Created
June 9, 2016 17:51
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NCMBでunion all的なことができないか試した
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| //欲しいデータ | |
| //SQLで書くとこんなかんじ。これをNCMBで再現したい。 | |
| //select level,time from TestClass where level = 2 order by time desc limit 3 | |
| //union all | |
| //select level,time from TestClass where level = 3 order by time desc limit 3 | |
| //union all | |
| //select level,time from TestClass where level = 4 order by time desc limit 3 | |
| //union all | |
| //select level,time from TestClass where level = 5 order by time desc limit 3 | |
| //union all | |
| //select level,time from TestClass where level = 6 order by time desc limit 3; | |
| //結果：Orで結合できるのはあくまでWhere条件のみなので、orderbyやlimitが入っていると結合できないみたい？ | |
| using UnityEngine; | |
| using NCMB; | |
| using System.Collections.Generic; | |
| using System; | |
| public class ncmbtest : MonoBehaviour | |
| { | |
| public void Send () | |
| { | |
| //以下を50回押して250レコード作成したデータがある | |
| // for (int lv = 2; lv <= 6; lv++) { | |
| // float time = Random.Range (0f, 1f) * 60.0f; | |
| // NCMBObject testClass = new NCMBObject ("TestClass"); | |
| // testClass ["level"] = lv; | |
| // testClass ["time"] = time; | |
| // testClass.SaveAsync (); | |
| // } | |
| //各レベルでTop3を取得するクエリ | |
| List<NCMBQuery<NCMBObject>> queries = new List<NCMBQuery<NCMBObject>> (); | |
| queries.Add (CreateTop3Query (2)); | |
| queries.Add (CreateTop3Query (3)); | |
| queries.Add (CreateTop3Query (4)); | |
| queries.Add (CreateTop3Query (5)); | |
| queries.Add (CreateTop3Query (6)); | |
| //全クエリをor結合 | |
| NCMBQuery<NCMBObject> mainQuery = NCMBQuery<NCMBObject>.Or (queries); | |
| mainQuery.FindAsync ((List<NCMBObject> objList, NCMBException e) => { | |
| if (e != null) { | |
| //検索失敗時の処理 | |
| Debug.Log ("失敗"); | |
| } else { | |
| //Scoreが7のオブジェクトを出力 | |
| foreach (NCMBObject obj in objList) { | |
| Debug.Log (string.Format ("level:{0}, time:{1}, objId:{2}", obj ["level"], obj ["time"], obj.ObjectId)); | |
| } | |
| } | |
| }); | |
| } | |
| private NCMBQuery<NCMBObject> CreateTop3Query (int level) | |
| { | |
| NCMBQuery<NCMBObject> query = new NCMBQuery<NCMBObject> ("TestClass"); | |
| query.WhereEqualTo ("level", level); | |
| // query.OrderByDescending ("time"); //これを指定するとOrメソッドで結合できないっぽい？ | |
| // query.Limit = 3; // | |
| return query; | |
| } | |
| } |
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