`"format":"date-time"` not working

[JakeSummers]

`"format":"date-time"` not working

[Julian]

https://python-jsonschema.readthedocs.io/en/stable/faq/#my-schema-specifies-format-validation-why-do-invalid-instances-seem-valid

[JakeSummers]

Thanks for the link @Julian . Follow up question for you.

The doc you linked only discusses Draft 2019-09 and below. It looks like json-schema 2020-12 introduced a new term: format-assertion:

Link

Link

Is it correct that you do not currently support format-assertion?

[Julian]

Supporting it via what mechanism?

[JakeSummers]

Supporting it via what mechanism?

Any mechanism 😄 .

I would like to validate that the data inside my strings is correctly formatted as a date-time.

[Julian]

I literally linked you to the docs to do so :)

[JakeSummers]

Thanks, I see it now.

The solution is hidden in the See also box here:

For anyone else running into the same issue, the fix is pretty simple:

@@ -3,6 +3,7 @@ import json
 import pytest
 from jsonschema import validate
 from jsonschema.exceptions import ValidationError
+from jsonschema.validators import Draft202012Validator


 @pytest.mark.parametrize(
@@ -79,4 +80,7 @@ def test_date_format():
     """)

     with pytest.raises(ValidationError):
-        validate(example, schema)
+        validate(example,
+                 schema,
+                 format_checker=Draft202012Validator.FORMAT_CHECKER,
+                 )

Link to doc on solution: https://python-jsonschema.readthedocs.io/en/stable/validate/#validating-formats