mirror of
https://github.com/ZoneMinder/zoneminder.git
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Isaac ConnorandClaude Opus 5.5
c4ef3fdd62
Every query on Frames filters on EventId and orders or ranges by FrameId, and nothing needs a frame by Id. The Id primary key was a clustered index nothing read, and EventId_FrameId_idx was a secondary index every query used. On a copy of a local table that secondary index was half the table's size. With (EventId, FrameId) as the primary key the index is gone, and an event's rows are stored together, so deleting an event is a range delete. zm_update-1.39.36.sql: - converts AI_Detections.FrameId from Frames.Id to the per-event frame number, drops its foreign key to Frames and indexes (EventId, FrameId). A composite foreign key cannot replace it: ON DELETE SET NULL would have to null the NOT NULL EventId, and Frames rows are written in batches, so a detection can be recorded before its frame row. - removes duplicate (EventId, FrameId) rows, keeping the earliest. - rebuilds Frames with the new primary key. - removes ON UPDATE CURRENT_TIMESTAMP from Frames.TimeStamp. Any UPDATE of a frame row was overwriting its capture time. Each step checks the current schema first, so the migration can be re-run. REST API: view, edit and delete take /frames/<action>/<EventId>/<FrameId>.json. The old single-Id URLs return 404. CakePHP 2 has no composite keys, so the model's primaryKey is EventId. That keeps Event's dependent cascade delete limited to the event's own frames. The controller writes with explicit (EventId, FrameId) conditions instead of save(), which would match rows on EventId alone. Edit no longer changes EventId or FrameId. view=image with fid but no eid used to look up Frames.Id. It now returns 404. The Perl Frame class is identified by (EventId, FrameId). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
77 lines
1.9 KiB
Perl
77 lines
1.9 KiB
Perl
# ==========================================================================
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#
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# ZoneMinder Monitor Module, $Date$, $Revision$
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# Copyright (C) 2001-2008 Philip Coombes
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# ==========================================================================
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#
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# This module contains the common definitions and functions used by the rest
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# of the ZoneMinder scripts
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#
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package ZoneMinder::Frame;
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use 5.006;
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use strict;
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use warnings;
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require ZoneMinder::Base;
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require ZoneMinder::Object;
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use parent qw(ZoneMinder::Object);
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use vars qw/ $table @identified_by %fields /;
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$table = 'Frames';
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@identified_by = ('EventId', 'FrameId');
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%fields = (
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EventId => 'EventId',
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FrameId => 'FrameId',
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Type => 'Type',
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TimeStamp => 'TimeStamp',
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Delta => 'Delta',
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Score => 'Score',
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);
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sub Event {
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return new ZoneMinder::Event( $_[0]{EventId} );
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} # end sub Event
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1;
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__END__
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=head1 NAME
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ZoneMinder::Frame - Perl Class for Frames
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=head1 SYNOPSIS
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use ZoneMinder::Frame;
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=head1 AUTHOR
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Isaac Connor, E<lt>isaac@zoneminder.comE<gt>
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=head1 COPYRIGHT AND LICENSE
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Copyright (C) 2001-2017 ZoneMinder LLC
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Licensed under the GNU General Public License v2 or later; see the COPYING
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file distributed with ZoneMinder for the full text.
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=cut
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