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from __future__ import unicode_literals
from django.apps import apps
from django.db import models
def sql_flush(style, connection, only_django=False, reset_sequences=True, allow_cascade=False):
"""
Returns a list of the SQL statements used to flush the database.
If only_django is True, then only table names that have associated Django
models and are in INSTALLED_APPS will be included.
"""
if only_django:
tables = connection.introspection.django_table_names(only_existing=True, include_views=False)
else:
tables = connection.introspection.table_names(include_views=False)
seqs = connection.introspection.sequence_list() if reset_sequences else ()
statements = connection.ops.sql_flush(style, tables, seqs, allow_cascade)
return statements
def emit_pre_migrate_signal(verbosity, interactive, db):
# 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:
print("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)
def emit_post_migrate_signal(verbosity, interactive, db):
# 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:
print("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)
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