def get_sql_evolution_detailed(app, style, notify):
"Returns SQL to update an existing schema to match the existing models."
from django.db import connection
cursor = connection.cursor()
#show_evolution_plan(cursor, app, style)
ops, introspection = get_operations_and_introspection_classes(style)
app_name = app.__name__.split('.')[-2]
final_output = []
db_schema, model_schema = get_schemas(cursor, app, style)
cursor, app_name, get_installed_tables(app)
schema_fingerprint = introspection.get_schema_fingerprint(model_schema)
schema_recognized, all_upgrade_paths, available_upgrades, best_upgrade \
= get_managed_evolution_options(app, schema_fingerprint, style, notify)
if schema_recognized:
if notify: sys.stderr.write(style.NOTICE("deseb: Current schema fingerprint for '%s' is '%s' (recognized)\n" % (app_name, schema_fingerprint)))
final_output.extend(best_upgrade[2])
return schema_fingerprint, False, final_output
else:
if notify: sys.stderr.write(style.NOTICE("deseb: Current schema fingerprint for '%s' is '%s' (unrecognized)\n" % (app_name, schema_fingerprint)))
final_output.extend(get_introspected_evolution_options(app, style))
return schema_fingerprint, True, final_output
def evolvedb(app, interactive=True, do_save=False, verbose=False, managed_upgrade_only=False):
from django.db import connection
cursor = connection.cursor()
style = color.no_style()
ops, introspection = get_operations_and_introspection_classes(style)
app_name = app.__name__.split('.')[-2]
seen_schema_fingerprints = set()
fingerprints, evolutions = get_fingerprints_evolutions_from_app(app, style, verbose)
if fingerprints and evolutions:
if verbose:
print 'deseb: %s.schema_evolution module found (%i fingerprints, %i evolutions)' % \
(app_name, len(fingerprints), len(evolutions))
while True:
commands = []
commands_color = []
schema_fingerprint = introspection.get_schema_fingerprint(cursor, app_name, get_installed_tables(app))
schema_recognized, all_upgrade_paths, available_upgrades, best_upgrade = \
get_managed_evolution_options(app, schema_fingerprint, style, verbose)
if fingerprints and evolutions:
if schema_recognized:
if verbose or interactive:
print "deseb: fingerprint for '%s' is '%s' (recognized)" % (app_name, schema_fingerprint)
else:
if verbose or interactive:
print "deseb: fingerprint for '%s' is '%s' (unrecognized)" % (app_name, schema_fingerprint)
managed_upgrade = schema_recognized and available_upgrades and best_upgrade and best_upgrade[3]>0
if managed_upgrade:
if verbose or interactive:
print "\t and a managed schema upgrade to '%s' is available:" % best_upgrade[1], best_upgrade[3]
commands_color = commands = best_upgrade[2]
elif not managed_upgrade_only:
commands = get_introspected_evolution_options(app, style)
commands_color = get_introspected_evolution_options(app, color.color_style())
if interactive:
if commands:
print '%s: the following schema upgrade is available:' % app_name
# else:
# print '%s: schema is up to date' % app_name
if commands:
if interactive or DEBUG:
for cmd in commands_color:
print cmd
else:
break
if interactive:
confirm = raw_input("do you want to run the preceeding commands?\ntype 'yes' to continue, or 'no' to cancel: ")
else:
confirm = 'yes'
if confirm == 'yes':
connection._commit() # clean previous commands run state
for cmd in commands:
if cmd[:3] != '-- ':
cursor.execute(cmd)
connection._commit() # commit changes
if interactive: print 'schema upgrade executed'
new_schema_fingerprint = introspection.get_schema_fingerprint(cursor, app_name, get_installed_tables(app))
if schema_fingerprint==new_schema_fingerprint:
print "schema fingerprint was unchanged - this really shouldn't happen"
else:
if commands and not managed_upgrade and (schema_fingerprint,new_schema_fingerprint) not in all_upgrade_paths:
if interactive and do_save:
confirm = raw_input("do you want to save these commands in %s.schema_evolution?\n"
"type 'yes' to continue, or 'no' to cancel: " % app_name)
else:
confirm = 'yes'
if do_save and confirm == 'yes':
save_managed_evolution(app, commands, schema_fingerprint, new_schema_fingerprint)
if not managed_upgrade: break
else:
if interactive: print 'schema not saved'
break
seen_schema_fingerprints.add(schema_fingerprint)
schema_fingerprint = new_schema_fingerprint
if managed_upgrade:
if schema_fingerprint==best_upgrade[1]:
if verbose:
print '\tfingerprint verification successful'
else:
if verbose:
print "\tfingerprint verification failed (is '%s'; was expecting '%s')" % \
(schema_fingerprint, best_upgrade[1])
break
print
if schema_fingerprint in seen_schema_fingerprints:
break
def modeltest(app_name, use_aka=True):
if not app_name:
raise Exception("No test name given")
if not os.path.exists('settings.py'):
raise Exception('Oops... file settings.py does not exist! Please copy your settings there!')
