{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fy0m0r.hateblo.jp%2Fentry%2F20120613%2F1339589785\" title=\"Django\u306eQuerySet\u3067SQL\u306e IS NULL \u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5 - \u30e1\u30e2\u7f6e\u304d\u5834\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","categories":["python","django","memo"],"description":"Django\u3055\u308f\u3063\u3066\u3066\u3001\u300cIS NULL\u300d\u3063\u3066Queryset\u3067\u3069\u3046\u3084\u308b\u3093\u3060\u3063\u3051\u3001\u3068\u601d\u3063\u3066\u8abf\u3079\u305f\u306e\u3067\u30e1\u30e2\u3057\u3066\u304a\u304f \u4f8b\u3048\u3070\u4ee5\u4e0b\u306eBook\u30e2\u30c7\u30eb\u304c\u3042\u308b\u3068\u3057\u3066 class City(models.Model): name = models.CharField(max_length=30) class Person(models.Model): hometown = models.ForeignKey(City) name = models.CharField(max_length=100) class Book(models.Model): author = models.ForeignKey(Pe\u2026","blog_url":"https://y0m0r.hateblo.jp/","image_url":null,"height":"190","published":"2012-06-13 21:16:25","blog_title":"\u30e1\u30e2\u7f6e\u304d\u5834","provider_name":"Hatena Blog","title":"Django\u306eQuerySet\u3067SQL\u306e IS NULL \u3092\u8868\u73fe\u3059\u308b\u65b9\u6cd5","version":"1.0","url":"https://y0m0r.hateblo.jp/entry/20120613/1339589785","author_name":"yuheiomori0718","author_url":"https://blog.hatena.ne.jp/yuheiomori0718/","type":"rich","width":"100%"}