Problem with the $page->find(); function

[adinuno]

Hi there,

I am struggling with a very simple variable. I'm using the following function to get the url of a certain child:

<?php echo $page->find("projects")->url ?>
 

But it returns an error:

Error: Exception: Unknown Selector operator: '' -- was your selector value properly escaped? (in /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Selectors.php line 165)

#0 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Selectors.php(190): Selectors->create('projects', '', '')
#1 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Selectors.php(63): Selectors->extractString('has_parent=1, p...')
#2 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Pages.php(143): Selectors->__construct('has_parent=1, p...')
#3 [internal function]: Pages->___find('has_parent=1, p...', Array)
#4 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Wire.php(271): call_user_func_array(Array, Array)
#5 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Wire.php(229): Wire->runHooks('find', Array)
#6 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Page.php(786): Wire->__call('find', Array)
#7 /Applications/XAMPP/xamppfiles/htdocs/cms/wire/core/Page.php(786): Pages->find('has_parent=1, p...', Array)
#8 /Applications/XAMPP/xa

This error message was shown because you are logged in as a Superuser. Error has been logged.
 

The page called 'projects' exists, what could be the problem?

Thanks in advance

[adrian]

Try this:

<?php echo $page->find("name=projects")->url ?>

or you can use the path of the page, eg. if it is at the root of you site you can do:

<?php echo $page->find("/projects/")->url ?>

Also, be sure to install the selector test module - will help you figure out the right selector more easily:

http://modules.processwire.com/modules/process-selector-test/

EDIT: Be sure to take nik's advice below about get vs find!

[nik]

Hi Gespinha,

ProcessWire is trying to tell you that "projects" is not a valid selector. See http://processwire.com/api/selectors/ on how to write selectors, this being the key here: "An individual selector consists of three parts: the field you are looking for, an operator (like an equals '=' sign), and the value you want to match. For example, a basic selector might be: title=products".

So you could use for example "name=products". But just fixing the selector is not enough here; you're using find() which returns a PageArray (even if there's just one match), not a single Page. If you're trying to get a specific page, you could use get() instead. It works like find() but returns only the first match (a Page object). Or you could say find()->first()->url to access the first found Page inside the returned PageArray.

[adinuno]

Thanks guys, you have, once again, solved the problem