mongoc_collection_keys_to_index_string − mongoc_collection_keys_to_index_string()
char * mongoc_collection_keys_to_index_string (const bson_t *keys) BSON_GNUC_WARN_UNUSED_RESULT;
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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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