Initial blank value appended to @SELECT Binding - My Forums

Re: Initial blank value appended to @SELECT Binding

designcouch — Oct 30, 2015, 08:54 AM

Ok, so REALLY old post, but to me the simplest solution is to add a blank space in the 'default value' textbox for your TV. Eliminates all code hacks, and works well across all versions of MODX.

Re: Initial blank value appended to @SELECT Binding

himmdesign — Nov 24, 2014, 01:36 PM

Here is what I'm using for a listbox selector to typeahead search resources.

@SELECT '' AS `name` ,'' AS `id` FROM `[[+PREFIX]]site_content`  UNION SELECT `pagetitle` AS `name`,`id` FROM `[[+PREFIX]]site_content` WHERE `published` = 1 AND `deleted` = 0

Re: Initial blank value appended to @SELECT Binding

aladage — Jun 07, 2010, 11:29 AM

Figured it out! I just set the collations in the first SELECT statement and it eliminated the "mixed collations" error:

@SELECT _latin1 '' COLLATE latin1_swedish_ci AS pagetitle, _latin1 '' COLLATE latin1_swedish_ci AS id FROM vid_site_content UNION SELECT pagetitle, id FROM vid_site_content WHERE parent='5' AND published='1' ORDER BY pagetitle ASC;

Again, I’m not a pro at this, so let me know if there’s a reason not to do it this way.

Re: Initial blank value appended to @SELECT Binding

aladage — Jun 04, 2010, 02:59 PM

Thanks. That might be what I end up doing. I guess I just don’t understand encodings well enough. I’m not sure why it matters if I’m using UNION on the same table. How can the same table have two collations?

Re: Initial blank value appended to @SELECT Binding

anonymized-26931 — Jun 04, 2010, 02:53 PM

Any ideas on this? What I don’t understand is, I’m selecting from the same table twice. How could there be two different collations?

hmm, found this: http://modxcms.com/forums/index.php/topic,39581.msg239358.html#msg239358

Re: Initial blank value appended to @SELECT Binding

aladage — Jun 04, 2010, 02:40 PM

Another thought: would it be easier to just use an @EVAL binding for this instead of a @SELECT? I’ve tried but didn’t any better luck. I’m still a little unsure of how the @bindings in a TV’s Input Option Values field translates it into options in a TV drop-down.

Re: Initial blank value appended to @SELECT Binding

aladage — Jun 04, 2010, 02:35 PM

Thanks for the reply and example (I couldn’t find that anywhere on the forums!). However, I’m getting a really strange error when I use this code (modified for my site):

@SELECT '' AS pagetitle FROM vid_site_content UNION SELECT pagetitle FROM vid_site_content WHERE parent='5' ORDER BY pagetitle ASC;

The error looks like this:

Execution of a query to the database failed - Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation 'UNION' »
      SQL: SELECT '' AS pagetitle FROM vid_site_content UNION SELECT pagetitle FROM vid_site_content WHERE parent='5' ORDER BY pagetitle ASC;

Any ideas on this? What I don’t understand is, I’m selecting from the same table twice. How could there be two different collations?

Re: Initial blank value appended to @SELECT Binding

anonymized-26931 — Jun 04, 2010, 12:19 PM

for an initial blank first option you can use this (e.g.):

@SELECT '' AS pagetitle FROM modx_site_content UNION SELECT pagetitle FROM modx_site_content WHERE parent=4

(found it somewhere on the forum)

Re: Initial blank value appended to @SELECT Binding

aladage — Jun 04, 2010, 11:25 AM

I realize this is an older post, but is this still the best method for doing this?

Re: Initial blank value appended to @SELECT Binding

mstolley — Jul 30, 2009, 04:48 PM

This is a jQuery solution I wrote that works really well. I placed this in the header include for the manager index page - of course, you will have to edit the selectors according to your values.

$("select#tvcontainsPatterns\\[\\]").after("
Clear selections");
$("a#clear_tvcontainsPatterns\\[\\]").click(function() {
	$("select#tvcontainsPatterns\\[\\]").children("option:selected").removeAttr("selected");
	return false;
});

It searches for your specified select html and appends a link below it that states "Clear selections". When this link is clicked, it removes the selected attribute from the specifed select’s options.