Node Connectors Disappearing

mzjensen · October 18, 2021, 6:48pm

I’ve created some dropdown nodes for my package and they are disconnecting when saving/reopening a graph. Here’s what gets recorded in the log.

Any advice? I inherited from DSDropDownBase like this example and made sure to include the JSON constructor, but I’m wondering if I still missed something to make sure that the ports get serialized.

github.com

DynamoDS/DynamoSamples/blob/master/src/SampleLibraryUI/Examples/DropDown.cs

using System.Collections.Generic;
using CoreNodeModels;
using Dynamo.Graph.Nodes;
using Dynamo.Utilities;
using ProtoCore.AST.AssociativeAST;
using Newtonsoft.Json;

namespace SampleLibraryUI.Examples
{
    [NodeName("Drop Down Example")]
    [NodeDescription("An example drop down node.")]
    [IsDesignScriptCompatible]
    public class DropDownExample : DSDropDownBase
    {
        public DropDownExample() : base("item"){}

        // Starting with Dynamo v2.0 you must add Json constructors for all nodeModel
        // dervived nodes to support the move from an Xml to Json file format.  Failing to
        // do so will result in incorrect ports being generated upon serialization/deserialization.
        // This constructor is called when opening a Json graph. We must also pass the deserialized

This file has been truncated. show original

By inheriting from DSDropDownBase, does that mean that I don’t have to register the ports separately?

github.com

DynamoDS/DynamoSamples/blob/master/src/SampleLibraryUI/Examples/SliderCustomNodeModel.cs#L107

    
      
              // you can populate the InPorts and the OutPorts
              // collections with PortData objects describing your ports.
          
          
    // Nodes can have an arbitrary number of inputs and outputs.
              // If you want more ports, just create more PortData objects.
              OutPorts.Add(new PortModel(PortType.Output, this, new PortData("upper value", "returns a 0-10 double value")));
              OutPorts.Add(new PortModel(PortType.Output, this, new PortData("lower value", "returns a 0-100 double value")));
          
          
    // This call is required to ensure that your ports are
              // properly created.
              RegisterAllPorts();
          
          
    // The arugment lacing is the way in which Dynamo handles
              // inputs of lists. If you don't want your node to
              // support argument lacing, you can set this to LacingStrategy.Disabled.
              ArgumentLacing = LacingStrategy.Disabled;
          
          
    // Set initial slider value.
              sliderValue = 4;
          }

Michael_Kirschner2 · October 18, 2021, 9:19pm

please share your code

mzjensen · October 19, 2021, 4:44pm

I figured it out. I was just missing the inPorts and outPorts parameters in the method signature for the base class. So I had:

public DropDownBase(string outputName, IEnumerable<PortModel> inPorts, IEnumerable<PortModel> outPorts) : base(outputName)

instead of:

public DropDownBase(string outputName, IEnumerable<PortModel> inPorts, IEnumerable<PortModel> outPorts) : base(outputName, inPorts, outPorts)

Turns out all I needed was a good night of sleep and fresh eyes

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Node Connectors Disappearing

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