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Getting checkbox values inside filter

  • Hi there.

    I’m trying to validate a checkbox field in the frontend. The checkbox values are generated dynamically and I have to check for several checkboxes to see if any of them has any value selected.
    I’m using a filter to get the checkbox field, but now I need to access the checkbox values.
    How can I do that inside the filter? I just need to know if there are no selected values, no need to identify which ones are selected. Just need an “is empty” information.


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