Search engine error and "Using $this when not in object context"

kkllii99 · Post by **kkllii99** » Mon Sep 10, 2018 7:05 pm

This happened a few days after a) PHP version was updated to 7.2, b) I added items to the main menu and c) switched the position of Search module in the template. So far I haven't found any resolution to this from the this forum or figured it out myself, so I must ask.

When I try to search for something on the site (not in the administrator side), it gives an Error 0 message with this line: "Using $this when not in object context". No other explanation/description is given.

SharkyKZ · Post by **SharkyKZ** » Mon Sep 10, 2018 7:15 pm

Enable debug to see where it's coming from.

kkllii99 · Post by **kkllii99** » Mon Sep 10, 2018 7:28 pm

I did, but it doesn't show anything additional on the error page, just the same.

kkllii99 · Post by **kkllii99** » Mon Sep 10, 2018 7:54 pm

Oddly enough, if you search for only two characters, it will display the search results and tell you to search for at least 3 characters. But then it doesn't work when you do.

Post by **pe7er** » Mon Sep 10, 2018 8:15 pm

This issue appeared in the random image module of Joomla 3.8.8 (and was solved with Joomla 3.8.9 with https://github.com/joomla/joomla-cms/pull/20533 ). However, some 3rd party extensions might also cause this problem.

Make sure that you have the latest Joomla version (currently 3.8.12) and that you have updated all your 3rd party extensions.

Do you use a template override for the com_search component?

kkllii99 · Post by **kkllii99** » Mon Sep 10, 2018 8:18 pm

How can I check if I do use template override for it? (English is not my first language, so something might be lost in translation).

I tried to update all the 3rd party extensions, they should be up to date. Random image module is not in use (unpublished).

Thanks very much!

Post by **pe7er** » Mon Sep 10, 2018 8:22 pm

Check your /templates/your-template/html/ folder if it contains a folder /com_search/
If it does, then it might have a template override for the search component.

A background article about template overrides: https://docs.joomla.org/How_to_override ... omla!_core

kkllii99 · Post by **kkllii99** » Mon Sep 10, 2018 9:14 pm

There is no such folder...

kkllii99 · Post by **kkllii99** » Wed Sep 12, 2018 7:37 am

So it seems that the search might work for once after doing some changes to the main menu (for example, unpublishing a menu item). And after that it stops working again. No idea of how to fix this.

SharkyKZ · Post by **SharkyKZ** » Wed Sep 12, 2018 7:49 am

Are you sure you have correctly enabled debug? With debug enabled error page should show a backtrace. Are you using default template?

kkllii99 · Post by **kkllii99** » Wed Sep 12, 2018 7:59 am

Yes, I enabled debug from control panel. Then if I use the search, the error page won't give any more information than it does when debug is not in use.

kkllii99 · Post by **kkllii99** » Wed Sep 12, 2018 8:04 am

But on the other pages, the debug shows that there are multiple database inquiries, for example:

"SELECT m.*,e.element

FROM mmp_j25_menu AS m

LEFT JOIN mmp_j25_extensions AS e
ON m.component_id = e.extension_id

WHERE m.menutype = 'main'
AND m.client_id = 1
AND m.id > 1
AND (e.enabled = 1 OR e.enabled IS NULL)

ORDER BY m.lft

Selite
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE m ref PRIMARY,idx_client_id_parent_id_alias_language,idx_menutype idx_client_id_parent_id_alias_language 1 const 32 100.00 Using index condition; Using where; Using filesort
1 SIMPLE e eq_ref PRIMARY PRIMARY 4 int48126_uusi.m.component_id 1 100.00 Using where"

kkllii99 · Post by **kkllii99** » Wed Sep 12, 2018 8:40 am

Well, somehow it seems to be working now. I also installed AJAX Search plugin which also is working now, at first it couldn't load any results.

PekkaK · Post by **PekkaK** » Fri Oct 19, 2018 12:11 pm

I have the same issue with search module after upgrading from PHP 5.6 to PHP 7.1/7.2. Everything else seems to work fine. It looks like this happens when the search has no results, otherwise the results are displayed just fine. Any update on this issue?

PekkaK · Post by **PekkaK** » Fri Oct 19, 2018 2:24 pm

I noticed that problem was failing search components e.g. MijoPolls. After disabling a few search components, everything works fine.

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