Gravity Forms 动态填充和高级自定义字段，选项未显示答案

【问题标题】：Gravity Forms dynamic population and Advanced Custom Fields, choices not showingGravity Forms 动态填充和高级自定义字段，选项未显示
【发布时间】：2017-04-06 09:24:25
【问题描述】：

我正在使用选项页面中的 ACF 字段来填充重力形式下拉菜单。这些值是从字段中提取的，但显示在表单顶部（预览中），而不是下拉列表中。我确定这是我如何构建表单的问题。提前感谢您的帮助！

见Screenshot

//gravity forms dynamically populate from ACF

add_filter( 'gform_pre_render_1', 'populate_posts' );
add_filter( 'gform_pre_validation_1', 'populate_posts' );
add_filter( 'gform_pre_submission_filter_1', 'populate_posts' );
add_filter( 'gform_admin_pre_render_1', 'populate_posts' );

function populate_posts( $form ) {

    global $choices;

    foreach ( $form['fields'] as &$field ) {

        if ( $field->type != 'select' || strpos( $field->cssClass, 'populate-posts' ) === false ) {
            continue;
        }

        if( have_rows('core_values', 'option') ):

            while( have_rows('core_values', 'option') ): the_row();
                $choices[] = array( 'text' => the_sub_field('value_mstr_name'), 'value' => the_sub_field('value_mstr_name') );
            endwhile;


        // update 'Select a Post' to whatever you'd like the instructive option to be
        $field->placeholder = 'Select a Post';
        $field->choices = $choices;

        endif;

    }

    return $form;
}

【问题讨论】：

标签： php advanced-custom-fields gravity-forms-plugin

【解决方案1】：

您也可以将其限制为特定的帖子类型

add_filter( 'gform_pre_render_3', 'populate_warranty_form' );
add_filter( 'gform_pre_validation_3', 'populate_warranty_form' );
add_filter( 'gform_pre_submission_filter_3', 'populate_warranty_form' );
add_filter( 'gform_admin_pre_render_3', 'populate_warranty_form' );
function populate_warranty_form( $form ) {

foreach ( $form['fields'] as &$field ) {
    // select field with css class 'product-name'
    // this allows dynamic field to use existing css
    if ( $field->type != 'select' || strpos( $field->cssClass, 'product-name' ) === false ) {
        continue;
    }

    $args = array(
        'post_type'     => 'custom_post_type',
        'posts_per_page'=> '-1',
        'post_status'   => 'publish',
        'orderby'       => 'title',
        'order'         => 'ASC'
     );
    $posts = get_posts( $args );

    foreach ( $posts as $post ) {
        $postID = $post->ID;

        if( have_rows('repeater_field', $postID) ): while( have_rows('repeater_field', $postID) ): the_row();
            $choices[] = array( 'text' => get_sub_field('repeater_sub_field'), 'value' => get_sub_field('repeater_sub_field') );
        endwhile; endif;
    }


    // update 'Select a Post' to whatever you'd like the instructive option to be
    $field->placeholder = 'Select';
    $field->choices = $choices;

}

return $form;
}

【讨论】：

【解决方案2】：

我没有将选项定义为数组，对于 ACF，函数 the_sub_field 就像 sub_field 的回声，但 get_sub_field 实际上将其传播到 GF 字段对象选项属性中。

//gravity forms dynamically populate from ACF

add_filter( 'gform_pre_render_1', 'populate_posts' );
add_filter( 'gform_pre_validation_1', 'populate_posts' );
add_filter( 'gform_pre_submission_filter_1', 'populate_posts' );
add_filter( 'gform_admin_pre_render_1', 'populate_posts' );

function populate_posts( $form ) {

    foreach ( $form['fields'] as &$field ) {

        if ( $field->type != 'select' || strpos( $field->cssClass, 'populate-posts' ) === false ) {
            continue;
        }

        if( have_rows('core_values', 'option') ):

        $choices = array();

            while( have_rows('core_values', 'option') ): the_row();
                $choices[] = array( 'text' => get_sub_field('value_mstr_name'), 'value' => get_sub_field('value_mstr_name') );
            endwhile;


        // update 'Select a Post' to whatever you'd like the instructive option to be
        $field->placeholder = 'Select a Core Value';
        $field->choices = $choices;

        endif;

    }

    return $form;
}

【讨论】：