GUID Driver for C #

Question

Having some problems returning requests from Mongo to Id when this is a guide. I have a really stupid test class, its just open Guid Id {get; set}. I create a collection and insert this test class. In the shell, I see it as

{ "_id" : BinData(3,"9q+FwoU/RE2+Iq3w7hK1JA==") } 

Then i try to do

 var query = Query.EQ("Id", Id); 

If I look in the debugger, it displays as

 { "Id" : CSUUID("c285aff6-3f85-4d44-be22-adf0ee12b524") } 

However, it does not return anything. Did I miss something obvious here? Also, note that the shell does not know what CSUUID is .. is there any way to enable this? CentOS server, if it is important ...

Answer 1

Id will be automatically mapped to the name of the reserved primary key _id . You must change your request to

 Query.EQ("_id", Id) 

This should solve your problem.

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Some GUID Information

However, this CSUUID thing is good to understand: it tells you that the driver uses an outdated GUID representation in the C # driver. I believe this is still defaulted, so no need to worry. There are different encodings, as other languages ​​or operating systems have different byte orders.

You can expand the shell to "understand" the various GUID formats, a very useful extension anyway for all kinds of debugging:

https://github.com/mongodb/mongo-csharp-driver/blob/master/uuidhelpers.js

This makes shell debugging easier. Just download js and run mongo using mongo --shell uuidhelpers.js .