Fixed #21849 -- Included the count of silenced system checks in output.

django/core/management/base.py

@@ -365,11 +365,12 @@ class BaseCommand(object):
         Raises CommandError for any serious message (error or critical errors).
         If there are only light messages (like warnings), they are printed to
         stderr and no exception is raised.
-
         """
         all_issues = checks.run_checks(app_configs=app_configs, tags=tags)
 
         msg = ""
+        visible_issue_count = 0  # excludes silenced warnings
+
         if all_issues:
             debugs = [e for e in all_issues if e.level < checks.INFO and not e.is_silenced()]
             infos = [e for e in all_issues if checks.INFO <= e.level < checks.WARNING and not e.is_silenced()]
@@ -386,6 +387,7 @@ class BaseCommand(object):
 
             for issues, group_name in sorted_issues:
                 if issues:
+                    visible_issue_count += len(issues)
                     formatted = (
                         color_style().ERROR(force_str(e))
                         if e.is_serious()
@@ -393,21 +395,22 @@ class BaseCommand(object):
                         for e in issues)
                     formatted = "\n".join(sorted(formatted))
                     msg += '\n%s:\n%s\n' % (group_name, formatted)
-
-            msg = "System check identified some issues:\n%s" % msg
+            if msg:
+                msg = "System check identified some issues:\n%s" % msg
 
         if display_num_errors:
             if msg:
                 msg += '\n'
-            msg += "System check identified %s." % (
-                "no issues" if len(all_issues) == 0 else
-                "1 issue" if len(all_issues) == 1 else
-                "%s issues" % len(all_issues)
+            msg += "System check identified %s (%s silenced)." % (
+                "no issues" if visible_issue_count == 0 else
+                "1 issue" if visible_issue_count == 1 else
+                "%s issues" % visible_issue_count,
+                len(all_issues) - visible_issue_count,
             )
 
         if any(e.is_serious() and not e.is_silenced() for e in all_issues):
             raise CommandError(msg)
-        elif msg and all_issues:
+        elif msg and visible_issue_count:
             self.stderr.write(msg)
         elif msg:
             self.stdout.write(msg)

tests/admin_scripts/tests.py

@@ -1124,7 +1124,7 @@ class ManageCheck(AdminScriptTestCase):
         args = ['check']
         out, err = self.run_manage(args)
         self.assertNoOutput(err)
-        self.assertEqual(out, 'System check identified no issues.\n')
+        self.assertEqual(out, 'System check identified no issues (0 silenced).\n')
 
     def test_app_with_import(self):
         """ manage.py check does not raise errors when an app imports a base
@@ -1139,7 +1139,7 @@ class ManageCheck(AdminScriptTestCase):
         args = ['check']
         out, err = self.run_manage(args)
         self.assertNoOutput(err)
-        self.assertEqual(out, 'System check identified no issues.\n')
+        self.assertEqual(out, 'System check identified no issues (0 silenced).\n')
 
     def test_output_format(self):
         """ All errors/warnings should be sorted by level and by message. """
@@ -1163,7 +1163,7 @@ class ManageCheck(AdminScriptTestCase):
             "obj: First warning\n"
             "\tHINT: Hint\n"
             "\n"
-            "System check identified 3 issues.\n"
+            "System check identified 3 issues (0 silenced).\n"
         )
         self.assertEqual(err, expected_err)
         self.assertNoOutput(out)
@@ -1191,7 +1191,7 @@ class ManageCheck(AdminScriptTestCase):
             "WARNINGS:\n"
             "?: A warning\n"
             "\n"
-            "System check identified 1 issue.\n"
+            "System check identified 1 issue (0 silenced).\n"
         )
         self.assertEqual(err, expected_err)
         self.assertNoOutput(out)

tests/check_framework/tests.py

@@ -7,7 +7,7 @@ import sys
 from django.apps import apps
 from django.conf import settings
 from django.core import checks
-from django.core.checks import Error
+from django.core.checks import Error, Warning
 from django.core.checks.registry import CheckRegistry
 from django.core.checks.compatibility.django_1_6_0 import check_1_6_compatibility
 from django.core.management.base import CommandError
@@ -195,12 +195,22 @@ class CheckCommandTests(TestCase):
         self.assertRaises(CommandError, call_command, 'check', tags=['missingtag'])
 
 
-def custom_system_check(app_configs, **kwargs):
+def custom_error_system_check(app_configs, **kwargs):
     return [
         Error(
             'Error',
             hint=None,
-            id='mycheck.E001',
+            id='myerrorcheck.E001',
+        )
+    ]
+
+
+def custom_warning_system_check(app_configs, **kwargs):
+    return [
+        Warning(
+            'Warning',
+            hint=None,
+            id='mywarningcheck.E001',
         )
     ]
 
@@ -209,15 +219,39 @@ class SilencingCheckTests(TestCase):
 
     def setUp(self):
         self.old_stdout, self.old_stderr = sys.stdout, sys.stderr
-        sys.stdout, sys.stderr = StringIO(), StringIO()
+        self.stdout, self.stderr = StringIO(), StringIO()
+        sys.stdout, sys.stderr = self.stdout, self.stderr
 
     def tearDown(self):
         sys.stdout, sys.stderr = self.old_stdout, self.old_stderr
 
-    @override_settings(SILENCED_SYSTEM_CHECKS=['mycheck.E001'])
-    @override_system_checks([custom_system_check])
-    def test_simple(self):
+    @override_settings(SILENCED_SYSTEM_CHECKS=['myerrorcheck.E001'])
+    @override_system_checks([custom_error_system_check])
+    def test_silenced_error(self):
+        out = StringIO()
+        err = StringIO()
         try:
-            call_command('check')
+            call_command('check', stdout=out, stderr=err)
         except CommandError:
             self.fail("The mycheck.E001 check should be silenced.")
+        self.assertEqual(out.getvalue(), '')
+        self.assertEqual(
+            err.getvalue(),
+            'System check identified some issues:\n\n'
+            'ERRORS:\n'
+            '?: (myerrorcheck.E001) Error\n\n'
+            'System check identified 1 issue (0 silenced).\n'
+        )
+
+    @override_settings(SILENCED_SYSTEM_CHECKS=['mywarningcheck.E001'])
+    @override_system_checks([custom_warning_system_check])
+    def test_silenced_warning(self):
+        out = StringIO()
+        err = StringIO()
+        try:
+            call_command('check', stdout=out, stderr=err)
+        except CommandError:
+            self.fail("The mycheck.E001 check should be silenced.")
+
+        self.assertEqual(out.getvalue(), 'System check identified no issues (1 silenced).\n')
+        self.assertEqual(err.getvalue(), '')

tests/logging_tests/tests.py

@@ -333,7 +333,7 @@ class SettingsConfigTest(AdminScriptTestCase):
         # validate is just an example command to trigger settings configuration
         out, err = self.run_manage(['validate'])
         self.assertNoOutput(err)
-        self.assertOutput(out, "System check identified no issues.")
+        self.assertOutput(out, "System check identified no issues (0 silenced).")
 
 
 def dictConfig(config):