Nullreference exception when adding link model target/source ports

[AlmightyLks]

For some reason the following code throws a NRE Am I doing something wrong?

            Diagram.Nodes.Add(current);

            if (parent is not null)
            {
                var link = new LinkModel(parent, current)
                {
                    TargetMarker = LinkMarker.Arrow
                };
                link.SetSourcePort(parent.GetPort(PortAlignment.Bottom));
                link.SetTargetPort(current.GetPort(PortAlignment.Top));
                Diagram.Links.Add(link);
            }

Stacktrace:

   at Blazor.Diagrams.Core.Layers.LinkLayer.OnItemAdded(BaseLinkModel link)
   at Blazor.Diagrams.Core.BaseLayer`1.Add(T item)
   at ForkHierarchy.Pages.Index.<RenderNodeAsync>d__24.MoveNext()

Checking whether I am adding a null value to SetSource/TargetPort, shows me that they do have values:

[AlmightyLks]

Oh and the reason why I suspect the source / target port setters is that it doesnt occur when not setting them:

[AlmightyLks]

Digging into this:

[zHaytam]

Hello, what version are you using?

[AlmightyLks]

Latest stable release, 2.1.6

Debugging the current master branch source to investigate

[AlmightyLks]

When Node#GetPort(), shouldn't the returning Port's parent be the Node I used it on? ^^

[zHaytam]

Is there a possibility SourceNode is null? Even though it seems impossible, since its being set in https://github.com/Blazor-Diagrams/Blazor.Diagrams/blob/master/src/Blazor.Diagrams.Core/Models/Base/BaseLinkModel.cs#L70

[zHaytam]

When Node#GetPort(), shouldn't the returning Port's parent be the Node I used it on? ^^

Interesting. Can you show me how are you creating these nodes and ports?

[AlmightyLks]

I think this is the only place where I create both, the node models and the ports

[zHaytam]

The type of SourcePort is NodePort? This is very wierd... The only way Parent could be null is if you pass null to it. Cna you show me the NodePort class?

[AlmightyLks]

Oh, funny thing. I had this in my portmodel

Is a Port's Parent the node's parent or is a Port's Parent the node itself?

[zHaytam]

A port's parent is the node itself. A node doesn't have a parent (at least in the library, so that might be your own property?)

[AlmightyLks]

Would make sense, yeah 😄

[AlmightyLks]

One more question related to this feature It isn't showing any links at all now 😄

Am I using it right?

[zHaytam]

I'll need more information. Firstly, how are you rendering your ports?

[AlmightyLks]

Oh! I didn't know you had to add a PortRenderer to the custom node razor file! 😄 My bad

With this all my questions in this regards were answered. Thanks