[ClassicUI] Error exporting collections because include_items is always True (deserialization error)

[yurj]

Hi!

If I try to export a collection, I get:

2024-06-12 09:04:04,171 ERROR   [collective.exportimport.export_content:379][waitress-1] Error exporting http://localhost:9080/xxxmycoll
Traceback (most recent call last):
  File "/aaa/buildout-cache/eggs/plone.restapi-9.6.1-py3.11.egg/plone/restapi/deserializer/__init__.py", line 11, in json_body
    data = json.loads(request.get("BODY") or "{}")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/yurj/.pyenv/versions/3.11.9/lib/python3.11/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/yurj/.pyenv/versions/3.11.9/lib/python3.11/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/yurj/.pyenv/versions/3.11.9/lib/python3.11/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/aaa/buildout-cache/eggs/collective.exportimport-1.12-py3.11.egg/collective/exportimport/export_content.py", line 372, in export_content
    item = serializer()
           ^^^^^^^^^^^^
  File "/aaa/buildout-cache/eggs/plone.restapi-9.6.1-py3.11.egg/plone/restapi/serializer/collection.py", line 23, in __call__
    batch = HypermediaBatch(self.request, results)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/aaa/buildout-cache/eggs/plone.restapi-9.6.1-py3.11.egg/plone/restapi/batching.py", line 14, in __init__
    self.b_start = int(json_body(self.request).get("b_start", False)) or int(
                       ^^^^^^^^^^^^^^^^^^^^^^^
  File "/aaa/buildout-cache/eggs/plone.restapi-9.6.1-py3.11.egg/plone/restapi/deserializer/__init__.py", line 13, in json_body
    raise DeserializationError("No JSON object could be decoded")
plone.restapi.exceptions.DeserializationError: 'No JSON object could be decoded'

The problem seems here (

collective.exportimport/src/collective/exportimport/export_content.py

Lines 369 to 372 in 805cc30

	elif getattr(aq_base(obj), "isPrincipiaFolderish", False):
	item = serializer(include_items=False)
	else:
	item = serializer()

) :

the BODY seems a multipart and not a JSON.

So we have 2 issue:

• multipart instead of JSON
• include_items always set to True for Collections