From 6fb05d64539a10a2d769bb3d91dd226d50bf9278 Mon Sep 17 00:00:00 2001
From: Avi Slavkin <80623842+avislav@users.noreply.github.com>
Date: Wed, 23 Jun 2021 18:53:05 +0300
Subject: [PATCH] Update __init__.py (#4024)

In case of DELETE action we don't pass the value if we want to remove the attribute.
There are more cases but it's for you to handle.
---
 moto/dynamodb2/models/__init__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/moto/dynamodb2/models/__init__.py b/moto/dynamodb2/models/__init__.py
index 06bd3e85..373f932d 100644
--- a/moto/dynamodb2/models/__init__.py
+++ b/moto/dynamodb2/models/__init__.py
@@ -120,6 +120,8 @@ class Item(BaseModel):
     def validate_no_empty_key_values(self, attribute_updates, key_attributes):
         for attribute_name, update_action in attribute_updates.items():
             action = update_action.get("Action") or "PUT"  # PUT is default
+            if action == "DELETE":
+                continue
             new_value = next(iter(update_action["Value"].values()))
             if action == "PUT" and new_value == "" and attribute_name in key_attributes:
                 raise EmptyKeyAttributeException