from django.conf import settings
from django.db.models.loading import get_apps, get_app
from deseb.schema_evolution import evolvediff
from django.core.management.color import no_style
from deseb.actions import get_introspected_evolution_options
from django.core.management.sql import sql_create, sql_indexes
from django.db.transaction import commit_on_success
from django.db import connection
from deseb.actions import get_schemas, show_evolution_plan
if DEBUG:
print "Test %s" % app_name
#reset on post state and pre state
from deseb import add_aka_support
if use_aka:
add_aka_support()
style = no_style()
settings.INSTALLED_APPS = tuple(list(settings.INSTALLED_APPS[:5]) + [app_name])
write_file(app_name+"/models.py", '') # re-init models.py
write_file(app_name+"/errdiff.%s.actual" % settings.DATABASE_ENGINE, "")
write_file(app_name+"/errors.%s.actual" % settings.DATABASE_ENGINE, "")
get_apps()
drop_all_tables()
reload_models(app_name, 'pre')
app = get_app(app_name)
create = sql_create(app, style) + sql_indexes(app, style)
write_file(app_name+"/init.%s.actual" % settings.DATABASE_ENGINE, create)
#FIXME: compare to init.correct later instead of copying
write_file(app_name+"/init.%s.planned" % settings.DATABASE_ENGINE, create)
reset = sql_create(app, style)
#print 'SQL:', '\n'.join(reset)
commit_on_success(run_sql)(reset)
reset_idx = sql_indexes(app, style)
run_sql(reset_idx)
reload_models(app_name, 'post')
if use_aka:
from deseb.storage import update_with_aka, save_renames
update_with_aka(app_name)
save_renames(app_name)
cursor = connection.cursor()
db_schema, model_schema = get_schemas(cursor, app, style)
diff = show_evolution_plan(cursor, app, style, db_schema, model_schema)
write_file(app_name+"/diff.%s.actual" % settings.DATABASE_ENGINE, diff)
#FIXME: compare to diff.correct later instead of copying
write_file(app_name+"/diff.%s.planned" % settings.DATABASE_ENGINE, diff)
actions = get_introspected_evolution_options(app, style, db_schema, model_schema)
write_file(app_name+"/actions.%s.actual" % settings.DATABASE_ENGINE, actions)
#FIXME: compare to diff.correct later instead of copying
write_file(app_name+"/actions.%s.planned" % settings.DATABASE_ENGINE, actions)
try:
commit_on_success(run_sql)(actions)
except:
#print 'changes rolled back'
from django.db import transaction
transaction.rollback()
raise
#else:
#print 'changes committed'
cursor = connection.cursor()
db_schema, model_schema = get_schemas(cursor, app, style, model_schema=model_schema)
# due to sqlite3/pysqlite bug, caused deferred index creation, we reget db schema.
# this is f*****g weird, but i've no any explanation, why getting indxes
# doesn't work correctly first time
db_schema, model_schema = get_schemas(cursor, app, style, model_schema=model_schema)
diff = show_evolution_plan(cursor, app, style, db_schema, model_schema)
write_file(app_name+"/errdiff.%s.actual" % settings.DATABASE_ENGINE, diff)
diff1 = diff.split('\n',1)[1]
if diff1:
print "Errors:"
print diff1
try:
actions, db_schema, model_schema = get_introspected_evolution_options(app, style, db_schema, model_schema)
except Exception:
actions = ['Was unable to generate error diff SQL commands']
write_file(app_name+"/errors.%s.actual" % settings.DATABASE_ENGINE, actions)
#FIXME: compare to diff.correct later instead of copying
#write_file(app_name+"/errors.%s.planned" % settings.DATABASE_ENGINE, actions)
return diff1
