Improve parsing DynamoDB begins_with expression

A query fails if it has a space between `begins_with` and `(`, for example: ```begins_with (getmoto#1, :1)``` Fix getmoto#1996
shmygol · Nov 21, 2019 · 6ea6001 · 6ea6001
1 parent 2af4e7a
commit 6ea6001
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/moto/dynamodb2/responses.py b/moto/dynamodb2/responses.py
@@ -481,7 +481,7 @@ def query(self):
                     ]
                 elif "begins_with" in range_key_expression:
                     range_comparison = "BEGINS_WITH"
-                    range_values = [value_alias_map[range_key_expression_components[1]]]
+                    range_values = [value_alias_map[range_key_expression_components[-1]]]
                 else:
                     range_values = [value_alias_map[range_key_expression_components[2]]]
             else: