Can create an edge with any "type" through API call but could not see it in the UI

Xiaofeng,

Looking at XiaofengTestDataModel, I don’t exactly know between which 2 types you are relating (creating edge for). 

There are 2 types of relations 
If your model looked something like:

type SimulationModel {
  name: String!
  simulator: Simulator
  nodes: [Node]
}

type Simulator {
  name: String!
}

type Node {
  name: String!
}

You would need to create a Simulator instance first (I presume you have that).  Let’s assume that the id of a Simulator node instance is “simulator-s”

A SimulationModel Instance creation would look something like this:

        {
            "instanceType": "node",
            "existingVersion": 1,
            "space": "your-space",
            "externalId": "sim-model-id-x",
            "sources": [
                {
                    "source": {
                        "type": "view",
                        "space": "your-space",
                        "externalId": "SimulationModel",
                        "version": "1"
                    },
                    "properties": {
                        "name": "a name"
                        "simulator": {
                            "space": "your-space",
                            "externalId": "simulator-s"
                        }
                    }
                }
            ]
        }

The Nodes Edge instance item should look something like this:

        {
            "instanceType": "edge",
            "existingVersion": 1,
            "space": "your-space",
            "externalId": "unique edge id",
            "type": {
                "space": "your-space",
                "externalId": "SimulationModel.nodes"
            },
            "startNode": {
                "space": "your-space",
                "externalId": "sim-model-id-x"
            },
            "endNode": {
                "space": "your-space",
                "externalId": "node-id-123"
            }
        }

Hope this helps,

Jason

Hi Jason,

Thanks for your reply. As you may see, I created an instance for SimulationModel and also an instance for Simulator and would like to create a direct relation between those two instances. I tried to use “SimulationModel.simulator” and “SimulationModel.Simulator” or any string as the “externalId” of the “type” when creating the edge but seems no matter what I used a new edge was created successfully.

Request:

{
    "items": [
        {
            "instanceType": "node",
            "space": "XiaofengTest",
            "externalId": "externalId:simmodel1",
            "sources": [
                {
                    "source": {
                        "type": "view",
                        "space": "XiaofengTest",
                        "externalId": "SimulationModel",
                        "version": "1"
                    },
                    "properties": {
                        "modelName": "firstSimulationModelName",
                        "modelId": "xxx-xxx-xxx-xxx-xxx"
                    }
                }
            ]
        },
        {
            "instanceType": "node",
            "space": "XiaofengTest",
            "externalId": "externalId:simulator1",
            "sources": [
                {
                    "source": {
                        "type": "view",
                        "space": "XiaofengTest",
                        "externalId": "Simulator",
                        "version": "1"
                    },
                    "properties": {
                        "type": "OLGA",
                        "version": "2021.1",
                        "name": "FASimulator"
                    }
                }
            ]
        },
        {
            "instanceType": "edge",
            "space": "XiaofengTest",
            "externalId": "externalId:edge4",
            "type": {
                "space": "XiaofengTest",
                "externalId": "SimulationModel.simulator"
            },
            "startNode": {
                "space": "XiaofengTest",
                "externalId": "externalId:simulator1"
            },
            "endNode": {
                "space": "XiaofengTest",
                "externalId": "externalId:simmodel1"
            }
        }
    ],
    "autoCreateStartNodes": false,
    "autoCreateEndNodes": false,
    "skipOnVersionConflict": false,
    "replace": false
}

Response:

{
    "items": [
        {
            "instanceType": "node",
            "version": 1,
            "wasModified": false,
            "space": "XiaofengTest",
            "externalId": "externalId:simmodel1",
            "createdTime": 1677858518363,
            "lastUpdatedTime": 1677858518363
        },
        {
            "instanceType": "node",
            "version": 1,
            "wasModified": false,
            "space": "XiaofengTest",
            "externalId": "externalId:simulator1",
            "createdTime": 1677858518363,
            "lastUpdatedTime": 1677858518363
        },
        {
            "instanceType": "edge",
            "version": 1,
            "wasModified": true,
            "space": "XiaofengTest",
            "externalId": "externalId:edge4",
            "createdTime": 1678174622351,
            "lastUpdatedTime": 1678174622351
        }
    ]
}

However, in the UI those two instance were not connected and the “simulator” is null

Could you help me find out what was missing in my request?

Aha, I see. So a one to one relation or “Direct” relation does not need an Edge. Now I am able to create a “Direct” relation between those two instances following your suggestion. Thanks a lot!