value" : {
                                    "_id" : {"$oid" : "56562a99d13e6d86239c7b00"},
                                    "age" : 34,
                                    "firstname" : "Zlatan",
                                    "goals" : 342,
                                    "lastname" : "Ibrahimovic",
                                    "profession" : "Football player",
                                    "position" : "striker"
                                 },
                                           "ok" : 1
          }

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2017-present, MongoDB, Inc