OneOf serialization doesn't work when it is a child of a multitype.

[joesolly]

Describe the bug OneOf serialization doesn't work when it is a child of a multitype.

Example Schema and code

"$schema": "http://json-schema.org/draft-07/schema",
  "title": "myschema",
  "type": "object",
  "definitions": {
    "MainObject": {
      "title": "MainObject",
      "additionalProperties": false,
      "type": "object",
      "properties": {
        "location": {
          "title": "location",
          "type": ["object", "string"],
          "oneOf": [
            {
              "$ref": "#/definitions/UNIQUE_STRING"
            },
            {
              "$ref": "#/definitions/Location"
            }
          ]
        }
      }
    },
    "Location": {
      "title": "Location",
      "description": "A Location represents a span on a specific sequence.",
      "type": "object",
      "oneOf": [
        {
          "$ref": "#/definitions/Location1"
        },
        {
          "$ref": "#/definitions/Location2"
        }
      ],
      "discriminator": {
        "propertyName": "type"
      }
    },
    "Location1": {
      "additionalProperties": false,
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Location1"],
          "default": "Location1"
        }
      }
    },
    "Location2": {
      "additionalProperties": false,
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Location2"],
          "default": "Location2"
        }
      }
    },
    "UNIQUE_STRING": {
      "additionalProperties": false,
      "type": "string",
      "pattern": "^\\w[^:]*:.+$",
    }
  }
}
>>> import python_jsonschema_objects as pjs
>>> builder = pjs.ObjectBuilder(examples['myschema'])
>>> ns = builder.build_classes()
>>> MainObject = ns.MainObject(**{'location': {'type': 'location2'}})

Expected behavior I expect this to succeed. Instead I get an error stack trace like this:

venv/3.8/lib/python3.8/site-packages/python_jsonschema_objects/classbuilder.py:200: in __init__
    setattr(self, prop, props[prop])
venv/3.8/lib/python3.8/site-packages/python_jsonschema_objects/classbuilder.py:228: in __setattr__
    prop.__set__(self, val)
venv/3.8/lib/python3.8/site-packages/python_jsonschema_objects/descriptors.py:47: in __set__
    if isinstance(val, typ):
E   TypeError: isinstance() arg 2 must be a type or tuple of types

[joesolly]

This was not an issue in 0.3.10 but has been an issue in 0.3.11, 0.3.12, 0.3.13, and 0.3.14.

[cwacek]

Hmm. Sounds like a regression. I’m pretty sure there’s no nested oneOf test case so that’s not surprising.

I’ll try and take a look this weekend

On May 6, 2021, at 11:51 AM, Joseph Solomon @.***> wrote:

 This was not an issue in 0.3.10 but has been an issue in 0.3.11, 0.3.12, 0.3.13, and 0.3.14.

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