Fixed #19341 -- Detected NullBooleanField when introspecting models

Thanks Tim Bowden for the report.

1 files changed, 6 insertions, 3 deletions

diff --git a/django/core/management/commands/inspectdb.py b/django/core/management/commands/inspectdb.py
index 08870af56b..8fab69de59 100644
--- a/django/core/management/commands/inspectdb.py
+++ b/django/core/management/commands/inspectdb.py
@@ -108,9 +108,12 @@ class Command(NoArgsCommand):
                 # Add 'null' and 'blank', if the 'null_ok' flag was present in the
                 # table description.
                 if row[6]: # If it's NULL...
-                    extra_params['blank'] = True
-                    if not field_type in ('TextField(', 'CharField('):
-                        extra_params['null'] = True
+                    if field_type == 'BooleanField(':
+                        field_type = 'NullBooleanField('
+                    else:
+                        extra_params['blank'] = True
+                        if not field_type in ('TextField(', 'CharField('):
+                            extra_params['null'] = True
 
                 field_desc = '%s = models.%s' % (att_name, field_type)
                 if extra_params: