Add deprecation warning when importing pymongo

Materials-Consortia · Dec 8, 2021 · 1df1b80 · 1df1b80
1 parent e765b95
commit 1df1b80
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/optimade/server/entry_collections/mongo.py b/optimade/server/entry_collections/mongo.py
@@ -10,7 +10,13 @@
 
 
 if CONFIG.database_backend.value == "mongodb":
-    from pymongo import MongoClient
+    from pymongo import MongoClient, version_tuple
+
+    if version_tuple[0] < 4:
+        LOGGER.warning(
+            "Support for pymongo<=3 (and thus MongoDB v3) is deprecated and will be "
+            "removed in the next minor release."
+        )
 
     LOGGER.info("Using: Real MongoDB (pymongo)")