See descriptive Enitity Validation Errors in exception message
By default, Entity Validation Errors are not described in the DbEntityValidationException that is thrown.
If you want those displayed, here is how:
Locate your DbContext object in your project. Overload the SaveChanges() message as follows:
public override int SaveChanges()
{
try
{
return base.SaveChanges();
}
catch (DbEntityValidationException eve)
{
var errorMsg = new StringBuilder(eve.Message + Environment.NewLine);
foreach (var validationResult in eve.EntityValidationErrors)
{
foreach (var error in validationResult.ValidationErrors)
{
errorMsg.Append(validationResult.Entry.Entity + ": ");
errorMsg.Append(error.ErrorMessage + Environment.NewLine);
}
}
// Use the same exception type to avoid downstream bugs with code that catches this
throw new DbEntityValidationException(errorMsg.ToString(), eve.EntityValidationErrors, eve);
}
}
I can see how the decision to not include them by default is good. Doing so could be an information disclosure security issue. However, if wrapped in a WCF service where the the entities are used as the DataContract or POCO objects, then there really isn’t much information additional information provided than what is in the wsdl.
