Support dict & list through json

arkindex/documents/export/__init__.py

+import json
 import logging
 import sqlite3
 import tempfile
@@ -50,13 +51,19 @@ def save_sqlite(rows, table, cursor):
     """
     Write a chunk of rows into an SQLite table
     """
+    def _serialize(value):
+        # Serialize UUID as string
+        if isinstance(value, uuid.UUID):
+            return str(value)
+
+        # Serialize list and dicts as json
+        if isinstance(value, (list, dict)):
+            return json.dumps(value)
+
+        return value
 
-    # Serialize UUID and lists as strings
     rows = [
-        [
-            str(value) if isinstance(value, (uuid.UUID, list)) else value
-            for value in row
-        ]
+        list(map(_serialize, row))
         for row in rows
     ]