NAME¶

SYNOPSIS¶

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

NOTE

PARAMETERS¶

opts

A mongoc_find_and_modify_opts_t

flags

DESCRIPTION¶

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¶

SETTING FLAGS¶

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_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
}

COLOPHON¶