Invalid JSON causes datastore API to throw 500

[dafeder]

Current Behavior

When we submit valid JSON data to the Datastore API but in a form that does not validate against the query schema, as expected we get a 400 error and some error output. However, submitting completely invalid JSON results in a 500 error.

This issue is specific to the "resource query" datastore endpoint. Submitting invalid JSON to the Metastore API, for instance, will return a 400 "Invalid JSON" response. The datastore should have the same behavior.

Expected Behavior

Submitting completely invalid JSON, such as

{
  "foo": bar,
}

should result in a 400 error and some output.

Steps To Reproduce

POST https://demo.getdkan.org/api/1/datastore/query/cedcd327-4e5d-43f9-8eb1-c11850fa7c55/0 HTTP/1.1

{
  "conditions": [
}

Relevant log output (optional)

The website encountered an unexpected error. Please try again later.

Anything else?

No response