[client] Fix the export, notes/observables (#79)

Author: Samuel Hassine

examples/export_report_stix2.py

@@ -11,7 +11,7 @@
 opencti_api_client = OpenCTIApiClient(api_url, api_token)
 
 # Get the report
-report = opencti_api_client.report.read(id="c5577c45-533e-4bc5-8428-6cc6274f2a01")
+report = opencti_api_client.report.read(id="5a3878d7-2949-4fd9-87c7-2a38c65bfa59")
 
 # Create the bundle
 bundle = opencti_api_client.stix2.export_entity("report", report["id"], "full")

pycti/entities/opencti_stix_entity.py

@@ -845,7 +845,10 @@ def reports(self, **kwargs):
             processed_result = self.opencti.process_multiple_fields(
                 result["data"]["stixEntity"]
             )
-            return processed_result["reports"]
+            if processed_result:
+                return processed_result["reports"]
+            else:
+                return []
         else:
             self.opencti.log("error", "Missing parameters: id")
             return None
@@ -995,7 +998,10 @@ def notes(self, **kwargs):
             processed_result = self.opencti.process_multiple_fields(
                 result["data"]["stixEntity"]
             )
-            return processed_result["notes"]
+            if processed_result:
+                return processed_result["notes"]
+            else:
+                return []
         else:
             self.opencti.log("error", "Missing parameters: id")
             return None

pycti/utils/opencti_stix2.py

@@ -327,7 +327,7 @@ def extract_embedded_relationships(self, stix_object, types=None):
                         title = source_name
 
                     if "external_id" in external_reference:
-                        title = title + " (" + external_reference["external_id"] + ")"
+                        title = title + " (" + str(external_reference["external_id"]) + ")"
 
                     author = self.resolve_author(title)
                     report = self.opencti.report.create(