Please try to be more precise. It is impossible to fix a bug if I do not know what the problem is.

When you say "exported, and re-imported" which method of importing and exporting are you using?

Can you attach an example file that leads to broken images when you import it?

Can you write complete steps to reproduce?

To reproduce:
1. Log in to a course as editing teacher
1. Go to question bank
2. Select an empty category or create an empty category
4. Click 'create new question'
4. Select question type 'embedded answers (Cloze)
5. Edit the question eg {:SA:=blah} and insert an image
6. Select question bank/Export
7. Select file format: Moodle XML
8. Select category in which you placed the question created above
9. Click 'Export questions to file'
10. Note the path of the exported file
11. Return to question bank and delete the question
12. Select question bank/Import
13. Select Moodle XML format
14. Click Choose file...
15. Use the file picker to select the xml file exported in step 10.
15. Click import...continue
16. Preview the import question. One sees an image placeholder, but the original image is lost.

The images seem to be correctly embedded in the exported XML file, but are not imported.
The attached exported file I just created on demo.moodle.net, as you suggested.
I don't know the version of this instance, but it fails there too so I presume its 2.3 or 2.4.
The bug is not limited to images but affect any embedded media.

Sorry, I said it appears to be a return of issue MDL-26511, I meant MDL-32865.
I have modified the description.

Hello,
with debugging on I get
Warning: mysqli::real_escape_string() expects parameter 1 to be string, array given in C:\wamp\www\moodle_head\lib\dml\mysqli_native_moodle_database.php on line 868
when I try to import Paul's xml file. Maybe a regression from something else. I will study it.

The problem is that when file_save_draft_area_files is called line 400 of format.php $question->questiontextitemid is an array of objects (object has content, encoding and name properties) !! certainly not what is to be expected
Tim do you remember where a change to this could have been made in cloze code recently ?

I have added Pierre as a watcher.
Pierre, you know a lot about image management in cloze.
Do you see where a change to questiontextitemid could have been made recently ?

Solved ! this is a regression from MDL-37313
I forgot to change one import_files to import_files_as draft in question/format/xml/format.php line 466

linking to issue that caused this regression

This is weird it seems I completely forgot to upgrade part of import_multianswer while working on MDL-37313 and as testing didn't include any cloze question this was completely missed during integration. I think that additionally to fixing this I must include a sample of cloze question in question/format/xml/tests/fixtures to prevent future similar issues !

Thanks for working on this so quickly Jean-Michel. I agree with everything you have said so far.

Created a master branch with fix and 2 new sample files in fixtures.
One is to verify old image tag is correctly imported (both in a non multianswer and in a multianswer question because the code is not the same).
The other one is to verify that multianswer questions with embedded images are correctly imported.

Paul,
Are you able to test if my fix solve your problem (you don't need the new files in question/format/xml/tests/fixtures, you only need the changes I made to question/format/xml/format.php) ?
I already tested that your file questions-CF101-Default for CF101-20130404-1836.xml is correctly imported with the fix, but testing on other files you may have would be a confirmation.

Thanks very much for your rapid response Jean-Michel!

We are not set up as Moodle developers but I assume we can test V2.3.4 by grabbing the 3 modified source files from your diff? To test v2.4 I assume we need to wait for this fix to be propagated?

We inserted your modified file:
moodle /question/format/xml/format.php

into our installations:

Moodle 2.3.4+ (Build: 20130222) and
Moodle 2.4.1+ (Build: 20130222)

The issue seems to be fixed in each case.

Thank you!

Thanks Paul,
Submitting for peer review.

Hello Tim,
Can look at this ? I will do other branchs and write testing instructions during the weekend.

+1 patch looks great.

Once you have backported, and done testing instructions, I will submit for integration.

Hello Tim,
I think this is ready for integration.
Just a note: currently xml files produced when exporting questions don't have a final end of line (this can be seen on the diff pages) when I use such files as samples, I don't know if I should add a final end of line to make them conform to coding style or let them as they are so that they are "real" sample files.

Submitting for integration.

I asked myself the same question about the example files when I peer reviewed this the first time, and I could not decide on the answer. I think what you have done (real example files) is good.

Integrated to master, 24 and 23 - thanks Jean-Michel!

Thanks again to all.

Thanks again Jean for your contribution. Works as expected, passing.

Blooming Marvelous! It's time for a knees up - your changes are upstream!

Thanks for making Moodle better!

Toodle pip