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Immutable entities with Raven DB

Whenever you are trying to use a non-default constructor for your entity, do the following to avoid falling into serialization problems with JSON.Net and raven:

  • add a private constructor ... even if it is empty
  • Ensure every readonly property has a "Private setter" on it ... else it won't get populated
  • Use a custom Json resolver like this one:

    public class PrivatePropertySetterResolver : DefaultContractResolver
    {
       protected override JsonProperty CreateProperty(JsonObjectContract contract, MemberInfo member)
       {
           var prop = base.CreateProperty(contract, member);
           if (!prop.Writable)
           {
               var property = member as PropertyInfo;
               if (property != null)
               {
                   var hasPrivateSetter = property.GetSetMethod(true) != null;
                   prop.Writable = hasPrivateSetter;
               }
           }
           return prop;
       }
    }