django.db.migrations.exceptions.InconsistentMigrationHistory # Beim Erstellen eines benutzerdefinierten Benutzermodells
Ich hatte heute das gleiche Problem und keine der oben genannten Lösungen funktionierte. Dann dachte ich, ich würde alle Daten aus meiner lokalen PostgreSQL-Datenbank mit diesem folgenden Befehl löschen
-- Drop everything from the PostgreSQL database.
DO $$
DECLARE
q TEXT;
r RECORD;
BEGIN
-- triggers
FOR r IN (SELECT pns.nspname, pc.relname, pt.tgname
FROM pg_catalog.pg_trigger pt, pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace AND pc.oid=pt.tgrelid
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pt.tgisinternal=false
) LOOP
EXECUTE format('DROP TRIGGER %I ON %I.%I;',
r.tgname, r.nspname, r.relname);
END LOOP;
-- constraints
FOR r IN (SELECT pns.nspname, pc.relname, pcon.conname
FROM pg_catalog.pg_constraint pcon, pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace AND pc.oid=pcon.conrelid
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pcon.contype='f'
) LOOP
EXECUTE format('ALTER TABLE ONLY %I.%I DROP CONSTRAINT %I;',
r.nspname, r.relname, r.conname);
END LOOP;
-- constraints
FOR r IN (SELECT pns.nspname, pc.relname, pcon.conname
FROM pg_catalog.pg_constraint pcon, pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace AND pc.oid=pcon.conrelid
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pcon.contype<>'f'
) LOOP
EXECUTE format('ALTER TABLE ONLY %I.%I DROP CONSTRAINT %I;',
r.nspname, r.relname, r.conname);
END LOOP;
-- indicēs
FOR r IN (SELECT pns.nspname, pc.relname
FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pc.relkind='i'
) LOOP
EXECUTE format('DROP INDEX %I.%I;',
r.nspname, r.relname);
END LOOP;
-- normal and materialised views
FOR r IN (SELECT pns.nspname, pc.relname
FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pc.relkind IN ('v', 'm')
) LOOP
EXECUTE format('DROP VIEW %I.%I;',
r.nspname, r.relname);
END LOOP;
-- tables
FOR r IN (SELECT pns.nspname, pc.relname
FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pc.relkind='r'
) LOOP
EXECUTE format('DROP TABLE %I.%I;',
r.nspname, r.relname);
END LOOP;
-- sequences
FOR r IN (SELECT pns.nspname, pc.relname
FROM pg_catalog.pg_class pc, pg_catalog.pg_namespace pns
WHERE pns.oid=pc.relnamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pc.relkind='S'
) LOOP
EXECUTE format('DROP SEQUENCE %I.%I;',
r.nspname, r.relname);
END LOOP;
-- extensions (only if necessary; keep them normally)
FOR r IN (SELECT pns.nspname, pe.extname
FROM pg_catalog.pg_extension pe, pg_catalog.pg_namespace pns
WHERE pns.oid=pe.extnamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
) LOOP
EXECUTE format('DROP EXTENSION %I;', r.extname);
END LOOP;
-- aggregate functions first (because they depend on other functions)
FOR r IN (SELECT pns.nspname, pp.proname, pp.oid
FROM pg_catalog.pg_proc pp, pg_catalog.pg_namespace pns, pg_catalog.pg_aggregate pagg
WHERE pns.oid=pp.pronamespace
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast')
AND pagg.aggfnoid=pp.oid
) LOOP
EXECUTE format('DROP AGGREGATE %I.%I(%s);',
r.nspname, r.proname,
pg_get_function_identity_arguments(r.oid));
END LOOP;
-- routines (functions, aggregate functions, procedures, window functions)
IF EXISTS (SELECT * FROM pg_catalog.pg_attribute
WHERE attrelid='pg_catalog.pg_proc'::regclass
AND attname='prokind' -- PostgreSQL 11+
) THEN
q := 'CASE pp.prokind
WHEN ''p'' THEN ''PROCEDURE''
WHEN ''a'' THEN ''AGGREGATE''
ELSE ''FUNCTION''
END';
ELSIF EXISTS (SELECT * FROM pg_catalog.pg_attribute
WHERE attrelid='pg_catalog.pg_proc'::regclass
AND attname='proisagg' -- PostgreSQL ≤10
) THEN
q := 'CASE pp.proisagg
WHEN true THEN ''AGGREGATE''
ELSE ''FUNCTION''
END';
ELSE
q := '''FUNCTION''';
END IF;
FOR r IN EXECUTE 'SELECT pns.nspname, pp.proname, pp.oid, ' || q || ' AS pt
FROM pg_catalog.pg_proc pp, pg_catalog.pg_namespace pns
WHERE pns.oid=pp.pronamespace
AND pns.nspname NOT IN (''information_schema'', ''pg_catalog'', ''pg_toast'')
' LOOP
EXECUTE format('DROP %s %I.%I(%s);', r.pt,
r.nspname, r.proname,
pg_get_function_identity_arguments(r.oid));
END LOOP;
-- nōn-default schemata we own; assume to be run by a not-superuser
FOR r IN (SELECT pns.nspname
FROM pg_catalog.pg_namespace pns, pg_catalog.pg_roles pr
WHERE pr.oid=pns.nspowner
AND pns.nspname NOT IN ('information_schema', 'pg_catalog', 'pg_toast', 'public')
AND pr.rolname=current_user
) LOOP
EXECUTE format('DROP SCHEMA %I;', r.nspname);
END LOOP;
-- voilà
RAISE NOTICE 'Database cleared!';
END; $$;
Danach können Sie den Befehl django für Migrationen ausführen
python manage.py makemigrations
python manage.py migrate
Und das wird auf jeden Fall funktionieren. Vielen Dank.