Error messages returned from Web API method are omitted in non-dev environment

Question

I have a Web API controller POST method that behaves fine locally and on the testing server. If everything goes well it returns:

new HttpResponseMessage( Htt         


        

Answer 1

Take a look at this MSDN post on the HttpConfiguration.IncludesErrorDetailPolicy:

In your Global.asax:

var config = GlobalConfiguration.Configuration;
config.IncludeErrorDetailPolicy = IncludeErrorDetailPolicy.Always;

I have used this configuration property to force error messages to include details.