Add management command to check submission metadata correctness

conflicts/management/commands/check_submission_metadata.py

+__copyright__ = "Copyright © Stichting SciPost (SciPost Foundation)"
+__license__ = "AGPL v3"
+
+
+import traceback
+
+from django.core.management.base import BaseCommand
+
+from submissions.models import Submission
+
+
+class Command(BaseCommand):
+    """Verify the metadata formatting and flag errors."""
+
+    def handle(self, *args, **kwargs):
+        for sub in Submission.objects.all():
+            # Check that the author list is properly formatted
+            try:
+                if True or 'entries' in sub.metadata:
+                    author_str_list = [
+                        a['name'].split()[-1] for a in sub.metadata['entries'][0]['authors']]
+            except:
+                print('Error for %s' % sub.preprint)
+                traceback.print_exc()