jquery - WebAPI - Passing JSON of derived class -

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i using kendo ui,entity framework, , angularjs , trying serialize derived class type in kendo grid , send webapi method. have follow model association:

class freq_pool<---- base class class pool_faa:freq_pool<----derived class class frequency(contains freq_pool object)

i using kendo ui model follows:

model: {                          id: "id",                         fields: {                              frequency: { type: "string" },                              freq_pool: {                                 $type: 'domainmodelmodule.pool_faa, domainmodelmodule',                                // type: "object",                                 defaultvalue: {}                             }                          }                     } ....  $("#faafreqgrid").kendogrid({             datasource: faads,              columns: [              { field: "frequency", editor: categorydropdowneditor, title: "frequency test", format: "{0:c}", width: "120px" },                  { field: "freq_pool.faadesignator", title: "faa designator", format: "{0:c}", width: "120px" },

faadesignator belongs derived class pool_faa. works 100% fine when have manually created row in db. creation part in code not working.

i using right typename handling in web api config based on have read:

  var json = config.formatters.jsonformatter;         json.serializersettings.preservereferenceshandling = newtonsoft.json.preservereferenceshandling.objects;         json.serializersettings.referenceloophandling = referenceloophandling.ignore;            json.serializersettings.typenamehandling = typenamehandling.auto; //this needed casting         json.serializersettings.typenameassemblyformat = system.runtime.serialization.formatters.formatterassemblystyle.full;         config.formatters.remove(config.formatters.xmlformatter);

now still unable cast freq_pool pool_faa in webapi method:

    [responsetype(typeof(frequency))]     public ihttpactionresult postfrequency([frombody]frequency testfreq)     {          frequency ftest = new frequency();         ftest.freq_pool = new pool_faa();                      pool_faa sdgsdg = (pool_faa)ftest.freq_pool;//works when manually created          pool_faa pool = (pool_faa)testfreq.freq_pool;//throws exception     }

as saw, used $type establish type should cast to, not seem working.

i noticed $type not appearing in stringified json:

{"id":0,"frequency":"","freq_pool":{"faadesignator":"sdfgsfdg","datefilled":"dfg","duedate":"fhg","released":"sdfh","releaseddate":"dsfh","comments":"sdfh"},

but including don't know why excluding it. best guess why isn't working. using angular , kendo, , since variable inside kendo model thought might excluding $type or something.

any ideas? thanks.

when switched model-first code-first, didn't explicitly use tpt inheritance. after switching tpt tph inheritance solved.


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