All node revisions were stored in a serialized field in the node table and retrieved for _each_ page view although they are rarely needed. We created a separate revisions table which would be in principle identical to the node table, only that it could have several old copies of the same node. This also allows us to revision-related information, and to provide log entries to non-book pages when a new revision is being created.
TODO:
1. Provide upgrade instructions for node module maintainers!
2. Upgrade modules that implement node types.
3. Provide an upgarde path for revisions. Dependency on the upgrade system.
Note: I also (mostly) unified the tags to use the "// ID" form instead of "/* ID */", but that's more of a cosmetic issue. I'm not sure whether *.txt files and the stuff in themes/ need tags(?).
keep track of the user's last access. In turn, this allowed me to:
1. Optimize the "Who's online" block. On drupal.org, the "Who's online"
block requires 32 SQL queries. With this patch, only 2 queries are
left (eliminated 30 SQL queries), and one of the two remaining queries
became appr. 20 times faster.
2. Correct the "Last access" column in the user administration overview
table. The presented data was not accurate, which led to the column
being removed. You can now sort users by 'last access'.
- Converted the Bluemarine theme from XTemplate to PHPTemplate.
- Moved the the Pushbutton theme and the Xtemplate engine to the contributions repository.
Drupal's existing caching mechanism doesn't perform well on highly dynamic websites in which the cache is flushed frequently. One example is a site that is under attack by a spambot that is posting spam comments every few seconds, causing all cached pages to be flushed every few seconds. Loose caching immediately flushes the cache only for specific users who have modified cached data (whether or not they are logged in), delaying the flushing of data for other users by several minutes.
(I rewrote the help text a bit and made minor changes to the code comments.)
This patch adds folksonomy support to Drupal (named internally as "Free tagging"). In a nutshell, the core difference is the input method: unlike normal taxonomies which are administratively controlled, a "free tagging" vocabulary allows tag creation when the node is submitted. It does this through an text input box, as opposed to a dropdown or selectbox. This patch:
* Removes the useless "Preview form" of a vocabulary.
* Alters the vocabulary table to include a new "tags" column.
* Adds a new "Free tagging" preference on vocabulary creation/editing.
* Modifies the vocabulary overview to support pagers for free tagging vocabs.
The new code integrates tightly with the existing taxonomy code. The only additional processing occurs on node save and edit, where we parse through the tags associated with a node. All other display (and thus, code) remains the same.
1. Removed a duplicate line from the changes to update.inc.
2. Excluded the session.inc changes: they did not make sense to me.
3. Excluded the search related changes in the node and search module. According to Steven these are not correct.
Dries Buytaert
Steven Wittens