Redirect users away from Admin breaks ajax

Question

Tried to make a simple redirect for some users I don't want to access the wp-admin/, so I did this code:

function no_admin_access() {
    if ( !current_user_can( 'delete_posts' ) ) {
        wp_redirect( site_url( '/' ) ); exit;
    }
}
add_action('admin_init', 'no_admin_access');

But when I then try to make a ajax request with those users, the that is also redirected so I never get to admin-ajax.php

Anybody who has a good work around for this ?

Thanks.

AJAX Code

$.ajax({
    type: 'POST',
    url: MyAjax.ajaxurl,
    data: {
        action: 'mux_ajax_delete_pix',
        pid: $this.attr('data-id')
    },
    success: function(){
        $this.parent().fadeOut();
    }
});

Answer 1

You can and a check for the DOING_AJAX constant which is defined on an Ajax in your conditional check:

function no_admin_access()
{
    if (
        // Don't do this for AJAX calls
        ! defined( 'DOING_AJAX' ) 
        // Capability check
        && ! current_user_can( 'delete_posts' ) 
        )
    {
        // Redirect to home/front page
        wp_redirect( site_url( '/' ) );
        // Never ever(!) forget to exit(); or die(); after a redirect
        exit;
    }
}
add_action( 'admin_init', 'no_admin_access' );