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2. The reason is simple - count how many posts would be in transit simultaneously if this was unlimited and somebody tagged 40-50 forums. In practice when used legitimately - we've rarely seen more than two, in fact I don't recall seeing more than two ever. Typically it is one and occasionally two. Changing the default is tricky - a client system cannot do it, but the site hosting a forum can choose to. Since not all sites that host forums will choose to do so, the ordering of the mentions would then be important.
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route matching and only look at the last hop before it got to us - which is ultimately all we should care about (since that sender controls the thread permissions). Route mismatches seem to occur somewhat frequently from yamkote (for unknown reasons), and the logging has been improved a bit so it should provide some slightly more useful debugging info in case it still happens going forward. Oh, also we'll set the parent on comments when we store the initial post (item_store()) and only go back and set the parent for top-level posts. This should reduce the number of comments with missing parents on shared hosts, but may increase the number of missing threads. Probably worthwhile to do a query occasionally for parent = 0 and see how we're doing and how many have shared host related delivery issues.
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warning resulting from recent tag work
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/channel/ string
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delete and not forced
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visible item in the conversation deleted the photo as well. Now photos must be deleted in the photos module. Deleting the linked item removes any attached conversation elements (likes, etc.) and sets the conversation item to hidden. This may create an issue in the future if we move the photo tags, title, or other photo elements to the linked item rather than the photo. Noting here so this can potentially be discovered and remembered at that time.
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is really going on
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Conflicts:
boot.php
include/dba/dba_driver.php
include/diaspora.php
include/follow.php
include/session.php
include/zot.php
mod/photos.php
mod/ping.php
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posted_date selector including years/months that had no posts
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There were 11 main types of changes:
- UPDATE's and DELETE's sometimes had LIMIT 1 at the end of them. This is not only non-compliant but
it would certainly not do what whoever wrote it thought it would. It is likely this mistake was just
copied from Friendica. All of these instances, the LIMIT 1 was simply removed.
- Bitwise operations (and even some non-zero int checks) erroneously rely on MySQL implicit
integer-boolean conversion in the WHERE clauses. This is non-compliant (and bad programming practice
to boot). Proper explicit boolean conversions were added. New queries should use proper conventions.
- MySQL has a different operator for bitwise XOR than postgres. Rather than add yet another dba_
func, I converted them to "& ~" ("AND NOT") when turning off, and "|" ("OR") when turning on. There
were no true toggles (XOR). New queries should refrain from using XOR when not necessary.
- There are several fields which the schema has marked as NOT NULL, but the inserts don't specify
them. The reason this works is because mysql totally ignores the constraint and adds an empty text
default automatically. Again, non-compliant, obviously. In these cases a default of empty text was
added.
- Several statements rely on a non-standard MySQL feature
(http://dev.mysql.com/doc/refman/5.5/en/group-by-handling.html). These queries can all be rewritten
to be standards compliant. Interestingly enough, the newly rewritten standards compliant queries run
a zillion times faster, even on MySQL.
- A couple of function/operator name translations were needed (RAND/RANDOM, GROUP_CONCAT/STRING_AGG,
UTC_NOW, REGEXP/~, ^/#) -- assist functions added in the dba_
- INTERVALs: postgres requires quotes around the value, mysql requires that there are not quotes
around the value -- assist functions added in the dba_
- NULL_DATE's -- Postgres does not allow the invalid date '0000-00-00 00:00:00' (there is no such
thing as year 0 or month 0 or day 0). We use '0001-01-01 00:00:00' for postgres. Conversions are
handled in Zot/item packets automagically by quoting all dates with dbescdate().
- char(##) specifications in the schema creates fields with blank spaces that aren't trimmed in the
code. MySQL apparently treats char(##) as varchar(##), again, non-compliant. Since postgres works
better with text fields anyway, this ball of bugs was simply side-stepped by using 'text' datatype
for all text fields in the postgres schema. varchar was used in a couple of places where it actually
seemed appropriate (size constraint), but without rigorously vetting that all of the PHP code
actually validates data, new bugs might come out from under the rug.
- postgres doesn't store nul bytes and a few other non-printables in text fields, even when quoted.
bytea fields were used when storing binary data (photo.data, attach.data). A new dbescbin() function
was added to handle this transparently.
- postgres does not support LIMIT #,# syntax. All databases support LIMIT # OFFSET # syntax.
Statements were updated to be standard.
These changes require corresponding changes in the coding standards. Please review those before
adding any code going forward.
Still on my TODO list:
- remove quotes from non-reserved identifiers and make reserved identifiers use dba func for quoting
- Rewrite search queries for better results (both MySQL and Postgres)
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a missing top-level post to match it with. So we'll send a request back to the sender that you've never seen this thread and please send a fresh copy of the entire conversation to date. We could soon have posts in the matrix from different platforms from days gone by, which have been migrated into the modern world. We'll be polite and not deliver these to everybody. However, if someone comments on one of these antique threads we wouldn't be able to see it in our own matrix because we won't have a copy of the parent post. So this rectifies that situation. Be aware that item deletion may need to change to keep "hard deleted" items indefinitely so that they don't keep coming back. We'll have to null out the important data of the former item to accomplish the deletion aspect.
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owners wall.
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signing and wall-to-wall attribution correctly.
Do it at the point of submission. This also fixes a potential bug in yesterday's wall-to-wall permission setting,
if it was a local comment to a remote post.
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about 2 1/2 years and even survived a rewrite. Symptoms are that the archive widget only lists one month (the month when you first posted), and only if your first post was written between the 28th and 31st of whatever month that was.
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regex missing terminator char
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through a redmatrix site (parent post is redmatrix) and involve a private post.
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comparisons; update diaspora_compat
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via the conversation structure that needs to be dealt with.
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didn't fall through to RSS discovery. Issue #599
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added attributes so we can use it as a reasonably complete item backup. The encoded_item format gives us extended author and owner information in case we need to probe them to bring the entry back. It also contains taxonomy entries. Importing and/or recovering will best be accomplished in chunks. It could take some time and some memory to chew through this.
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post cannot be enforced on remote networks. Restrict these posts to zot network.
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author import)
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feed items and probably make a mess of things
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easily mis-typed sequence '0000-00-00 00:00:00'
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