This will create a number of empty rows when there are no rows
function set_start_rows($value, $post_id, $field) {
if (!$value) {
$row = array(
// field key => value pairs for all subfields
'field_5bcf70b75df1d' => NULL,
);
$number_of_rows = 10;
$value = array_fill(0, $number_of_rows, $row);
}
return $value;
}
add_filter('acf/load_value/key=field_5bcf70a95df1c', 'set_start_rows', 20, 3);
This would automatically add 10 a number of new rows if there are no rows or the last row does not contain a value in a field
function set_start_rows($value, $post_id, $field) {
// only do this in the admin
if (!is_admin()) {
return $value;
}
$add_rows = false;
$index = 0;
if (is_array($value)) {
$index = count($value);
if ($value[count($value)-1]['field_5bcf70b75df1d']) {
// field is not empty in last row
$add_rows = true;
}
}
if (!$value) {
$add_rows = true;
}
if ($add_rows) {
if (!$value) {
$value = array();
}
$row = array(
// field key => value pairs for all subfields
'field_5bcf70b75df1d' => NULL,
);
$number_of_rows = 5;
$value = array_merge($value, array_fill($index, $number_of_rows, $row));
}
return $value;
}
add_filter('acf/load_value/key=field_5bcf70a95df1c', 'set_start_rows', 20, 3);
A really elegant way to do this would be to use JavaScript and detect when a value is added to the last row and then automatically add a new row. This should be possible, but I don’t have the answer to how to do that and it would take me a long time to figure out and test.
