def check_migration_histories(histories, delete_ghosts=False):
"Checks that there's no 'ghost' migrations in the database."
exists = SortedSet()
ghosts = []
for h in histories:
try:
m = h.get_migration()
m.migration()
except exceptions.UnknownMigration:
ghosts.append(h)
except ImproperlyConfigured:
pass # Ignore missing applications
exists.add(m)
if ghosts:
# They may want us to delete ghosts.
if delete_ghosts:
for h in ghosts:
h.delete()
else:
raise exceptions.GhostMigrations(ghosts)
return exists
def check_migration_histories(histories, delete_ghosts=False):
"Checks that there's no 'ghost' migrations in the database."
exists = SortedSet()
ghosts = []
for h in histories:
try:
m = h.get_migration()
m.migration()
except exceptions.UnknownMigration:
ghosts.append(h)
except ImproperlyConfigured:
pass # Ignore missing applications
exists.add(m)
if ghosts:
# They may want us to delete ghosts.
if delete_ghosts:
for h in ghosts:
h.delete()
else:
raise exceptions.GhostMigrations(ghosts)
return exists