Additional data in Filter

[kacper]

Hello!

I have m:n relation. In the relation selection I want to add a filter that will show me only those entities that are not already connected, how do I do it?
I wanted to add an Espo\Core\Select\Primary\Filter, however, the parent ID is not injected into it, and as a result I am not able to find the relation in the pivot table.
Is it at all possible to inject into SelectBuilder from Filter something more than just the entity by which we filter?

[a.slyzhko]

You need to selectHandler for frontend part. Here is example of my implementation of such functionality

define([], () => {
  return class {
    getFilters(model) {
      let advanced = {};

      if (model.id) {
        let nameHash = {};
        nameHash[model.id] = model.get('name');

        advanced.linkA = {
          type: 'notLinkedWith',
          field: 'linkA',
          value: [model.id],
          data: {
            type: 'noneOf',
            nameHash: nameHash
          },
        };

      }

      return Promise.resolve({
        advanced: advanced,
      });
    }

  }
});​ 

Then define metadata ->clientDefs -> your entity type -> relationshipPanels -> linkA -> selectHandler -> this js script

And do the same for entity A but change linkA with linkB