[AVRO-973] Union behavior not consistent

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.6.1, 1.6.2
• Component/s: python
• Labels: patch
• Assignee: Unassigned
• Reporter: Gaurav Nanda
• Created: 11/Dec/11 07:51
• Updated: 22/May/14 21:45

Description

Python's union does not respect the order in which type is specified.

For following schema:

{"type":"map","values":["int","long","float","double","string","boolean"]}

, an integer value is written as double, but it should respect the order in which types have been specified.

Fixed Code (io.py):

def write_union(self, writers_schema, datum, encoder):
"""
A union is encoded by first writing a long value indicating
the zero-based position within the union of the schema of its value.
The value is then encoded per the indicated schema within the union.
"""

1. resolve union
   index_of_schema = -1
   for i, candidate_schema in enumerate(writers_schema.schemas):
   if validate(candidate_schema, datum):
   index_of_schema = i
   break // XXX Add break statement here XXX//
   if index_of_schema < 0: raise AvroTypeException(writers_schema, datum)

Issue Links

• is related to: AVRO-1343 Python: validate too permissive on records with extra fields