4.0 changelog

4.0.0a1

• Support for Bolt Protocol 3.0

• Support for Bolt Protocol 4.0 (Connection Layer Only)

• Added a Bookmark class

• Bookmarks are changed from a String to Bookmark object.

• Added driver.verify_connectivity() method.

• Exceptions Changes:

  • Removed ConnectionExpired
  • Renamed neo4j.exceptions.CypherError to neo4j.exceptions.Neo4jError
  • Introduced Driver API class hierarchy with Neo4jError and DriverError
  • (Internal API) Introduced Connection API class hierarchy with BoltError (Please raise an issue on github if these surface to the user.)
  • Improved connection failure error message information.
  • Connecting to unsupported Bolt Protocol will raise an error explaining the supported versions available for the driver.

• Removed transaction.success flag

  The pattern is no longer valid for a transaction object, tx:

  tx = begin()
  # DO STUFF
  tx.success = True
  tx.close()
  

  Use the pattern instead:

  tx = begin()
  # DO STUFF
  tx.commit()