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PARAMETERS

  • collection: A mongoc_collection_t <>.
  • models: An array of mongoc_index_model_t *.
  • n_models: The number of models.
  • opts: Optional options.
  • reply: A maybe-NULL pointer to overwritable storage <https://www.mongoc.org/libbson/current/lifetimes.html> for a bson_t <https://www.mongoc.org/libbson/current/bson_t.html> to contain the results.
  • error: An optional location for a bson_error_t <> or NULL.

opts may be NULL or a BSON document with additional command options:

  • writeConcern: Construct a mongoc_write_concern_t <> and use mongoc_write_concern_append() <> to add the write concern to opts. See the example code for mongoc_client_write_command_with_opts() <>.
  • sessionId: First, construct a mongoc_client_session_t <> with mongoc_client_start_session() <>. You can begin a transaction with mongoc_client_session_start_transaction() <>, optionally with a mongoc_transaction_opt_t <> that overrides the options inherited from collection, and use mongoc_client_session_append() <> to add the session to opts. See the example code for mongoc_client_session_t <>.
  • collation: Configure textual comparisons. See Setting Collation Order <https://www.mongodb.com/docs/languages/c/c-driver/current/libmongoc/guides/bulk/#setting-collation-order>, and the MongoDB Manual entry on Collation <https://www.mongodb.com/docs/manual/reference/collation/>. Collation requires MongoDB 3.2 or later, otherwise an error is returned.
  • serverId: To target a specific server, include an int32 "serverId" field. Obtain the id by calling mongoc_client_select_server() <>, then mongoc_server_description_id() <> on its return value.

Additional options passed in opts are appended to the createIndexes command. See the MongoDB Manual for createIndexes <https://www.mongodb.com/docs/manual/reference/command/createIndexes/> for all supported options.

If no write concern is provided in opts, the collection's write concern is used.

Each mongoc_index_model_t represents an index to create. mongoc_index_model_new includes:

  • keys Expected to match the form of the key field in the createIndexes <https://www.mongodb.com/docs/manual/reference/command/createIndexes/> command.
  • opts Optional index options appended as a sibling to the key field in the createIndexes <https://www.mongodb.com/docs/manual/reference/command/createIndexes/> command.

This function wraps around the createIndexes <https://www.mongodb.com/docs/manual/reference/command/createIndexes/> command.

Errors are propagated via the error parameter.

Returns true if successful. Returns false and sets error if there are invalid arguments or a server or network error.

See also:

Manage Collection Indexes <https://www.mongodb.com/docs/languages/c/c-driver/current/libmongoc/guides/manage-collection-indexes/>.



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