Sometimes we need to add more fields to the job posting form. This is step by step for how to add more fields to the job posting form via child theme.

Step 1: Add new extra field to job posting form on both file wp-content\themes\injob-child\iwj\dashboard\new-job\form.php and wp-content\themes\injob-child\iwj\dashboard\edit-job.php

iwj_field_text('new_job_field', __('New custom field *', 'iwjob'), true, $post_id, null, '', '', __('Enter the value', 'iwjob'));

Step 2: Process for save job custom field on job update function.

add_action('iwj_update_job', 'update_job_custom_field');
add_action('iwj_add_new_job', 'update_job_custom_field');

function update_job_custom_field($post_id){
    $custom_field = sanitize_text_field($_POST['new_job_field']); 
    update_post_meta($post_id, 'new_job_field', $custom_field );
}

Step 3: Add new extra field  to job posting in backend via filter iwj_admin_job_fields on file functions.php

add_filter('iwj_admin_job_fields', function($fields) {
    $fields['general']['fields'][] = array(
            'name' => __('New custom field', 'injob'),
            'id' => 'new_job_field',
            'type' => 'text',
            'required' => true,
        );
    return $fields;
}

Step 4: Process for admin save job detail.

add_action('iwj_admin_save_job', function($pid) {
    $custom_field = sanitize_text_field($_POST['new_job_field']);
    update_post_meta($pid, 'new_job_field', $custom_field );
});

Step 5: Show custom field data on job detail page

Copy job detail template from plugin on wp-content/plugins/iwjob/templates/parts/job-details/ to  wp-content/themes/injob-child/iwj/parts/job-details/

Then you can use this code to show your custom field value

$new_field_val = get_post_meta($job->get_id(), 'new_job_field', true);
echo esc_attr($new_field_val);

All done!