SQL query for restoring the latest revision on all posts in wordpress - sql

Question

My wordpress site recently got attacked and all the posts seem to have been updated with a blank version. So I want to restore the most latest revision for all posts. (NB: In wordpress the current published version is also stored in the database as a revision. So I think I would need to restore the 2nd revision (when arranged in the descending order))
What would be the SQL query for that?
Any help would be greatly appreciated!

Answer 1

So, all you need is in your database (luckily). The posts themselves can be retrieved like this
global $wpdb;
$query = "SELECT * FROM wp_posts WHERE post_type = 'revision'";
$query_results = $wpdb->get_results($query, ARRAY_A);
foreach ($query_results as $q_key => $q_value) {
$post = array(
'post_content' => $q_value['post_content']
'post_name' => $q_value['post_name']
'post_title' => $q_value['post_title']
'post_status' => $q_value['post_status']
'post_type' => 'post'
'post_author' => $q_value['post_author']
'ping_status' => $q_value['ping_status']
'post_parent' => $q_value['post_parent']
'menu_order' => $q_value['menu_order']
'to_ping' => $q_value['to_ping']
'pinged' => $q_value['pinged']
'post_password' => $q_value['post_password']
'guid' => $q_value['guid']
'post_content_filtered' => $q_value['post_content_filtered']
'post_excerpt' => $q_value['post_excerpt']
'post_date' => $q_value['post_date']
'post_date_gmt' => $q_value['post_date_gmt']
'comment_status' => $q_value['comment_status']
);
wp_insert_post( $post );
}
Read about wp_insert_post() here.
Now, depending on how much posts you have, this can either take a while, or it can break. If it breaks, then you'll need to wrap this in a function that you'll call with AJAX. Something like this should do the trick:
add_action( 'wp_ajax_insert_posts', 'database_ajax_insert_posts' );
add_action( 'wp_ajax_nopriv_insert_posts', 'database_ajax_insert_posts' );
function database_ajax_insert_posts(){
global $wpdb;
$offset = $_POST['offset'];
$query = "SELECT * FROM wp_posts WHERE post_type = 'revision' LIMIT $offset, 1";
$query_results = $wpdb->get_results($query, ARRAY_A);
foreach ($query_results as $q_key => $q_value) {
$post = array(
'post_content' => $q_value['post_content']
'post_name' => $q_value['post_name']
'post_title' => $q_value['post_title']
'post_status' => $q_value['post_status']
'post_type' => 'post'
'post_author' => $q_value['post_author']
'ping_status' => $q_value['ping_status']
'post_parent' => $q_value['post_parent']
'menu_order' => $q_value['menu_order']
'to_ping' => $q_value['to_ping']
'pinged' => $q_value['pinged']
'post_password' => $q_value['post_password']
'guid' => $q_value['guid']
'post_content_filtered' => $q_value['post_content_filtered']
'post_excerpt' => $q_value['post_excerpt']
'post_date' => $q_value['post_date']
'post_date_gmt' => $q_value['post_date_gmt']
'comment_status' => $q_value['comment_status']
);
wp_insert_post( $post );
}
}
And AJAX
jQuery(document).ready(function($) {
"use strict";
var offset = 1;
function ajax_call(){
$.ajax({
type: "POST",
url: ajaxurl,
data: {
'action': 'insert_posts',
'offset': offset,
},
success: function(response) {
if (offset < 100){ //Number of posts go here
offset += 1;
ajax_call();
} else{
$('#wpbody-content').append('<p>All done!</p>' );
}
},
error : function (jqXHR, textStatus, errorThrown) {
$('#wpbody-content').html(jqXHR + ' :: ' + textStatus + ' :: ' + errorThrown);
}
});
}
ajax_call();
});
Also be sure to localize your AJAX url with the handle of the script in which you'll put your AJAX call.
wp_localize_script('your_handle', 'db_from_WP', array(
'ajaxurl' => admin_url( 'admin-ajax.php' )
));
Taxonomy should be in the database, and you could get them in a similar fashion.
This is not foolproof, but should work. The thing that I can see that could be a bit problematic is getting the right taxonomy for the post, but that is doable, although with a bit fiddling around.
Hope this helps.