Previously, the 'page_comments' toggle allowed users to disable comment
pagination. This toggle was only superficial, however. Even with
'page_comments' turned on, `comments_template()` loaded all of a post's
comments into memory, and passed them to `wp_list_comments()` and
`Walker_Comment`, the latter of which produced markup for only the
current page of comments. In other words, it was possible to enable
'page_comments', thereby showing only a subset of a post's comments on a given
page, but all comments continued to be loaded in the background. This technique
scaled poorly. Posts with hundreds or thousands of comments would load slowly,
or not at all, even when the 'comments_per_page' setting was set to a
reasonable number.
Recent changesets have addressed this problem through more efficient tree-
walking, better descendant caching, and more selective queries for top-level
post comments. The current changeset completes the project by addressing the
root issue: that loading a post causes all of its comments to be loaded too.
Here's the breakdown:
* Comment pagination is now forced. Setting 'page_comments' to false leads to evil things when you have many comments. If you want to avoid pagination, set 'comments_per_page' to something high.
* The 'page_comments' setting has been expunged from options-discussion.php, and from places in the codebase where it was referenced. For plugins relying on 'page_comments', we now force the value to `true` with a `pre_option` filter.
* `comments_template()` now queries for an appropriately small number of comments. Usually, this means the `comments_per_page` value.
* To preserve the current (odd) behavior for comment pagination links, some unholy hacks have been inserted into `comments_template()`. The ugliness is insulated in this function for backward compatibility and to minimize collateral damage. A side-effect is that, for certain settings of 'default_comments_page', up to 2x the value of `comments_per_page` might be fetched at a time.
* In support of these changes, a `$format` parameter has been added to `WP_Comment::get_children()`. This param allows you to request a flattened array of comment children, suitable for feeding into `Walker_Comment`.
* `WP_Query` loops are now informed about total available comment counts and comment pages by the `WP_Comment_Query` (`found_comments`, `max_num_pages`), instead of by `Walker_Comment`.
Aside from radical performance improvements in the case of a post with many
comments, this changeset fixes a bug that caused the first page of comments to
be partial (`found_comments` % `comments_per_page`), rather than the last, as
you'd expect.
Props boonebgorges, wonderboymusic.
Fixes#8071.
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* Don't allow comments to be created for posts that have `comment_status` set to `'closed'`
* Set some magic props on `WP_User` to vars before passing them to `wp_xmlrpc_server::escape()`
Props wonderboymusic, jesin.
Fixes#27471.
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Shortlinks had their day in the popular usage sun before all these services moved to their own shorteners and running your own custom one became a lot easier. Shortlinks are still useful in some contexts, such as analytics or when links need to be shared verbally or copied down by hand.
If any filters are hooked onto `pre_get_shortlink` or `get_shortlink` and produce a non-empty value (with an exception described below), the button will magically reappear. This allows any custom shortlinks to keep the button without hiccups.
If you're in need of the default shortlinks, the fastest way to reenable them is `add_filter( 'pre_get_shortlink', '__return_false' )`. Note that it must return false in order to continue on to the rest of `wp_get_shortlink()`.
props grvrulz for the initial patch.
fixes#33495.
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This is hopefully the final attempt at adding notifications to the #core channel on Slack. By default, Travis spams the channel. In order to cut that down a bit, notifications are set as follows:
- On Failure: Always (If the tests fail, the world needs to know)
- On Success: Change (this means that the first green run after a red run aka, the world is happy again)
- On Start: Never (Travis runs every time there is a commit. No need for a notification)
Props Netweb, samuelsidler
Fixes#30755
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Comments can be threaded. Now your query can be threaded too! Bonus: it's
not totally insane.
* The new `$hierarchical` parameter for `WP_Comment_Query` accepts three values:
* `false` - Default value, and equivalent to current behavior. No descendants are fetched for matched comments.
* `'flat'` - `WP_Comment_Query` will fetch the descendant tree for each comment matched by the query paramaters, and append them to the flat array of comments returned. Use this when you have a separate routine for constructing the tree - for example, when passing a list of comments to a `Walker` object.
* `'threaded'` - `WP_Comment_Query` will fetch the descendant tree for each comment, and return it in a tree structure located in the `children` property of the `WP_Comment` objects.
* `WP_Comment` now has a few utility methods for fetching the descendant tree (`get_children()`), fetching a single direct descendant comment (`get_child()`), and adding anothing `WP_Comment` object as a direct descendant (`add_child()`). Note that `add_child()` only modifies the comment object - it does not touch the database.
Props boonebgorges, wonderboymusic.
See #8071.
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[34537] hooked `wp_new_comment_notify_postauthor()` to the
'wp_set_comment_status' when a comment had been approved. When performing
multiple actions on a comment in the same request (as happens in
`Tests_Ajax_DeleteComment::test_ajax_trash_double_action()`, and may happen
sometimes in real life too), and when one of those actions involves deleting
the comment, the `$comment_ID` passed to `wp_new_comment_notify_postauthor()`
can correspond to an already-deleted comment. The `comment_status` check should
account for this possibility.
See #14078.
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`WP_Comment_Query` will now report the total number of comments matching the
query params (`comments_found`), as well as the total number of pages required
to display these comments (`max_num_pages`). Because `SQL_CALC_FOUND_ROWS`
queries can introduce a lot of overhead in some cases, we disable the feature
by default. Pass `no_found_rows=false` to `WP_Comment_Query` to enable the
count. (We use the negative parameter name 'no_found_rows' for parity with
`WP_Query`.)
Props wonderboymusic, boonebgorges.
See #8071.
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The 'last_changed' incrementor is used to invalidate the `get_terms()` query
cache. Since `get_terms()` queries may reference 'meta_query', changing term
metadata could change the results of the queries. So we invalidate the cache
on add, delete, and update.
See #10142.
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This is part of the project of #33587.
Moving this particular message to the
'wp_set_comment_status' action has the added bonus that the notification is
sent after the comment status has been updated in the database. Previously, a
database error could lead to a case where an approval notification is sent,
but the comment status change fails for some reason.
Props mrmist, NickDuncan.
Fixes#14078.
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`wp_allow_comment()` disallows a comment if it matches a comment on the same
post with the same content, author email, and parent. This new filter allows
developers to circumvent or modify this logic, making the duplicate check
more or less lenient, as they see fit.
Fixes#9775.
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The new `$comment_meta` parameter of `wp_insert_comment()` allows an array of
key/value pairs to be passed when creating a comment. These pairs are then
stored as commentmeta when the comment has been created.
Props tellyworth, wonderboymusic.
Fixes#12431.
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This is an alternative to using 'offset', and manually calculating pagination.
Note that 'paged' works only in conjunction with 'number', the latter of which
provides the per-page value.
Props sebastian.pisula.
Fixes#25145.
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Adds a new table to the database schema (`wp_termmeta`), and a set of
`*_term_meta()` API functions. `get_terms()` and `wp_get_object_terms()`
now also support 'meta_query' parameters, with syntax identical to other
uses of `WP_Meta_Query`.
When fetching terms via `get_terms()` or `wp_get_object_terms()`, metadata for
matched terms is preloaded into the cache by default. Disable this behavior
by setting the new `$update_term_meta_cache` paramater to `false`.
To maximize performance, within `WP_Query` loops, the termmeta cache is *not*
primed by default. Instead, we use a lazy-loading technique: metadata for all
terms belonging to posts in the loop is loaded into the cache the first time
that `get_term_meta()` is called within the loop.
Props boonebgorges, sirzooro.
See #10142.
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