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Type:
Bug
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Resolution: Works as Designed
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Priority:
Minor - P4
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Affects Version/s: 2.4.2
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Component/s: Serialization
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Environment:VS2015
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An exception of type System.FormatException is thrown, with the following description:
Additional information: An error occurred while deserializing the Settings property of class Application.Models.User: Duplicate element name 'admin'.
The offending code (a test case created to trigger the bug in isolation):
public void TriggerUserBug()
{
var connection = ConfigurationManager.AppSettings["MongoDBConnection"];
var database = ConfigurationManager.AppSettings["DatabaseName"];
var client = new MongoClient(connection);
IMongoDatabase db = client.GetDatabase(database);
IMongoCollection<User> collection = db.GetCollection<User>("users");
var filter = Builders<User>.Filter.Eq("_id", ObjectId.Parse("533ab4de616c6565c9bc0000"));
var result = collection.Find(filter).FirstOrDefault(); // generates the exception
Assert.AreEqual("533ab4de616c6565c9bc0000", result.Id.ToString());
}
The User object declares the sub-document like this:
[BsonElement("settings")]
public BsonDocument Settings { get; set; }
The string "admin" does not appear in the code at all.
The data in the MongoDB sub-document looks like:
"settings" : {
"admin" : {
"ext_number" : "999"
}
},
The string "admin" does not appear anywhere else in the user document (which is very large, which is why I haven't included it here).