mongoc_find_and_modify_opts_append man page

mongoc_find_and_modify_opts_append() — Adds arbitrary options to a findAndModify command.

Synopsis

bool
mongoc_find_and_modify_opts_append (mongoc_find_and_modify_opts_t *opts,
                                    const bson_t                  *extra);

Parameters

opts
A mongoc_find_and_modify_opts_t
extra
A bson_t with fields and values to append directly to the findAndModify command sent to the server.

Description

Adds arbitrary options to a findAndModify command.

extra does not have to remain valid after calling this function.

Returns

Returns true on success.

Appending Options to Findandmodify

void fam_opts(mongoc_collection_t *collection)
{
   mongoc_find_and_modify_opts_t *opts;
   bson_t reply;
   bson_t *update;
   bson_error_t error;
   bson_t query = BSON_INITIALIZER;
   bson_t extra = BSON_INITIALIZER;
   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");

   /* Bump his age */
   update = BCON_NEW ("$inc", "{",
      "age", BCON_INT32 (1),
   "}");

   opts = mongoc_find_and_modify_opts_new ();
   mongoc_find_and_modify_opts_set_update (opts, update);

   /* Abort if the operation takes too long. */
   mongoc_find_and_modify_opts_set_max_time_ms (opts, 100);

   /* Some future findAndModify option the driver doesn't support conveniently */
   BSON_APPEND_INT32 (&extra, "futureOption", 42);
   mongoc_find_and_modify_opts_append (opts, &extra);

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

Colophon

This page is part of MongoDB C Driver. Please report any bugs at https://jira.mongodb.org/browse/CDRIVER.

Info

2016‐11‐07 MongoDB C Driver