NAME

       mongoc_collection_command_simple()  -  This  is  a simplified version of mongoc_collection_command() that
       returns the first result document in reply. The parameter reply  is  initialized  even  upon  failure  to
       simplify memory management.

SYNOPSIS

       bool
       mongoc_collection_command_simple (mongoc_collection_t       *collection,
                                         const bson_t              *command,
                                         const mongoc_read_prefs_t *read_prefs,
                                         bson_t                    *reply,
                                         bson_error_t              *error);

PARAMETERS

       collection
              A mongoc_collection_t \&.

       command
              A bson_t containing the command to execute.

       read_prefs
              A mongoc_read_prefs_t or NULL \&.

       reply  A location to initialize a bson_t \&. This should be on the stack.

       error  An optional location for a bson_error_t or NULL \&.

DESCRIPTION

       This  is  a  simplified version of mongoc_collection_command(3) that returns the first result document in
       reply \&. The parameter reply is initialized even upon failure to simplify memory management.

       This function tries to unwrap an embedded error in the command when possible. The unwrapped error will be
       propagated via the error parameter. Additionally, the result document is set in reply \&.

ERRORS

       Errors are propagated via the error parameter.

RETURNS

       true if successful, otherwise false \&.

       Not all commands have truly succeeded  when  {ok:1.0}  is  returned.  This  could  simply  mean  the  RPC
       successfully was executed.

EXAMPLE

       The following is an example of executing the collection stats command.

       #include <mongoc.h>
       #include <bcon.h>
       #include <stdio.h>

       static void
       print_collection_stats (mongoc_collection_t *collection)
       {
          bson_error_t error;
          const char *name;
          bson_t *cmd;
          bson_t reply;

          name = mongoc_collection_get_name (collection);
          cmd = BCON_NEW ("collStats", BCON_UTF8 (name));

          if (mongoc_collection_command_simple (collection, cmd, NULL, &reply, &error)) {
             str = bson_as_json (&reply, NULL);
             printf ("%s\n", str);
             bson_free (str);
          } else {
             fprintf (stderr, "%s\n", error.message);
          }

          bson_destroy (&reply);
          bson_destroy (cmd);
       }

COLOPHON

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

MongoDB C Driver                                   2016‐01‐18                MONGOC_COLLECTION_COMMAND_SIMPLE(3)