The current GET collections methods do not expose all the filtering that is included in the sqlalchemy interface. The missing filters include [reserved, driver, provision_state, provisioned_before, inspection_started_before] and do exist in the ironic.db.sqlalchemy.api.Connection._add_nodes_filters methods but are not included in the ironic.api.controllers.v1.node.NodesController._get_nodes_collection or related methods. Due to the previous declaration conventions and the api's expose type validation, adding an additional filters optional parameter would mask the expose type validation for the filters and so implementations might be limited to additional optional parameters for each. It would be nice to allow filtering on any/all available fields in the collection and base the type validation on the type defined in the sqlalchemy table declaration.
This changes the API and will need a spec