create dynamic table row inserting through shortcodes

[VeshGrg]

I'm trying to insert a table row/s dynamically through form by shortcodes functionality.
shortcode : [post id="1,2,3"]
I'm trying to insert table 'post' with id=['1', '2', '3'] rows with my form data.
I have created a new shortcode called InsertAddShortcode and and register it in boot method of ShortcodeServiceProvider.
I have made register method inside InsertAddShortcode.php

public function register($shortcode, $content, $compiler, $name, $viewData)
    {
             $query = $shortcode->table::find($shortcode->id);
            return sprintf($shortcode->table=$query, $shortcode->id= $query->id, $shortcode->class, $content);
    }

but it show error: Class name must be a valid object or a string.

I'm stuck in this process.
Any advice, solution would be highly appreciated.
Thanks in advance!!