Erste lauffähige Version
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"""Wartet, bis die DB Connections annimmt."""
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import time
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from django.core.management.base import BaseCommand
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from django.db import OperationalError, connections
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class Command(BaseCommand):
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help = "Wartet, bis die Standard-DB verfügbar ist."
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def add_arguments(self, parser):
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parser.add_argument("--timeout", type=int, default=60)
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def handle(self, *args, **opts):
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deadline = time.time() + opts["timeout"]
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while time.time() < deadline:
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try:
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connections["default"].ensure_connection()
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self.stdout.write(self.style.SUCCESS("DB ist bereit."))
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return
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except OperationalError:
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self.stdout.write("warte auf DB...")
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time.sleep(2)
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self.stderr.write(self.style.ERROR("DB nach Timeout nicht erreichbar."))
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raise SystemExit(1)
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