在客户端启动多重查询会抛出解析器错误 [英] Starting multiquery in client throws parser error

问题描述

我在c＃SDK中遇到以下问题：当我尝试在我的桌面应用程序中运行以下字符串（搜索对共同的朋友的ID）的多重查询时，我得到一个解析器错误：

I have a following problem in c# SDK: when I try to run multiquery in my desktop application with following string (searching for pairs of IDs of mutual friends) I get a parser error:

string strCommonFriendsQuery = "{
        \"user_friends\":\"SELECT uid2 FROM friend WHERE uid1 = me()\", 
        \"mutual_friends\":\"SELECT uid1, uid2 FROM friend WHERE uid1 IN (SELECT uid2 FROM   #user_friends) AND uid2 IN (SELECT uid2 FROM #user_friends)\"
        }";

        fb.Query(strCommonFriendsQuery);

解析器错误：位置0的意外{

如果我将它粘贴到
http://developers.facebook.com/docs/reference/rest/fql.multiquery/
但不在
http://developers.facebook.com/docs/reference/rest/fql .query /
所以问题是我需要启动它作为多查询而不是查询 - 现在我想问的是：

The same string (without the escape sequences before quotation marks) works if I paste it to http://developers.facebook.com/docs/reference/rest/fql.multiquery/ but not in http://developers.facebook.com/docs/reference/rest/fql.query/ so the problem is that I need to launch it as multiquery and not as a query - now what I would like to ask is:

是否可以使用SDK的Facebook.FacebookClient.Query 函数以某种方式处理多查询，还是要写一个这样做的函数？据了解，我唯一需要改变的地方就是连接到的地址。如果是这样，可以在下一个SDK版本中添加吗？

Is it possible to somehow process multi-query using the Facebook.FacebookClient.Query function of the SDK or do I have to write a function which would do that? As I understand the only thing I would need to change is the address to which it connects to. If so, could it be added in the next SDK version?

推荐答案

第一个查询，例如问题中的一个，请执行以下操作：

To do a multiquery with a reference to the first query, such as the one in the question, do as follows:

//note: queries begin from 0, not from 1
string query0 = "SELECT uid2 FROM friend WHERE uid1 = me()";
string query1 = "SELECT uid1, uid2 FROM friend WHERE uid1 IN (SELECT uid2 FROM #query0) AND uid2 IN (SELECT uid2 FROM #query0)";

dynamic result = fb.Query(query0, query1);

为了回答这个问题，我从这里得到启发（必须弄清楚查询从0开始）： 如何在C＃SDK中使用fql.multiquery

To answer this, I got inspired from here (had to figure out that queries start from 0): How to use fql.multiquery with C# SDK

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