Make sure the function to rename is imported before renaming

django_codemod/visitors/base.py

@@ -72,6 +72,7 @@ def leave_ImportFrom(
                         obj=self.new_name,
                         asname=as_name,
                     )
+                    self.context.scratch[self.rename_from] = not import_alias.asname
                 else:
                     new_names.append(import_alias)
             if not new_names:
@@ -85,8 +86,14 @@ def leave_ImportFrom(
             return updated_node.with_changes(names=new_names)
         return super().leave_ImportFrom(original_node, updated_node)
 
+    @property
+    def _is_context_right(self):
+        return self.context.scratch.get(self.rename_from, False)
+
     def leave_Call(self, original_node: Call, updated_node: Call) -> BaseExpression:
-        if m.matches(updated_node, m.Call(func=m.Name(self.old_name))):
+        if self._is_context_right and m.matches(
+            updated_node, m.Call(func=m.Name(self.old_name))
+        ):
             updated_args = self.update_call_args(updated_node)
             return Call(args=updated_args, func=Name(self.new_name))
         return super().leave_Call(original_node, updated_node)

tests/visitors/test_base.py

@@ -28,6 +28,7 @@ def test_simple_substitution(self) -> None:
         self.assertCodemod(before, after)
 
     def test_already_imported(self) -> None:
+        """Function to modify is already imported with an alias."""
         before = """
             from django.dummy.module import func, better_func
 
@@ -41,6 +42,7 @@ def test_already_imported(self) -> None:
         self.assertCodemod(before, after)
 
     def test_import_with_alias(self) -> None:
+        """Function to modify is imported with an alias."""
         before = """
             from django.dummy.module import func as aliased_func
 
@@ -53,6 +55,38 @@ def test_import_with_alias(self) -> None:
         """
         self.assertCodemod(before, after)
 
+    def test_same_name_function(self) -> None:
+        """Should not be fooled by a function bearing the same name."""
+        before = """
+            from utils.helpers import func
+
+            result = func()
+        """
+        after = """
+            from utils.helpers import func
+
+            result = func()
+        """
+        self.assertCodemod(before, after)
+
+    def test_same_name_with_alias_import_function(self) -> None:
+        """Imported with alias and other function with the same name."""
+        before = """
+            from django.dummy.module import func as aliased_func
+            from utils.helpers import func
+
+            result = func()
+            aliased_func()
+        """
+        after = """
+            from utils.helpers import func
+            from django.dummy.module import better_func as aliased_func
+
+            result = func()
+            aliased_func()
+        """
+        self.assertCodemod(before, after)
+
     def test_extra_trailing_comma_when_last(self) -> None:
         """Extra trailing comma when removed import is the last one."""
         before = """