When Entity Framework attempts to save an entity and the validation fails, db.SaveChanges() will throw a generic exception.
You can use KissLogConfiguration.Options.AppendExceptionDetails handler to intercept the validation exception and log the validation errors.
private static void ConfigureKissLog()
{
KissLogConfiguration.Options
.AppendExceptionDetails((Exception ex) =>
{
StringBuilder sb = new StringBuilder();
if (ex is System.Data.Entity.Validation.DbEntityValidationException dbException)
{
sb.AppendLine(">>> Validation exceptions:");
foreach (var error in dbException.EntityValidationErrors.SelectMany(p => p.ValidationErrors))
{
string message = string.Format("Field: {0}, Error: {1}", error.PropertyName, error.ErrorMessage);
sb.AppendLine(message);
}
}
return sb.ToString();
});
KissLogConfiguration.Listeners
.Add(new LocalTextFileListener("logs", FlushTrigger.OnFlush));
}
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