Update RecordPubli to add protection.

modules/invenio_tools/recordpubli.py

@@ -616,7 +616,7 @@ class RecordPubli(Record):
 
         """
         df = self["publication_info"]
-        return df.title.iloc[0]
+        return (df.title.iloc[0] if "title" in df else "")
 
     def paper_pages(self):
         """The page number / range when the record is published in a review.
@@ -628,7 +628,7 @@ class RecordPubli(Record):
 
         """
         df = self["publication_info"]
-        return df.pagination.iloc[0]
+        return (df.pagination.iloc[0] if "pagination" in df else "")
 
     def paper_reference(self):
         """The full reference for a publication published in a review.
@@ -640,8 +640,17 @@ class RecordPubli(Record):
                   published in a review.
 
         """
-        paper = self["publication_info"].iloc[0]
+        df = self["publication_info"]
+
+        its = df.columns.intersection({"title",
+                                       "volume",
+                                       "year",
+                                       "pagination"})
+
+        if len(its) != 4:
+            return ""
 
+        paper = df.iloc[0]
         li = [paper.title,
               paper.volume,
               paper.year,
@@ -682,7 +691,7 @@ class RecordPubli(Record):
 
         """
         df = self["publication_info"]
-        return df.volume.iloc[0]
+        return (df.volume.iloc[0] if "volume" in df else "")
 
     def paper_year(self):
         """The year of the publication.
@@ -693,7 +702,7 @@ class RecordPubli(Record):
 
         """
         df = self["publication_info"]
-        return df.year.iloc[0]
+        return (df.year.iloc[0] if "year" in df else "")
 
     def preprint_number(self):
         """The ArXiv preprint number.