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-rw-r--r--python/fatcat_tools/importers/doaj_article.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/python/fatcat_tools/importers/doaj_article.py b/python/fatcat_tools/importers/doaj_article.py
index 30007857..bbc5e969 100644
--- a/python/fatcat_tools/importers/doaj_article.py
+++ b/python/fatcat_tools/importers/doaj_article.py
@@ -321,6 +321,8 @@ class DoajArticleImporter(EntityImporter):
pmid: Optional[str] = None
pmcid: Optional[str] = None
for id_obj in identifiers:
+ if not id_obj.get('id'):
+ continue
if id_obj['type'].lower() == 'doi':
doi = clean_doi(id_obj['id'])
elif id_obj['type'].lower() == 'pmid':