database migration - How do I migrate my existing RavenDB store values so queries continue to work? -

i have object lives in raven store:

public class aumobilenumber : valueobject {     private const string validvalueregex = @"^(\+61|61|0)?4[0-9]{8}$";      public aumobilenumber(string value)     {         value = (value ?? string.empty).replace(" ", "");         if (!regex.ismatch(value, validvalueregex))             throw new invalidoperationexception("the number supplied not valid au mobile. +61400555123, 61 400 555 123, 0400555123, 400 555 123 valid.");         value = "+61" + value.substring(value.indexof("4"), value.length - value.indexof("4"));     }      public string value { get; private set; }      public override string tostring()     { return value; } } 

this current version of type. previous version had line

value = value.substring(value.indexof("4"), value.length - value.indexof("4")); 

instead of one

value = "+61" + value.substring(value.indexof("4"), value.length - value.indexof("4")); 

so might imagine had lot of in db old version of code:

{   "value": "422601983" } 

when created new object in store (that used aumobilenumber) this:

{   "value": "+61422601983" } 

this fine until queries had predicates based on value of aumobilenumber started fail. or rather, not return expected results.

so thought "migrate" data 1 of these:

class aumobilenumberincludesplus61 : idocumentconversionlistener {     const long version = 201309030814;      public void entitytodocument(string key, object entity, ravenjobject document, ravenjobject metadata)     {         var m = entity aumobilenumber;         if (m == null)             return;          metadata["customer-schema-version"] = version;         document["value"] = m.tostring();     }      public void documenttoentity(string key, object entity, ravenjobject document, ravenjobject metadata)     {         var m = entity aumobilenumber;         if (m == null)             return;         if (metadata.value<long>("customer-schema-version") >= version)             return;          entity = new aumobilenumber(document.value<string>("value"));     } } 

the problem here debugged , execution never seemed reach past return; guard clauses.

how protectively migrate numbers * +61* 1 of these idocumentconversionlisteners or doing wrong?

i've attempted write test show how broken requires hav json previous form of code.. way think 1 if insert raven store raw json , don't know how that.

any ideas?

it seems answer may patching. more discussion here: https://groups.google.com/forum/#!searchin/ravendb/migrate/ravendb/xkhpbfile48/khj8jmpcej4j