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Feature enhancement: option to truncate model tables before seeding #108

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Feature enhancement: option to truncate model tables before seeding #108

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8bdea37
Enhancement #81
havocbane Oct 25, 2021
5ca333e
Address shadowed & mutable kwarg in execute method.
havocbane Oct 25, 2021
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14 changes: 14 additions & 0 deletions django_seed/management/commands/seed.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,11 @@ def add_arguments(self, parser: argparse.ArgumentParser):
required=False, type=str, help=help_text,
metavar=('model.field', 'value'), dest='seeder')

help_text = 'Truncate app tables before seeding.'
parser.add_argument('--truncate', action='store_true',
default=False, required=False,
help=help_text, dest='truncate')

def handle_app_config(self, app_config, **options):
if app_config.models_module is None:
raise SeederCommandError('You must provide an app to seed')
Expand Down Expand Up @@ -50,6 +55,15 @@ def handle_app_config(self, app_config, **options):
seeder.add_entity(model, number, seeders[model.__name__])
else:
seeder.add_entity(model, number)

if options['truncate']:
self.stdout.write(f"Truncating {model.__name__} before seeding...",
style_func=self.style.WARNING)
manager = model.objects.db_manager()
total, _ = manager.all().delete()
self.stdout.write(f"Removed {total} {model.__name__} objects.",
style_func=self.style.WARNING)

self.stdout.write('Seeding %i %ss' % (number, model.__name__))

generated = seeder.execute()
Expand Down
6 changes: 4 additions & 2 deletions django_seed/seeder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -213,16 +213,18 @@ def add_entity(self, model, number, customFieldFormatters=None):
}
self.orders.append(order)

def execute(self, using=None, inserted_entities={}):
def execute(self, using=None, inserted_entities=None):
"""
Populate the database using all the Entity classes previously added.
:param using A Django database connection name
:rtype: A list of the inserted PKs
"""
if inserted_entities is None:
inserted_entities = {}

if not using:
using = self.get_connection()

inserted_entities = {}
while len(self.orders):
order = self.orders.pop(0)
number = order["quantity"]
Expand Down