{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fohbarye.hatenablog.jp%2Fentry%2F2015%2F09%2F03%2F092230\" title=\"9/2\u5b66\u3093\u3060\u3053\u3068 / MongoDB@dotinstall - valid,invalid\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"ohbarye","version":"1.0","blog_url":"https://ohbarye.hatenablog.jp/","width":"100%","author_url":"https://blog.hatena.ne.jp/ohbarye/","title":"9/2\u5b66\u3093\u3060\u3053\u3068 / MongoDB@dotinstall","categories":["2015\u590f","MongoDB"],"provider_url":"https://hatena.blog","type":"rich","height":"190","description":"MongoDB # \u7d22\u5f15 # \u8ffd\u52a0 > db.users.ensureIndex({ score: 1 }) { \"createdCollectionAutomatically\" : false, \"numIndexesBefore\" : 1, \"numIndexesAfter\" : 2, \"ok\" : 1 } # \u4e00\u89a7 > db.users.getIndexes() [ { \"v\" : 1, \"key\" : { \"_id\" : 1 }, \"name\" : \"_id_\", \"ns\" : \"mydb.users\" }, { \"v\" : 1, \"key\" : { \"score\" : 1 }, \"n\u2026","blog_title":"valid,invalid","image_url":null,"provider_name":"Hatena Blog","published":"2015-09-02 23:30:00","url":"https://ohbarye.hatenablog.jp/entry/2015/09/03/092230"}