Hi,
I'm using avro_python3-1.9.2.1 with Python 3. I have a custom record schema
that I would like to include an enum field in, but I get a
SchemaParseException when I do so.
For a minimal test case, using the example from the Python getting started
guide as a complete schema is successful:
schema_txt = """
{ "type": "enum",
"name": "Suit",
"symbols" : ["SPADES", "HEARTS", "DIAMONDS", "CLUBS"]
}
"""
test_schema = avro.schema.parse(schema_txt) # success
However, if I create a record schema with such an enum as a member field (here
the only field, but behaviour is the same with other fields present):
schema_txt = """
{
"name": "Test",
"type": "record",
"fields": [
{ "type": "enum",
"name": "Suit",
"symbols" : ["SPADES", "HEARTS", "DIAMONDS", "CLUBS"]
}
]
}
"""
... then avro.schema.parse() fails with:
Traceback (most recent call last):
File "./simple-schema.py", line 43, in <module>
test_schema = avro.schema.parse(schema_txt)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1244, in
parse
return SchemaFromJSONData(json_data, names)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1215, in
SchemaFromJSONData
return parser(json_data, names=names)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1143, in
_SchemaFromJSONObject
other_props=other_props,
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1022, in
__init__
fields = make_fields(names=nested_names)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1134, in
MakeFields
return tuple(RecordSchema._MakeFieldList(field_desc_list, names))
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 947, in
_MakeFieldList
yield RecordSchema._MakeField(index, field_desc, names)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 918, in
_MakeField
names=names,
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1215, in
SchemaFromJSONData
return parser(json_data, names=names)
File ".../.venv/lib/python3.7/site-packages/avro/schema.py", line 1096, in
_SchemaFromJSONString
% (json_string, sorted(names.names)))
avro.schema.SchemaParseException: Unknown named schema 'enum', known names:
['Test'].
What am I doing wrong?
I've looked through the last six months of the avro users' list archive. The
search function for the list appears to be offline so I haven't dug further
than that. Haven't found anything relevant with web searches either.
Any help appreciated.
Thanks,
Charles
--
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Charles Cazabon <[email protected]>
Software, consulting, and services available at http://pyropus.ca/
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