How to use dot in field name?

Question

How to use dot in field name ?

I see error in example:

db.test2.insert({ \"a.a\" : \"b\" })

can\'t have . in field names [a.a]

Answer 1

I've only really come across this problem when trying to serialize Dictionaries and such where the offending dot can appear as a key name. Edited to show the references.

The quick and dirty C# approach:

using MongoDB.Bson;
using Newtonsoft.Json.Linq;
using System.Text.RegularExpressions;

public static T Sanitize(T obj)
{
      var str = JObject.FromObject(obj).ToJson();
      var parsed = Regex.Replace(str, @"\.(?=[^""]*"":)", "_");   //i.e. replace dot with underscore when found as a json property name { "property.name": "don't.care.what.the.value.is" }
      return JObject.Parse(parsed).ToObject();
}