class-gravityview-field-id.php

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<?php
/**
 * @file class-gravityview-field-id.php
 * @since 2.10
 * @subpackage includes\fields
 * @package GravityView
 */

class GravityView_Field_ID extends GravityView_Field {

    var $name = 'id';

    var $is_searchable = true;

    var $search_operators = array( 'is', 'isnot', 'greater_than', 'less_than', 'in', 'not_in' );

    var $group = 'meta';

    var $icon = 'dashicons-code-standards';

    var $is_numeric = true;

    public function __construct() {
        $this->label       = esc_html__( 'Entry ID', 'gk-gravityview' );
        $this->description = __( 'The unique ID of the entry.', 'gk-gravityview' );
        parent::__construct();
    }

    public function field_options( $field_options, $template_id, $field_id, $context, $input_type, $form_id ) {

        if ( 'edit' === $context ) {
            return $field_options;
        }

        if ( 'single' === $context ) {
            unset( $field_options['new_window'] );
        }

        return $field_options;
    }
}

new GravityView_Field_ID;