新增数据库 联表查询支持

lib/base/database/impl/MongoDb.dart

@@ -1,5 +1,3 @@
-import 'dart:io';
-
 import 'package:EasyDartModule/base/database/DataBase.dart';
 import 'package:mongo_dart/mongo_dart.dart';
 
@@ -52,7 +50,13 @@ class MongoDb implements DataBase {
     if (condition == null) {
       return await getCollection(table).find().toList();
     }
-    return await getCollection(table).find(condition).toList();
+    if (condition is AggregationPipelineBuilder) {
+      return await getCollection(table)
+          .aggregateToStream(condition.build())
+          .toList();
+    } else {
+      return await getCollection(table).find(condition).toList();
+    }
   }
 
   @override