How to make a dynamic query in WP_Query?

Question

WordPress

Good evening. It is impossible to create a dynamic request through the $args parameters in any way. Plain SQL is not suitable because the data in the table is serialized.
I also tried to add parameters to tax_query through foreach, but all in vain. WP_QUERY returns nothing.
The essence of the task is that attributes or taxonomies will change or their number will change and for this you need to generate a certain $args.
I've been working on this task all day, but I couldn't do anything sensible, and there is very little information on the Internet about dynamic queries. Who understands, write what to do?

Answer 1

Well, in fact - here you can make a shortcode
And squander the shortcode for your purposes - where you will set the post type, number of posts, taxonomy, etc. - everything is possible

// Shortcode for projects [projects-list posts="3"]
function projects_listing_parameters_shortcode( $atts ) {
    ob_start();

    $args = shortcode_atts( array (
        'type' => 'projects',
        'posts' => 6,
        'cat' => ''
    ), $atts );

    $options = array(
        'post_type' => $args['type'],
        'posts_per_page' => $args['posts'],
        'tax_query' => array(
            array (
                'taxonomy' => 'project',
                'field' => 'slug',
                'terms' => $args['cat'],
            )
        ),
    );

    $query = new WP_Query( $options );

    if ( $query->have_posts() ) $item = 0; {
        while ( $query->have_posts() ) : $query->the_post(); $item++;
            echo '<div class="item item-' . $item . '">';
                get_template_part( 'template-parts/project-cards', get_post_format() );
            echo '</div>';
        endwhile;
        wp_reset_postdata();
        $myvariable = ob_get_clean();
        return $myvariable;
    }
}
add_shortcode( 'projects-list', 'projects_listing_parameters_shortcode' );