Only accept connections from specific node type

[FreshLucas-git]

Hi. Can we set a node that only allows connections from a specific source node? For example, Node A and Node B both connect to the Node C in the following image, but I want Node C to only accept connections from Node A. I'm wondering if we can limit a condition in Node C that only accepts connections from a specific source node such as Node A, so that other nodes cannot connect to it.

[bcakmakoglu]

You can use the isValidConnection prop of handles to validate connections.
There's also an example in the docs.

[FreshLucas-git]

Hi @bcakmakoglu. Thank you for quick reply. I checked this example before. This scenario of example is slight different from my scenario. I hope that I just set one limitation in Node C, instead of using isValidConnection in Node A and Node B. Is that possible to implement it?

[bcakmakoglu]

Validation always happens from the source handle, not the target handle, so you have to pass isValidConnection to whatever source handle you're using at the moment.

Alternatively you can just allow the connection and catch it in onConnect and if you're not happy with the potential connection, just don't create a new edge.