custom post query into shortcode

<?php


function services_shortcode($atts, $content = null) {
    extract(shortcode_atts(array(

    ), $atts));
        $q = new WP_Query(
             array('posts_per_page' => '4', 'post_type' => 'services')
        );
            $list .= '';
                while($q->have_posts()) : $q->the_post();
                    $idd = get_the_ID();
                    $emedic = get_post_meta($idd, 'emedic', true);

                    $list .= '';

                endwhile;
            $list .= '';
        wp_reset_query();
    return $list;
}
add_shortcode('servicepost', 'services_shortcode');


function mix_content_shortcode($atts, $content = null) {
        extract(shortcode_atts(array(
            'count' => '',
            'category' => '',
        ), $atts));
            $q = new WP_Query(
                 array('posts_per_page' => $count, 'post_type' => 'mixitup_item', 'mixit_cat' => $category)
            );
                    $list .= '<div id="worksGrid">';
                        while($q->have_posts()) : $q->the_post();
                            $idd = get_the_ID();
                            $image_id = get_post_thumbnail_id();
                            $image_url = wp_get_attachment_image_src($image_id,'thumbimage');
                            $image_thmb = $image_url[0];
                            $mixcategory = get_post_meta($idd, 'mixcategory', true);
                            $mixsubtitle = get_post_meta($idd, 'mixsubtitle', true);
                            $mixlargeimage = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'mlimage');
                            $list .= '

<div class="col-md-4 col-sm-4 col-xs-12 worksItem '.$mixcategory.'">
    <img src="'.$image_thmb.'" alt="">
    <div class="itemCaption">
        <div class="capContent">
            <h3>'.get_the_title().'</h3>
            <p>'.$mixsubtitle.'</p>
            <a class="capPreview image-modal" href="#image-modal'.get_the_ID().'">Preview</a>
        </div>
    </div>
    <div id="image-modal'.get_the_ID().'" class="mfp-hide modal-box">
        <img src="'.$mixlargeimage[0].'" alt="">
          <div class="modal-box-content">
            <h2>'.get_the_title().'</h2>
            <p>'.get_the_content().'</p>
          </div>
    </div>
</div>

                            ';

                        endwhile;
                    $list .= '</div>';
            wp_reset_query();
        return $list;
}
add_shortcode('portfolioitem', 'mix_content_shortcode');




?>