C++ (Cpp) mongoc_collection_ensure_index примеры использования

Пример #1

Файл: test-mongoc-collection.c Проект: glee314/mongo-c-driver

static void
test_index (void)
{
   mongoc_collection_t *collection;
   mongoc_client_t *client;
   mongoc_index_opt_t opt;
   bson_error_t error;
   bool r;
   bson_t keys;

   mongoc_index_opt_init(&opt);

   client = mongoc_client_new(gTestUri);
   ASSERT (client);

   collection = mongoc_client_get_collection(client, "test", "test");
   ASSERT (collection);

   bson_init(&keys);
   bson_append_int32(&keys, "hello", -1, 1);
   r = mongoc_collection_ensure_index(collection, &keys, &opt, &error);
   ASSERT (r);

   r = mongoc_collection_ensure_index(collection, &keys, &opt, &error);
   ASSERT (r);

   r = mongoc_collection_drop_index(collection, "hello_1", &error);
   ASSERT (r);

   bson_destroy(&keys);

   mongoc_collection_destroy(collection);
   mongoc_client_destroy(client);
}

Пример #2

Файл: mongoc-gridfs.c Проект: watsonsong/mongo-c-driver

/**
 * _mongoc_gridfs_ensure_index:
 *
 * ensure gridfs indexes
 *
 * Ensure fast searches for chunks via [ files_id, n ]
 * Ensure fast searches for files via [ filename ]
 */
static bool
_mongoc_gridfs_ensure_index (mongoc_gridfs_t *gridfs,
                             bson_error_t    *error)
{
   bson_t keys;
   mongoc_index_opt_t opt;
   bool r;

   ENTRY;

   bson_init (&keys);

   bson_append_int32 (&keys, "files_id", -1, 1);
   bson_append_int32 (&keys, "n", -1, 1);

   mongoc_index_opt_init (&opt);
   opt.unique = 1;

   r = mongoc_collection_ensure_index (gridfs->chunks, &keys, &opt, error);

   bson_destroy (&keys);

   if (!r) { RETURN (r); }

   bson_init (&keys);

   bson_append_int32 (&keys, "filename", -1, 1);
   opt.unique = 0;

   r = mongoc_collection_ensure_index (gridfs->chunks, &keys, &opt, error);

   bson_destroy (&keys);

   if (!r) { RETURN (r); }

   RETURN (1);
}