Fixed #26287 -- Added support for addition operations to SimpleLazyObject.

3 files changed, 18 insertions, 1 deletions

diff --git a/django/utils/functional.py b/django/utils/functional.py
index 9e1be0fe0f..2696dd49c5 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -432,6 +432,12 @@ class SimpleLazyObject(LazyObject):
             return result
         return copy.deepcopy(self._wrapped, memo)
 
+    __add__ = new_method_proxy(operator.add)
+
+    @new_method_proxy
+    def __radd__(self, other):
+        return other + self
+
 
 def partition(predicate, values):
     """
diff --git a/docs/releases/4.1.txt b/docs/releases/4.1.txt
index 4b62cf09cf..6dd36e498c 100644
--- a/docs/releases/4.1.txt
+++ b/docs/releases/4.1.txt
@@ -294,7 +294,7 @@ URLs
 Utilities
 ~~~~~~~~~
 
-* ...
+* ``SimpleLazyObject`` now supports addition operations.
 
 Validators
 ~~~~~~~~~~
diff --git a/tests/utils_tests/test_lazyobject.py b/tests/utils_tests/test_lazyobject.py
index 9ccae595f4..0ff15469d4 100644
--- a/tests/utils_tests/test_lazyobject.py
+++ b/tests/utils_tests/test_lazyobject.py
@@ -317,6 +317,17 @@ class SimpleLazyObjectTestCase(LazyObjectTestCase):
         self.assertIsInstance(obj._wrapped, int)
         self.assertEqual(repr(obj), "<SimpleLazyObject: 42>")
 
+    def test_add(self):
+        obj1 = self.lazy_wrap(1)
+        self.assertEqual(obj1 + 1, 2)
+        obj2 = self.lazy_wrap(2)
+        self.assertEqual(obj2 + obj1, 3)
+        self.assertEqual(obj1 + obj2, 3)
+
+    def test_radd(self):
+        obj1 = self.lazy_wrap(1)
+        self.assertEqual(1 + obj1, 2)
+
     def test_trace(self):
         # See ticket #19456
         old_trace_func = sys.gettrace()