From db88a7bbffcb0da87adf8dee9b71142f35f6cd1d Mon Sep 17 00:00:00 2001
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Date: Mon, 23 Nov 2020 10:39:46 +0300
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---
 calculate/templates/template_filters.py  |  4 +++-
 tests/templates/test_template_filters.py | 16 ++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/calculate/templates/template_filters.py b/calculate/templates/template_filters.py
index c253616..fdc2924 100644
--- a/calculate/templates/template_filters.py
+++ b/calculate/templates/template_filters.py
@@ -3,7 +3,9 @@ def cut(instr: str, field_num: int = 0, delimiter: str = "-") -> str:
     Разделить входную строку `instr` разделительем `delimiter`
     и вернуть поле `field_num`.
     """
-    parts = instr.split(delimiter)
+    if instr is None:
+        return ""
+    parts = str(instr).split(delimiter)
     if field_num < len(parts):
         return parts[field_num]
     else:
diff --git a/tests/templates/test_template_filters.py b/tests/templates/test_template_filters.py
index fefece7..996b2de 100644
--- a/tests/templates/test_template_filters.py
+++ b/tests/templates/test_template_filters.py
@@ -1,6 +1,10 @@
 import pytest
 import calculate.templates.template_filters as filters
 
+class TestObj:
+    def __str__(self):
+        return "TestObj_value"
+
 @pytest.mark.parametrize('case',
     [
         {
@@ -9,6 +13,18 @@ import calculate.templates.template_filters as filters
             "params": (),
             "result": ""
         },
+        {
+            "name": "none value",
+            "data": None,
+            "params": (),
+            "result": ""
+        },
+        {
+            "name": "obj value",
+            "data": TestObj(),
+            "params": (),
+            "result": "TestObj_value"
+        },
         {
             "name": "default",
             "data": "123",