[Plugin: Network Latest Posts] multiple instances thumbnail issue

Hello Simon,

Thanks for your comment, nice site by the way. I see what you mean, but just wondering, did you recently migrate the blog with id #2? The plugin seems to be working as expected but if you go to: Nellahs Tipp: selbst gemachtes nuss – granola müsli Images are missing.

This happened to me when I migrated one of my sites and for some reason files inside folder /files/year/month/ weren’t copied with the rest of the folders and files.

Could you please check the images are really inside the folder /blogs.dir/2/files/2011/05/ as they should be? and if they are, check if they have reading permissions.

Let me know if there’s something else I can help you with.

Cheers.

Hi thanks for your response! yes I actually changed the site’s name, which broke the image paths… BUT the problem is, that this should be blog ID 52, and 62 respectively, and not blog id 2…. weird is that it does work for the first instance (blog id 35), but the 2nd and 3rd instance all try to pull the image from *blogs.dir/2/*.. no idea where blogid 2 comes from.

Hi Simon,

Well it’s pretty weird, I think this is not a problem related to NLPosts but to your images’ paths. This is because NLPosts uses the WordPress hook get_the_post_thumbnail which retrieves featured images set for your posts and are stored into the posts’ table as attachment.

I’ve checked your nlp instances, you have 3: nlp-instance-2, nlp-instance-3, nlp-instance-4. From those only nlp-instance-2 is working ok. You say The first instance is blog id 35 but the thumbnail is being taken from blog id 6, so I’m wondering where are you seeing those id numbers?

So I have another question, when you updated your post images to fix the paths, did you also fixed the thumbnails? Because thumbnails are generated statically only once, it means, once you created the thumbnail using the “Featured Image” function, they will stay there forever, even if you update the post they won’t be created again. If you changed paths or urls, thumbnail urls won’t be updated, they will be pointing to the old path until you change that manually if the old path don’t exist anymore, the result is… missing images.

You can also check where your blog Upload path is pointing to, go to Network Admin > Sites > Select your site > Settings then check the Upload Path parameter (but I doubt this is wrong, I firmly believe those thumbnails just need to be created again, that’s all).

Let me know what do you find.

P.S: You can check two instances for different blogs working together here: Widgets NLPosts

Cheers.

thank ypou so much for looking into this. Unfortunately I can’t find the reason why I can’t get it to work. the images are there, but for some reason, the nlp plugin does not write the URl correctly..
so instead of:
https://sortofme.com/leckerschmecker/wp-content/blogs.dir/52/files/2011/05/Muesli1-150×150.jpg

it tries to find the image at https://sortofme.com/leckerschmecker/wp-content/blogs.dir/2/files/2011/05/Muesli1-150×150.jpg

(the difference lies in the blog ID) What I don’t understand, is why this works for one of them, but not the others…
Of course I have checked whether the post thumbnails have been updated as well, but if I correct the URL in the browser, the images do display).

I also found the code within your plugin on line 489
$thumb_html = get_the_post_thumbnail($field->ID,$thumbnail_size,array('class' =>$thumbnail_class));
and this seems right. so am a bit desperate, I already spent quite some time trying to figure that one out now….

interestingly, the samples you have on your site, are all pulling the images from blog.dir/2/* as well, except for the last instace, which is pulling them from blog id 5

in case you have a look, it now works, but because of an awefull hack, that will make it fall when u have a new update, but had to get this done somehow.
So I str_replaced one part

$thumb_html = str_replace( "wp-content/blogs.dir/2", '',get_the_post_thumbnail($field->ID,$thumbnail_size,array('class' =>$thumbnail_class)));

works fine.
still would love to knwo how that has happened, apparently just with me…

Hi Simon, yes in those examples you see in my blog thumbnails display id 2 mostly because it’s my blog in english which is the one with most recent content to show, but if you check images here: NLPosts CSS each thumbnail is pulled from their own blog id, (2 english, 5 spanish).

I was digging a little bit about this issue and found this: MULTISITE not defined. Apparently people who upgraded “jumping” two or more versions were having issues with file paths.

Just wondering if this is your case, the problem I see with your hack if implemented, is for those of us who have a blog id 2 will see it stripped out which will result in missing images.

I would suggest you to try one of these plugins: Thumbnail sizing this topic was opened for thumbnail sizes, but I think it would help you to regenerate all thumbnail images and hopefully fix their paths.

As I told you before, I don’t believe this is a bug in NLPosts but an issue with your WordPress installation or maybe upgrading history. I will explain the reasons why I believe so:

Network Latest Posts uses this hook to pull thumbnails:

// Get the thumbnail
$thumb_html = get_the_post_thumbnail($field->ID,$thumbnail_size,array('class' =>$thumbnail_class));

// If there is a thumbnail
if( !empty($thumb_html) ) {
     // Display the thumbnail
     echo "<a href='".$all_permalinks[$field->guid]."'>$thumb_html</a>";
}

Where $field->ID is the post’s ID, considering your post titles and other links are pointing to the right article, it’s impossible NLPosts is taking the wrong $field->ID number, otherwise it would be reflected in wrong links everywhere. So this take us to the thumbnails paths stored into the database.

If you use that hook manually in a test page, get_the_post_thumbnail(post_id_here) you can see what’s being pulled out. Of course it must be used in a file within the blog you want to test.

get_the_post_thumbnails will pull information related to attachments for a specific post ID, NLPosts doesn’t interfere with this hook, it doesn’t change URLs or paths anywhere, it just pulls out paths already stored when those images were added to the post and were created by WordPress attachment functions.

As for blog IDs they’re pulled from wp_blogs table, and as stated before, your posts are being correctly extracted and links are working ok so it can’t be a problem with incorrect blog IDs. So thumbnails issues must be being caused by a malfunction somewhere in your blogs mostly related to thumbnails generation.

If you try one of those plugins to regenerate thumbnails, let me know if that worked for you.

P.S: I forgot to mention this topic problem thumbnails someone else had issues with thumbnails using NLPosts but those problems were related to external plugins, and NLPosts v3 doesn’t use the same code to display thumbnails anymore.

I hope this helps you find out what’s going on.

Kind regards.