laravel rule required and unique code example

Example 1: laravel validation

/**
 * Store a new blog post.
 *
 * @param  Request  $request
 * @return Response
 */
public function store(Request $request)
{
    $validatedData = $request->validate([
        'title' => 'required|unique:posts|max:255',
        'body' => 'required',
    ]);

    // The blog post is valid...
}

Example 2: laravel rule unique where

'required|email|unique:company_users,email_address,NULL,id,company_id,' . $request->company_id

Example 3: validate field for existing client laravel

unique:users,username,id,1 // table, field, idcolumn, value to ignore