fix : an issue with the upload_attachment method

```log
"attachments": [attach.hash for attach in attached],
AttributeError: 'list' object has no attribute 'hash'
```

qase-python-commons/changelog.md

@@ -2,6 +2,17 @@
 
 ## What's new
 
+Fixed an issue with the `upload_attachment` method:
+
+```log
+"attachments": [attach.hash for attach in attached],
+AttributeError: 'list' object has no attribute 'hash'
+```
+
+# [email protected]
+
+## What's new
+
 Show a test run link in end of log.
 
 # [email protected]

qase-python-commons/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "qase-python-commons"
-version = "3.1.7"
+version = "3.1.8"
 description = "A library for Qase TestOps and Qase Report"
 readme = "README.md"
 authors = [{name = "Qase Team", email = "[email protected]"}]

qase-python-commons/src/qase/commons/client/api_v1_client.py

@@ -139,7 +139,7 @@ def _prepare_result(self, project_code: str, result: Result) -> Dict:
             for attachment in result.attachments:
                 attach_id = self._upload_attachment(project_code, attachment)
                 if attach_id:
-                    attached.append(attach_id)
+                    attached.extend(attach_id)
 
         steps = []
         for step in result.steps:
@@ -254,7 +254,7 @@ def _prepare_step(self, project_code: str, step: Step) -> Dict:
                 for file in step.attachments:
                     attach_id = self._upload_attachment(project_code, file)
                     if attach_id:
-                        uploaded_attachments.append(attach_id)
+                        uploaded_attachments.extend(attach_id)
                 prepared_step['attachments'] = [attach.hash for attach in uploaded_attachments]
 
             if step.steps: