修复query数据bug

Author: jarjin

FirServer/FirServer/Manager/DataManager.cs

@@ -73,7 +73,7 @@ public T GetDoc<T>(string tabName, Expression<Func<T, bool>> filter)
         /// <summary>
         /// 组合查询
         /// </summary>
-        public List<T> Query<T>(string tabName, Expression<Func<T, bool>> filter) 
+        public List<T> Query<T>(string tabName, Expression<Func<T, bool>> filter = null) 
         {
             return mongoHelper.Select<T>(tabName, filter);
         }

FirServer/FirServer/Model/BaseModel.cs

@@ -66,7 +66,7 @@ public T GetDoc<T>(Expression<Func<T, bool>> filter)
         /// <summary>
         /// 查询结果集
         /// </summary>
-        public List<T> Query<T>(Expression<Func<T, bool>> filter) 
+        public List<T> Query<T>(Expression<Func<T, bool>> filter = null) 
         {
             if (string.IsNullOrEmpty(tableName) || dataMgr == null)
             {

FirServer/FirServer/Utility/MongoHelper.cs

@@ -100,14 +100,17 @@ public async Task<long> CountAsync<T>(string collectionName, Expression<Func<T,
 
 
         #region Select Function 
-        public List<T> Select<T>(string collectionName, Expression<Func<T, bool>> filter) 
+        public List<T> Select<T>(string collectionName, Expression<Func<T, bool>> filter = null) 
         {
             if (mDatabase == null)
             {
                 throw new Exception("MongoDB database was null!!!");
             }
             var collection = mDatabase.GetCollection<T>(collectionName);
-            var result = collection.Find(filter).ToList<T>();
+            if (filter == null)
+            {
+                return collection.Find(new BsonDocument()).ToList<T>();
+            }         
             return collection.Find(filter).ToList<T>();
         }