[Xerte-dev] Re: HELP - can't create new projects on techdis install

Thu Nov 29 13:50:18 GMT 2012

Hi again Simon

I found some instructions about installing xdebug and I'm sure I could do
that but apart from use of it being beyond my comfort zone I'm very wary of
going this route because this techdis server is used for other systems too.
I also only have another hour to look at this right now and then I'll be
offline until much later.

Is there a way of debugging without needing xdebug?

Cheers

Ron

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Ron Mitchell
Sent: 29 November 2012 13:38
To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

Hi Simon

thanks for the suggestion. I have phpstorm installed buthave no knowledge
about how to enable xdebug is that a simple process?

I'll google that now but if you have any suggestions that would be useful.

What worries me is that nothing has changed apart from an over the top
update from svn. I'm using a separate install for testing all this now but
effectively a mirror of the install that has always worked but stopped
working after the latest update. If others were to do this and have the same
problems it would be very bad news.

Cheers

Ron

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Simon Atack
Sent: 29 November 2012 13:24
To: For Xerte technical developers
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

Ron,

I think the only easy way you are going to be able to track this down is
using a debugger.

Set the remote server up to support xdebug (as you say the local setup works
ok).  Run through the code with xdebug enabled and a breakpoint at the point
just as its starting to create a new project step through each instruction
looking at the variables that are set or not.

You can then compare the differences between them ahnd if needed check
further back for what sets things wrong.

Jetbrains phpstorm allows this (I believe Julian gave a key out for the
developers of Xerte to use for this) else notepad++ and even firefox have
plugins for php xdebug support.

Simon

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Ron Mitchell
Sent: 29 November 2012 13:16
To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

It seems to me it failing if there's an incorrect value in the  database for
integrationpath or if it does correctly point to moodle config as in this
case it has always done.

If I create an empty php file and put the path to that in integration path
creating new projects via guest or static still works.

With guest or static enabled creating new projects doesn't work if there's
an incorrect value in that field or a correct value to moodle's config.php
although this does work locally via xampp and has always worked previously
on this server too.

I've lost the will to live with this!

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
Sent: 29 November 2012 12:20
To: For Xerte technical developers
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

> Could this be related to the LTI code? I've tried replacing that folder
with previous version but is that called from somewhere else that might be
causing the problem?

The problem here is that we don't really understand the integration stuff
'cos we've not used it, so Simon isn't too sure how he could rule out the
LTI code as the cause of the problem. but I'd be keen to rule it out, so if
you can explain succinctly what's what that would really help,

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Ron Mitchell
Sent: 29 November 2012 12:00
To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

Integration path is set in the db now for moodle integration and the code in
config.php around line 64 doesn't seem to have changed?

What's confusing is that this works fine via xampp but not on the linux
server and doesn't work even if the value in integration_path isn't to a
proper file/location e.g. if it's to a file that doesn't exist or incorrect
path it still causes the problem.

Could this be related to the LTI code? I've tried replacing that folder with
previous version but is that called from somewhere else that might be
causing the problem?

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Pat Lockley
Sent: 29 November 2012 11:31
To: For Xerte technical developers
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

I didn't change integration path with my stuff? 

Ah hold on.

If you use integration path it uses the moodle session right?

Where is integration path set? 

I suspect it is moodle integration that is killing it - so the new bit I put
into config.php might be killing the integration path session.

Try moving the integration path setting towards the top of config.php

On Thu, Nov 29, 2012 at 11:27 AM, Ron Mitchell <ronm at mitchellmedia.co.uk>
wrote:

Hi all

this continues to be a nightmare but I tested some more very last night and
again this morning and I think I've got a little closer to the issue. 

I installed a brand new clean install elsewhere on the techdis server and
tried that with both guest and static authentication and with those defaults
creating new projects is fine.

However then I restored a database backup from the test installation we've
been using, edited sitedetails and copied accross the use-files and creating
new projects no longer worked. So same code but difference in db.

It seems the problem happens now when there is an integration_path in
sitedetails regardless of the authentication method used. e.g. If i switch
to guest access I can create new projects with integration path empty but I
can't with a correct or incorrect value in integration_path.

What's confusing is that this works locally via xampp with an integration
path. e.g. whether using guest, static or moodle authentication.

Also up to the point that uploading the code broke it the techdis test
installation was working fine with the integration path configured for
moodle integration. Prior to the update obviously creating new projects
hasn't been a problem.

Pat - does that help narrow the issue? 

Cheers

Ron

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Ron Mitchell
Sent: 28 November 2012 23:37

To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

BTW I've noticed that deleting a project, dragging a project, creating a new
folder all have the same affect of clearing the workspace (presumably
killing the session) until refresh.

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of Ron Mitchell
Sent: 28 November 2012 23:31

To: 'For Xerte technical developers'
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

Pat/David/John

thanks for all the responses and suggestions.

I've been trying to resolve this since early afternoon and still no progress
so I'm calling it a night for now :-(

I've been updating the techdis install on practically a daily basis whenever
commits are made and until today this problem simply hasn't materialised.
e.g. after each previous update no problem creating new projects. Something
has screwed it but I just can't find what.

Maybe a new day and fresh start tomorrow will shed some light.

But it would be really good if someone else could test the latest svn code
on a linux setup rather than xampp.

Cheers

Ron

From: xerte-dev-bounces at lists.nottingham.ac.uk
[mailto:xerte-dev-bounces at lists.nottingham.ac.uk] On Behalf Of David Goodwin
Sent: 28 November 2012 22:49
To: For Xerte technical developers
Subject: [Xerte-dev] Re: HELP - can't create new projects on techdis install

You could also perhaps add an 'ob_start()' in near the top if your problem
is actually one of spaces/the session being started too soon; this ought to
stop PHP sending headers/etc before the session starts.

Jesus. That sentence is rubbish. Well, 'the session being started too soon'
bit is at least.

'ob_start()' should delay PHP from sending any output to the browser - and
therefore may help correct any problem related to sessions. I'm pretty sure
there is an implicit 'ob_flush()' at the end of the request.

(I've rarely used ob_start()/ob_flush() so may be wrong).

David.

Also - check the Apache error log file - sometimes it has something of use.

David.

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