Defect #1256: Open multiple metadata edition forms can mess session data and result in data inconsistency - easySDI - easySDI Forge

Defect #1256

Open multiple metadata edition forms can mess session data and result in data inconsistency

Added by Blatti Yves almost 3 years ago. Updated over 2 years ago.

Status:

Affected

Start date:

02/04/2016

Priority:

Normal

Due date:

Assignee:

% Done:

30%

Category:

CATALOG

Target version:

Affected version:

4.0.0

Description

Open multiple metadata edition forms can mess session data and result in data inconsistency:

How to reproduce (not recommended in production !):

Open metadata "A" in edition
Open metadata "B" in edition (don't close A, use a new browser window or tab)
Save metadata "A"
Cry

What happens:

On edit, multiple values are stored in session, and they're not linked to IDs/GUIDs
If you edit a second item, the first one's data are overwritten
If you save the first item form, with some of the session's data of the second one -> big mess (examples: wrong relations stored in DB, wrong ids stored in CSW server... )

What could we do:

Clean option (aka rich man's option) : rewrite everything, at least:
- Session store on edit
- Save
- All ajax calls
- Import
- Replication
- Synchronize
- Child synchronize
- Everything that I missed
- This also means that we move away from component creator's logic / MVC usage

Simple option : keep the 'one form at a time' and disallow the save of an metadata if the session ID's doesn't match with form's values
- Check on save, inform on fail
- Inform user by AJAX that the metadata cannot be saved anymore (to prevent loosing to much work of edition)
  - Lock the form
  - Show a message (see screenshot : simple_option_lock.png)

Dear TC, what do you think ?

simple_option_lock.png (179 KB) Blatti Yves, 02/04/2016 11:42 AM

History

#1 Updated by Blatti Yves almost 3 years ago

Simple option could be achieved with an ajax polling, and disable the form could be done like this:

//disable form
jQuery('.metadata-edit.front-end-edit #form-metadata select').prop('disabled', true).trigger("liszt:updated");
jQuery('.metadata-edit.front-end-edit #form-metadata button').prop('disabled', true);
jQuery('.metadata-edit.front-end-edit #form-metadata a.btn').not('.collapse-btn').prop('disabled', true).addClass('disabled');
jQuery('.metadata-edit.front-end-edit #form-metadata :input').filter(':text,:password,textarea').prop('disabled', true);
//show message
Joomla.renderMessages({'error': ['<b>Cette fiche est verrouillée</b><br/>Vous avez ouvert une autre fiche en édition, ou votre session a expiré. Il est impossible de sauver cette fiche.'] });
//move to top
jQuery("html, body").animate({ scrollTop: 0 });