Question

我最近开始使用MongoDB作为SSIS中的源（使用C＃驱动程序）。我是MongoDB和C＃的新手。当我没有嵌套文档时，下面的语句对我有用：

git cherry-pick <commit-hash of version 15 from testing branch>

现在，我获得了嵌套文档。我能够创建java脚本，它可以与MongoDB本身一起使用

var query = Query.And(Query.Or(Query.GT("CreatedOn",maxUpdatedOnBSON), Query.GT("UpdatedOn", maxUpdatedOnBSON)), 
            Query.Or(Query.LT("CreatedOn", cutoffDate), Query.LT("UpdatedOn", cutoffDate)),Query.In("TestType", testTypes) );  

    MongoCursor<BsonDocument> toReturn = collection.Find(query);

在C＃中，据我所知，我必须使用聚合而不是查找，但我无法将此代码转换为C＃。我仍然有选择标准和放松。

你能帮忙吗？

Answer 1

因为没有发布任何收藏模板，我附上的内容类似于您要查找的内容。这有帮助吗？

       var builder = Builders<BsonDocument>.Filter;
       //and operator can be used similar to below by using operator "&" or builder.And. 

        var filter = builder.Eq("state", "nj") | builder.Eq("state", "CO"); 
        var filter2 = builder.Eq("pop", 6033) | builder.Eq("city", "nyc");
        filter = builder.And(filter, filter2);
        var pipeline = grades.Aggregate()
            .Unwind(x => x["Items"]) 
          .Match(filter);


        var list = pipeline.ToList();

        foreach (var item in list)
        {
            //do something
        }

Answer 2

我得到了帮助并分享了解决方案：

 //Create matching criteria used in the aggregation pipeline to bring back only the specified documents based on date range

    var match = new BsonDocument("$match",
            new BsonDocument("$and",
                new BsonArray()
                .Add(new BsonDocument("$or", new BsonArray().Add(new BsonDocument("CreatedOn", new BsonDocument("$gt", maxUpdatedOnBSON))).Add(new BsonDocument("UpdatedOn", new BsonDocument("$gt", maxUpdatedOnBSON)))))
                .Add(new BsonDocument("$or", new BsonArray().Add(new BsonDocument("CreatedOn", new BsonDocument("$lt", cutoffDate))).Add(new BsonDocument("UpdatedOn", new BsonDocument("$lt", cutoffDate)))))));

    //create the arguments to pass to the $unwind method of the aggregation
    var unwindargs = new BsonDocument("path", "$LineItems");
    unwindargs.Add("includeArrayIndex", "arrayIndex");

    //create the unwind stage and add the arguments
    var unwind = new BsonDocument("$unwind", unwindargs);

    //create a new pipeline and gather the results 
    var pipeline = new[] { match, unwind };
    var mongoArgs = new AggregateArgs { Pipeline = pipeline };

    var toReturn = collection.Aggregate(mongoArgs).ToList();

带有$ unwind的MongoDB SSIS

2 个答案: