私は自分で MongoDB を学んでいますが、奇妙な状況に陥っています。これがクエリ＃1です
サンプル データセットでを実行する
db.players.find({$or: [{"position":"Left Wing"}, {"position":"Right Wing"}]}).pretty()と、次の結果が得られます。"_id" : ObjectId("57d9a212698d3e0bd0f5a245"), "position" : "Right Wing", "id" : 8465166, "weight" : 200, "height" : "6' 0\"", "imageUrl" : "http://1.cdn.nhle.com/photos/mugs/8465166.jpg", "birthplace" : "Seria, BRN", "age" : 37, "name" : "Craig Adams", "birthdate" : "April 26, 1977", "number" : 27 "_id" : ObjectId("57d9a212698d3e0bd0f5a246"), "position" : "Right Wing", "id" : 8475761, "weight" : 195, "height" : "6' 2\"", "imageUrl" : "http://1.cdn.nhle.com/photos/mugs/8475761.jpg", "birthplace" : "Gardena, CA, USA", "age" : 23, "name" : "Beau Bennett", "birthdate" : "November 27, 1991", "number" : 19 "_id" : ObjectId("57d9a212698d3e0bd0f5a247"), "position" : "Left Wing", "id" : 8471260, "weight" : 202, "height" : "6' 1\"", "imageUrl" : "http://3.cdn.nhle.com/photos/mugs/8471260.jpg", "birthplace" : "Meadow Lake, SK, CAN", "age" : 29, "name" : "Blake Comeau", "birthdate" : "February 18, 1986", "number" : 17 "_id" : ObjectId("57d9a212698d3e0bd0f5a249"), "position" : "Right Wing", "id" : 8471703, "twitterURL" : "https://twitter.com/S9Downie", "weight" : 191, "height" : "5' 11\"", "imageUrl" : "http://1.cdn.nhle.com/photos/mugs/8471703.jpg", "birthplace" : "Newmarket, ON, CAN", "twitterHandle" : "S9Downie", "age" : 28, "name" : "Steve Downie", "birthdate" : "April 03, 1987", "number" : 23 "_id" : ObjectId("57d9a212698d3e0bd0f5a24a"), "position" : "Right Wing", "id" : 8466393, "weight" : 205, "height" : "6' 1\"", "imageUrl" : "http://2.cdn.nhle.com/photos/mugs/8466393.jpg", "birthplace" : "Laval, QC, CAN", "age" : 35, "name" : "Pascal Dupuis", "birthdate" : "April 07, 1979", "number" : 9 "_id" : ObjectId("57d9a212698d3e0bd0f5a24b"), "position" : "Right Wing", "id" : 8471887, "weight" : 189, "height" : "5' 11\"", "imageUrl" : "http://1.cdn.nhle.com/photos/mugs/8471887.jpg", "birthplace" : "Sollentuna, SWE", "age" : 28, "name" : "Patric Hornqvist", "birthdate" : "January 01, 1987", "number" : 72 "_id" : ObjectId("57d9a212698d3e0bd0f5a24c"), "position" : "Left Wing", "id" : 8470543, "weight" : 195, "height" : "6' 0\"", "imageUrl" : "http://3.cdn.nhle.com/photos/mugs/8470543.jpg", "birthplace" : "Regina, SK, CAN", "age" : 35, "name" : "Chris Kunitz", "birthdate" : "September 26, 1979", "number" : 14 "_id" : ObjectId("57d9a212698d3e0bd0f5a24f"), "position" : "Left Wing", "id" : 8474102, "twitterURL" : "https://twitter.com/DP_57", "weight" : 200, "height" : "6' 0\"", "imageUrl" : "http://3.cdn.nhle.com/nhl/en/v3/photos/mugs/8474102.jpg", "birthplace" : "Sherbrooke, QC, CAN", "twitterHandle" : "DP_57", "age" : 26, "name" : "David Perron", "birthdate" : "May 28, 1988", "number" : 39申し訳ありませんが、JSON ファイルのフォーマットは困難です。ブラケットがあった場所として、上の大きなギャップを想定してください。
実行すると
db.players.find({"position":"Left Wing"} || {"position":"Right Wing"}).pretty(),、結果は次のようになります。"_id" : ObjectId("57d9a212698d3e0bd0f5a247"), "position" : "Left Wing", "id" : 8471260, "weight" : 202, "height" : "6' 1\"", "imageUrl" : "http://3.cdn.nhle.com/photos/mugs/8471260.jpg", "birthplace" : "Meadow Lake, SK, CAN", "age" : 29, "name" : "Blake Comeau", "birthdate" : "February 18, 1986", "number" : 17 "_id" : ObjectId("57d9a212698d3e0bd0f5a24c"), "position" : "Left Wing", "id" : 8470543, "weight" : 195, "height" : "6' 0\"", "imageUrl" : "http://3.cdn.nhle.com/photos/mugs/8470543.jpg", "birthplace" : "Regina, SK, CAN", "age" : 35, "name" : "Chris Kunitz", "birthdate" : "September 26, 1979", "number" : 14 "_id" : ObjectId("57d9a212698d3e0bd0f5a24f"), "position" : "Left Wing", "id" : 8474102, "twitterURL" : "https://twitter.com/DP_57", "weight" : 200, "height" : "6' 0\"", "imageUrl" : "http://3.cdn.nhle.com/nhl/en/v3/photos/mugs/8474102.jpg", "birthplace" : "Sherbrooke, QC, CAN", "twitterHandle" : "DP_57", "age" : 26, "name" : "David Perron", "birthdate" : "May 28, 1988", "number" : 39
OR両方とも動作していることを考えると、なぜこの不一致なのですか? 私がそれを理解するのを手伝ってください。
IntelliJ 上の Windows 10/MongoDB