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+--- Thread: Leveraging "load->_ci_cached_vars" array in libraries (/showthread.php?tid=34069)
Leveraging "load->_ci_cached_vars" array in libraries - El Forum - 09-17-2010
[eluser]neal789[/eluser]
Just wondering if anyone sees any downside to leveraging the _ci_cached_vars method of the CI_Loader class as a substitute for passing variables from my controllers into library functions?
It seems like I could clean up my code a lot and not need to worry about passing in session information to libraries if I just access the load->_ci_cached_vars array within my libraries to get user information. Can I depend on that array being correct? Is there any downside or risk?
Thanks for any input.
Leveraging "load->_ci_cached_vars" array in libraries - El Forum - 09-17-2010
[eluser]Pascal Kriete[/eluser]
Could you give us an example? Why don't you just make a "settings" library, or use the session or config lib?
_ci_cached_vars is a strange choice, it's just going to litter your view scope with variables.
Leveraging "load->_ci_cached_vars" array in libraries - El Forum - 09-17-2010
[eluser]neal789[/eluser]
Thanks for the reply Pascal Kriete.
I don't have a specific code example to give, but for all logged in users on the site I grab a rather large "profile" object at the start of each controller. I want it to be available to me within that request no matter what library or model I'm in. And I want to do it without constantly passing the object around.
The profile object is too large to cookie, so adding it to the session cookie is not an option. I could create a settings library, but I think that the config library might be the way to go. I didn't realize that I could add to that dynamically. I'm afraid I don't understand the term "view scope" so I didn't understand your last comment, but let me know if this shed any more light on what I'm talking about and if you think I'm on the right track.
Thanks
Leveraging "load->_ci_cached_vars" array in libraries - El Forum - 09-17-2010
[eluser]Pascal Kriete[/eluser]
_ci_cached_vars is used to store the current view variables.
So both of these examples add to _ci_cached_vars
Code:
$data = array('foo' => 'bar');
$this->load->view('name', $data);
// or
$this->load->vars($data);That array is then extracted when the view is loaded. Which means that in the view, you have access to the variables in _ci_cached_vars.
It sounds like your on the right track. I personally like keeping that kind of stuff separate from CI's session and config data arrays. So I would probably extend the session or config library to add a nice getter for profile data.
Code:
$user_language = $this->session->user_profile('language', 'english');Something like:
Code:
class MY_Session extends CI_Session {
var $profile = array();
function MY_Session($params = array())
{
parent::CI_Session($params);
$this->_fetch_profile();
}
function _fetch_profile()
{
$query = $this->CI->db->get_where('profile', array('foo' => 'bar'));
$this->profile = $query->row_array();
}
function user_profile($key, $default = FALSE)
{
if (array_key_exists($key, $this->profile))
{
return $this->profile[$key];
}
return $default;
}
}Leveraging "load->_ci_cached_vars" array in libraries - El Forum - 09-17-2010
[eluser]neal789[/eluser]
That looks like a very elegant solution. I'm going to take your advice and run with it.
Thanks so much for your input.
Neal