EventEntry.ToJson() tracks all properties at changes when Entity.State sets to Modified

Hey Federico 👋

I realize one thing. It may work as expected fine but I don’t think so.

Before we are updating an entity. If we set our entity object’s EntityState as Modified. Audit writes as all the properties into Json’s changes array. Actually, I only changed 1 or 2 property.

Let’s see with an example;

public class Category : AuditableEntity<int>
{
    public string Title { get; set; }

    public string Description { get; set; }

    // .. more prop goes ..
}

// Let's say I retrieved category object from the data source in the category variable
category.Title = "new updated title"; 
// We don't updated any other props.
_context.Entry(category).State = EntityState.Modified;
await _context.SaveChangesAsync()

My expectation to see only category title in the Json’s changes array but all of the category property will be there. 😔

Thanks for the great projects and helps! 🚀🚀🚀

[arslanaybars]

Yes, you are right. But if I don’t set Entity State as modified (I think even if we set it should not break changes), somehow changeTracker.Entries() elements are not set to modified. I also override SaveChanges. If my entity updated I need to know it to update run some internal logic.

But to anyone usage, I solve it by using the following lines before called base.SaveChangesAsync(cancellationToken);

foreach (var e in changedEntity.Properties.Where(x => x.IsModified))
{
    e.CurrentValue = e.CurrentValue ?? "null";
    e.OriginalValue = e.OriginalValue ?? "null";
    e.IsModified = !e.CurrentValue.Equals(e.OriginalValue);
}

I also don’t get it why it is happening. I can close the issue, probably it is a specific case don’t know why?

Thanks for your time.

[thepirat000]

I don’t get it… If you only change the Title property, why would you want to track the unmodified properties?

This should be enough:

var category = context.Categories.FirstOrDefault();
category.Title = "new title";
context.SaveChanges();