JSON with Python: No expected validation errors with jsonschema

Question

I have defined a schema and used it to validate JSON objects but I never get the expected ValidationError. For example:

>>> from jsonschema import validate
>>> schema = {
...   "type" : "object",
...   "properties" : {
...       "address" : {"type" : "string"},
...    },
... }
>>>
>>> schema
{'type': 'object', 'properties': {'address': {'type': 'string'}}}
>>> validate(instance={"address" : "123 Main St.", "price" : 34.99}, schema=schema)
>>> validate(instance={"address1" : "123 Main St.", "price" : 34.99}, schema=schema)
>>>
>>> validate(instance={"addresdvzdvfafczscss1" : "123 Main St.", "price" : 34.99}, schema=schema)
>>> validate(instance={"addresdvzdvfafczscss1" : "123 Main St.", "price" : 34.99}, schema=schema)
# doctest: +IGNORE_EXCEPTION_DETAIL
>>>
>>> validate(instance={"addresdvzdvfafczscss1" : "123 Main St.",}, schema=schema)  # doctest: +IGNO
RE_EXCEPTION_DETAIL
>>>
>>> type(schema)
<class 'dict'>
>>> str(schema)
"{'type': 'object', 'properties': {'address': {'type': 'string'}}}"
>>> validate(instance={"addresdvzdvfafczscss1" : 123,}, schema=schema)  # doctest: +IGNORE_EXCEPTIO
N_DETAIL
>>>

Can anyone see what I'm doing wrong?

Ether · Accepted Answer · 2020-10-30 16:01:11Z

2

You didn't say what you expected to get as an error, but I'm going to guess that you want the validation to complain that the "address" property is missing. To achieve that, you need to use the required keyword, so try:

{
  "type": "object",
  "required": [ "address" ],
  "properties": {
    "address": {"type": "string"}
  }
}

You may also want to say "no other properties other than address are permitted" -- which can be done with "additionalProperties": false.

edited Oct 30, 2020 at 16:01

answered Oct 29, 2020 at 23:11

Ether

54.2k13 gold badges91 silver badges162 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

JSON with Python: No expected validation errors with jsonschema

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related