DOKK / manpages / debian 13 / libmongoc-doc / mongoc_collection_keys_to_index_string.3.en
MONGOC_COLLECTION_KEYS_TO_INDEX_STRING(3) libmongoc MONGOC_COLLECTION_KEYS_TO_INDEX_STRING(3) 

char *
mongoc_collection_keys_to_index_string (const bson_t *keys);


•
keys: A bson_t. This is expected to match the form of the key field in the createIndexes command.

This function returns the canonical stringification of a given key specification. See Manage Collection Indexes for example usage.

It is a programming error to call this function on a non-standard index, such one other than a straight index with ascending and descending.

A string that should be freed with bson_free().

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May 7, 2025 1.30.4