I have a category collection and a module collection, both of these have a technologies field (relationship field with hasMany option for a different collection). In my module field, I want to have a category field which automatically filters the available categories by the technologies of the module.

My main idea is to write a custom function that maps over the technologies of the module and checks if the technology is in the array of the categories' technology field and combine it with the OR clause.

I am honestly not sure if that is a viable solution and maybe there is something simpler, so if anybody has an idea it would be cool to hear it. Thanks in advance

jarrod_not_jared
2 years ago
Have you seen the filterOptions property on relationship fields? It might be just what you are looking for
https://payloadcms.com/docs/fields/relationship#filtering-relationship-options

davedamage2 years ago

Yeah, that's what I am using. Sorry for not mentioning that

    {
      name: 'category',
      label: 'Themenblock',
      type: 'relationship',
      required: true,
      relationTo: 'categories',
      filterOptions: ({ data }) => {
        const query = data?.technologies?.map((id) => ({
          technologies: {
            in: id,
          },
        }));
        return {
          or: query,
        };
      },
    },

jessrynkar2 years ago
hi
@381079209197699083
- I think you're on the right path here. I would expect the filterOptions query to look something like this:
```
      filterOptions: ({ data }) => {
        return {
          technologies: { in: data.technologies },
        };
      },
```
davedamage2 years ago
Thanks that solved it

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