Big integer support for Integer widget (django-import-export#788)

Signed-off-by: José Luis Di Biase <josx@interorganic.com.ar>

docs/changelog.rst

@@ -4,6 +4,7 @@ Changelog
 2.7.0-dev (unreleased)
 ---------
 
+- Big integer support for Integer widget (#788)
 - Run compilemessages command to keep .mo files in sync (#1299)
 - Add ability to rollback the import on validation error (#1339)
 - Fix missing migration on example app (#1346)

import_export/widgets.py

@@ -85,7 +85,7 @@ class IntegerWidget(NumberWidget):
     def clean(self, value, row=None, *args, **kwargs):
         if self.is_empty(value):
             return None
-        return int(float(value))
+        return int(Decimal(value))
 
 
 class DecimalWidget(NumberWidget):

tests/core/tests/test_resources.py

@@ -1,4 +1,5 @@
 import json
+import decimal
 from collections import OrderedDict
 from copy import deepcopy
 from datetime import date
@@ -625,8 +626,8 @@ def test_import_data_error_saving_model(self):
         self.assertTrue(result.has_errors())
         self.assertTrue(result.rows[0].errors)
         actual = result.rows[0].errors[0].error
-        self.assertIsInstance(actual, ValueError)
-        self.assertIn("could not convert string to float", str(actual))
+        self.assertIsInstance(actual, (ValueError, decimal.InvalidOperation))
+        self.assertIn(str(actual), {"could not convert string to float", "[<class 'decimal.ConversionSyntax'>]"})
 
     def test_import_data_delete(self):
 

tests/core/tests/test_widgets.py

@@ -255,10 +255,14 @@ class IntegerWidgetTest(TestCase):
     def setUp(self):
         self.value = 0
         self.widget = widgets.IntegerWidget()
+        self.bigintvalue = 163371428940853127
 
     def test_clean_integer_zero(self):
         self.assertEqual(self.widget.clean(0), self.value)
 
+    def test_clean_big_integer(self):
+        self.assertEqual(self.widget.clean(163371428940853127), self.bigintvalue)
+
     def test_clean_string_zero(self):
         self.assertEqual(self.widget.clean("0"), self.value)
         self.assertEqual(self.widget.clean("0.0"), self.value)
@@ -421,4 +425,4 @@ def test_clean_returns_empty_list_for_empty_arg(self):
     def test_render(self):
         v = ["a", "b", "c"]
         s = "a,b,c"
-        self.assertEqual(s, self.widget.render(v))
+        self.assertEqual(s, self.widget.render(v))