{
    "info": {
        "author": "Hang Park",
        "author_email": "hangpark@kaist.ac.kr",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 1 - Planning",
            "Environment :: Web Environment",
            "Framework :: Django",
            "Framework :: Django :: 1.10",
            "Framework :: Django :: 1.11",
            "Framework :: Django :: 2.0",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: BSD License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.5",
            "Programming Language :: Python :: 3.6",
            "Programming Language :: Python :: 3 :: Only"
        ],
        "description": "# django-multi-db-relation\n\n> Queryset optimization supports for multi database spanning relations between Django models.\n\n## Requirements\n\n- Python (>= 3.5)\n- Django (>= 1.10)\n\n## Installation\n\n```sh\npip install django-multi-db-relation\n```\n\n## Usage\n\nFor models\n\n```python\nclass ModelA(models.Model):\n    name = models.CharField(max_length=10)\n\nclass ModelB(models.Model):\n    a = models.ForeignKey(ModelA, on_delete=models.DO_NOTHING)\n\nclass ModelC(models.Model):\n    b = models.ForeignKey(ModelB, on_delete=models.DO_NOTHING, db_constraint=False)\n```\n\nsuppose that `ModelA` and `ModelB` is routed to `db1` and `ModelC` to `db2`.\n\nWe **cannot** run a queryset with `select_related()`.\n\n```python\n>>> ModelC.objects.select_related('b') # Table not found\n```\n\nIn this case, modify `ModelC` like:\n\n```python\nfrom multi_db_relation.mixins import ExternalDbQuerySetMixin\n\n\nclass ModelCQuerySet(ExternalDbQuerySetMixin, models.QuerySet):\n    pass\n\nclass ModelC(models.Model):\n    b = models.ForeignKey(ModelB, on_delete=models.DO_NOTHING, db_constraint=False)\n\n    objects = models.Manager.from_queryset(queryset_class=ModelCQuerySet)()\n\n    class Meta:\n        external_db_fields = ['b']\n```\n\nthen:\n\n```python\n>>> ModelC.objects.select_related('b') # Number of queries is optimized from O(n) to O(1)\n>>> ModelC.objects.select_related('b__a') # Also works well\n```\n\n## License\n\n- See [LICENSE](LICENSE)\n\n",
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        "name": "django-multi-db-relation",
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        "summary": "Django query optimization supports for multi db relations.",
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