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 evolvediff(app, interactive=True, do_save=False, verbose=False, managed_upgrade_only=False): from django.db import connection cursor = connection.cursor() style = color.no_style() return show_evolution_plan(cursor, app, style)