[英]MongoDB not querying
嗨,我試圖通過使用Facebook ID列表作為參數來查詢我的Mongo數據庫,以便返回具有相應帳戶的用戶列表。 該方法在Unity編輯器中工作正常,但是當我在iOS上運行時,我得到一個構造函數錯誤(我已經設置了一個空白的默認構造函數以解決問題,但它仍然無效)
初始方法
public void FetchData()
{
//data = Mongo.Instance.players.FindAll().ToList();
if (FB.IsLoggedIn)
{
FB.API("me/friends", HttpMethod.GET, FriendsHighscoreHndlr);
}
}
回調方法
public void FriendsHighscoreHndlr (IGraphResult FBresult){
var dict = Json.Deserialize(FBresult.ToString()) as Dictionary<string,object>;
var friendList = new List<object>();
friendList = (List<object>)(dict["data"]);
int _friendCount = friendList.Count;
Debug.Log("Found friends on FB, _friendCount ... " +_friendCount);
List<string> friendIDsFromFB = new List<string>();
for (int i=0; i<_friendCount; i++) {
string friendFBID = getDataValueForKey( (Dictionary<string,object>)(friendList[i]), "id");
string friendName = getDataValueForKey( (Dictionary<string,object>)(friendList[i]), "name");
Debug.Log( i +"/" +_friendCount +" " +friendFBID +" " +friendName);
friendIDsFromFB.Add(friendFBID);
}
//friendIDsFromFB.Add(AccessToken.CurrentAccessToken.UserId);
var query = Query.In("facebookID", BsonArray.Create(friendIDsFromFB));
//Debug.Log(query);
data = Mongo.Instance.players.Find(query).ToList();
}
關鍵方法的數據值
private string getDataValueForKey(Dictionary<string, object> dict, string key) {
object objectForKey;
if (dict.TryGetValue(key, out objectForKey)) {
return (string)objectForKey;
} else {
return "";
}
}
返回查詢結果
{
"_id" : ObjectId("XXXXXX"),
"facebookID" : "XXXXXXXXXXXXXX",
"name" : "John Doe",
"highScore" : 40501
}
您是否嘗試過使用Mongo .NET驅動程序的過濾器?
我建議嘗試類似下面的例子。 (注意:此事件是在定義為集合的預定義對象上觸發的。)
var filter = Builders<Object>.Filter.Eq(obj => obj.attribute, List<IDs>);
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