feat: handle splitted fr/en abstract & title

custom_pgvector.py

@@ -343,18 +343,18 @@ class CustomPGVector(VectorStore):
                     f"""
                     select
                         a.id,
-                        a.title,
+                        a.title_en,
                         a.doi,
-                        a.abstract,
+                        a.abstract_en,
                         string_agg(distinct keyword."name", ',') as keywords, 
                         string_agg(distinct author."name", ',') as authors,
-                        abstract_embedding <-> '{str(embedding)}' as distance
+                        abstract_embedding_en <-> '{str(embedding)}' as distance
                     from article a
                     left join article_keyword ON article_keyword.article_id = a.id 
                     left join keyword on article_keyword.keyword_id = keyword.id
                     left join article_author ON article_author.article_id = a.id
                     left join author on author.id = article_author.author_id  
-                    where abstract != 'NaN'
+                    where abstract_en != ''
                     GROUP BY a.id
                     ORDER BY distance
                     LIMIT {k};