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65 lines
1.9 KiB
65 lines
1.9 KiB
from django.core.management.base import BaseCommand
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from django.db import connection
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def _pg(cursor):
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cursor.execute("""
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CREATE OR REPLACE FUNCTION update_alert_after()
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RETURNS trigger AS $update_alert_after$
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BEGIN
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IF NEW.last_ping IS NOT NULL THEN
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NEW.alert_after := NEW.last_ping + NEW.timeout + NEW.grace;
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END IF;
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RETURN NEW;
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END;
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$update_alert_after$ LANGUAGE plpgsql;
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DROP TRIGGER IF EXISTS update_alert_after ON api_check;
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CREATE TRIGGER update_alert_after
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BEFORE INSERT OR UPDATE OF last_ping, timeout, grace ON api_check
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FOR EACH ROW EXECUTE PROCEDURE update_alert_after();
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""")
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def _mysql(cursor):
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cursor.execute("""
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DROP TRIGGER IF EXISTS update_alert_after;
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CREATE TRIGGER update_alert_after
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BEFORE UPDATE ON api_check
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FOR EACH ROW SET NEW.alert_after = NEW.last_ping + INTERVAL (NEW.timeout + NEW.grace) MICROSECOND;
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""")
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def _sqlite(cursor):
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cursor.execute("""
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DROP TRIGGER IF EXISTS update_alert_after;
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""")
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cursor.execute("""
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CREATE TRIGGER update_alert_after
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AFTER UPDATE OF last_ping, timeout, grace ON api_check
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FOR EACH ROW BEGIN
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UPDATE api_check
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SET alert_after = datetime(strftime('%s', last_ping) + timeout/1000000 + grace/1000000, 'unixepoch')
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WHERE id = OLD.id;
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END;
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""")
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class Command(BaseCommand):
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help = 'Ensures triggers exist in database'
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def handle(self, *args, **options):
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cursor = connection.cursor()
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if connection.vendor == "postgresql":
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_pg(cursor)
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return "Created PostgreSQL trigger"
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if connection.vendor == "mysql":
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_mysql(cursor)
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return "Created MySQL trigger"
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if connection.vendor == "sqlite":
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_sqlite(cursor)
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return "Created SQLite trigger"
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