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import sys
from django.apps import apps
from django.db import models
def sql_flush(style, connection, reset_sequences=True, allow_cascade=False):
"""
Return a list of the SQL statements used to flush the database.
"""
tables = connection.introspection.django_table_names(
only_existing=True, include_views=False
)
return connection.ops.sql_flush(
style,
tables,
reset_sequences=reset_sequences,
allow_cascade=allow_cascade,
)
def emit_pre_migrate_signal(verbosity, interactive, db, **kwargs):
# Emit the pre_migrate signal for every application.
for app_config in apps.get_app_configs():
if app_config.models_module is None:
continue
if verbosity >= 2:
stdout = kwargs.get("stdout", sys.stdout)
stdout.write(
"Running pre-migrate handlers for application %s" % app_config.label
)
models.signals.pre_migrate.send(
sender=app_config,
app_config=app_config,
verbosity=verbosity,
interactive=interactive,
using=db,
**kwargs,
)
def emit_post_migrate_signal(verbosity, interactive, db, **kwargs):
# Emit the post_migrate signal for every application.
for app_config in apps.get_app_configs():
if app_config.models_module is None:
continue
if verbosity >= 2:
stdout = kwargs.get("stdout", sys.stdout)
stdout.write(
"Running post-migrate handlers for application %s" % app_config.label
)
models.signals.post_migrate.send(
sender=app_config,
app_config=app_config,
verbosity=verbosity,
interactive=interactive,
using=db,
**kwargs,
)
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