fixes all suggestions from comment #1020 (review)

AUTHORS

@@ -45,3 +45,4 @@ Tim Selman <timcbaoth@gmail.com>
 Tom Glowka <glowka.tom@gmail.com>
 Ulrich Schuster <ulrich.schuster@mailworks.org>
 Yaniv Peer <yanivpeer@gmail.com>
+Jonas Kiefer <https://github.com/jokiefer>

CHANGELOG.md

@@ -22,6 +22,7 @@ any parts of the framework not mentioned in the documentation should generally b
 * Raise comprehensible error when reserved field names `meta` and `results` are used.
 * Use `relationships` in the error object `pointer` when the field is actually a relationship.
 * Added missing inflection to the generated OpenAPI schema.
+* Added error message if AttributeError is raised by `get_resource_type_from_serializer()`
 
 ### Changed
 

rest_framework_json_api/utils.py

@@ -320,10 +320,9 @@ def get_resource_type_from_serializer(serializer):
         return meta.resource_name
     elif hasattr(meta, "model"):
         return get_resource_type_from_model(meta.model)
-    # inspect.currentframe().f_code.co_firstlineno
     raise AttributeError(
-        f"can not detect 'resource_name' on serializer '{serializer.__class__.__name__}'" 
-        f" in module '{serializer.__class__.__module__}:{inspect.getsourcelines(serializer.__class__)[-1]}'")
+        f"can not detect 'resource_name' on serializer '{serializer.__class__.__name__}'"
+        f" in module '{serializer.__class__.__module__}'")
 
 
 def get_included_resources(request, serializer=None):

tests/test_utils.py

@@ -1,5 +1,4 @@
 import pytest
-import inspect
 from django.db import models
 from rest_framework import status
 from rest_framework.fields import Field
@@ -381,15 +380,14 @@ class Meta:
 
     assert included_serializers == expected_included_serializers
 
+
 def test_get_resource_type_from_serializer_error_message():
 
     class SerializerWithoutResourceName(serializers.Serializer):
         something = Field()
-    
+
     serializer = SerializerWithoutResourceName()
-        
-    try:
+
+    with pytest.raises(AttributeError) as excinfo:
         get_resource_type_from_serializer(serializer=serializer)
-        raise AssertionError('no AttributeError was raised')
-    except AttributeError as ex:
-        assert str(ex) == f"can not detect 'resource_name' on serializer 'SerializerWithoutResourceName' in module 'tests.test_utils:{inspect.getsourcelines(serializer.__class__)[-1]}'"
+    assert str(excinfo.value) == "can not detect 'resource_name' on serializer 'SerializerWithoutResourceName' in module 'tests.test_utils'"