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Combine values from checkboxes and text/repeater fields

  • I am setting up a poll with a front end form. I would like to show a list of checkboxes of possible answers, and then also a text or repeater field to add your own answers.

    Once someone has added an answer, I would like that answer to be given its own checkbox in the list for future participants to be able to choose. So, the manually entered answer from the text/repeater field would then become a value for the list of checkboxes.

    I apologize if this question is too vague or conceptual, but I don’t even know where to start with the code to bring the checkbox fields in the text/repeater fields together. Any help is appreciated!

  • Here’s where I’m starting to build the form: make a list of checkboxes from previous answers and assign them to the $checkboxes[] variable.

    if ( $poll_responses->have_posts() ) :
        while ( $poll_responses->have_posts() ) :
            if ( have_rows( 'poll_answer', get_the_ID() ) ) :
                while ( have_rows( 'poll_answer', get_the_ID() ) ) :
                    // print checkboxes for each existing answer
                    echo '<input type="checkbox" name="checkboxes[]" ';
                    echo 'value="' . get_sub_field( 'answer', get_the_ID() ) . '">';
    // text or repeater field to add your own custom poll answer
    // (this part works fine, values added as expected, show up in list of previous answers)

    Then I save the checkbox answers and the new custom answers:

    function dutchtown_save_poll_response( $post_id )
        if ( get_post_type( $post_id ) !== 'poll_response' ) : return; endif;
    	if ( is_admin() ) : return; endif;
    	$post = get_post( $post_id );
        if ( have_rows( 'poll_answer', $post_id ) ) :
            while ( have_rows( 'poll_answer', $post_id ) ) :
                $answer[] = get_sub_field( 'answer', $post_id );
        if ( ! empty( $_POST['checkboxes'] ) ) :
            for ( $i = 0; $i < count( $_POST['checkboxes'] ); $i++ ) :
                if ( $_POST['checkboxes'][$i] != '' ) :
                    add_row( 'poll_answer', array( 'answer' => $_POST['checkboxes'][$i] ) );

    The custom answers show correctly when the list is refreshed. The checkbox answers get inserted into the database, but show as blank both in the new checkbox list and when I go to look at the created post in wp-admin. I’m not sure where the disconnect is—or if I’m going about this all wrong.

  • Do do this you need to create an acf/save_post action.

    1. In your filter you need to get the value from the repeater
    2. use get_field_object() to get the checkbox field.
    3. Add the new choices to $field[‘choices’]
    4. call acf_update_field($field) to permanently add the choices to the field
    5. delete the values from the repeater.
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