mongoc_collection_keys_to_index_string - Man Page

char *
mongoc_collection_keys_to_index_string (const bson_t *keys);

• keys: A bson_t <https://www.mongoc.org/libbson/current/bson_t.html>. This is expected to match the form of the key field in the createIndexes <https://www.mongodb.com/docs/manual/reference/command/createIndexes/> command.

This function returns the canonical stringification of a given key specification. See Manage Collection Indexes <https://www.mongodb.com/docs/languages/c/c-driver/current/libmongoc/guides/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() <https://www.mongoc.org/libbson/current/bson_free.html>.

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