Re: Proper MVC location for a function and its call
On Fri, Aug 3, 2012 at 9:22 AM, kevin.ncbible wrote:
>
> A. That was it. So, it makes sense doesn't it, that when you're in the
> model you do not need to reference the model, so $this->getPath(...) is
> enough. So, in MVC terminology, I'm using the model to retrieve the data.
Yes, that's right. In any class, $this refers to the instantiated object.
> re: Set, although I had read about it, I also was not getting the
> significance of set to the MVC pattern. I assume that is the main reason,
> for instance, that I would not be calling a function FROM the view: it's
> more like the Model and Controller are pushing (I'm sure there's a better
> word) the data to the view.
Yes, that's a very good way of putting it. The set() method makes
variables available to the View object. More specifically, it add the
var to the controller's $viewVars array, which Cake makes available to
View.
> Now, in my case, the $id value for a particular topic is available in the
> view or edit action, but not in the index or add action. So you've really
> helped me with making the "level" variable available to the view or edit
> action. What if, however, for the index page, I had the $id available, but
> only via a request param. Would that be a case where set would not work and
> I would have to somehow call the getLevel function right from the view?
> A. I guess I do have $id available, in the index action, via $id =
> $this->request->params['named']['id']; Then I could go ahead and use
> $this->set('level', $this->TopicTree->getLevel($id)); Does that make sense?
> I'll have to try that!
Tentatively, yes. I couldn't say for sure without knowing more about
what you're doing.
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Re: Proper MVC location for a function and its call
cricket:
A. That was it. So, it makes sense doesn't it, that when you're in the
model you do not need to reference the model, so $this->getPath(...) is
enough. So, in MVC terminology, I'm using the model to retrieve the data.
re: Set, although I had read about it, I also was not getting the
significance of set to the MVC pattern. I assume that is the main reason,
for instance, that I would not be calling a function FROM the view: it's
more like the Model and Controller are pushing (I'm sure there's a better
word) the data to the view.
Now, in my case, the $id value for a particular topic is available in the
view or edit action, but not in the index or add action. So you've really
helped me with making the "level" variable available to the view or edit
action. What if, however, for the index page, I had the $id available, but
only via a request param. Would that be a case where set would not work and
I would have to somehow call the getLevel function right from the view?
A. I guess I do have $id available, in the index action, via $id =
$this->request->params['named']['id']; Then I could go ahead and
use $this->set('level', $this->TopicTree->getLevel($id)); Does that make
sense? I'll have to try that!
As you can see, I'm trying to get my head around MVC patterns, how they
play out on the practical level. Thank you, cricket and others, so very
much, for helping me to do this!
Kevin
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Re: Proper MVC location for a function and its call
With the method in the model, be sure to change this line:
$this->TopicTree->getPath(...)
to:
$this->getPath(...)
If you want the value in the view, you should use set() in the controller:
$this->set(
'level',
$this->TopicTree->getLevel($id)
);
This creates a variable that View can access as $level.
Tip: if you have debug set to 1 or 2 (avoid 3 as it creates far too
much info and is best left for serious debugging problems) you can do
this in a model, controller, or view:
die(debug($some_var));
On Thu, Aug 2, 2012 at 11:56 AM, kevin.ncbible wrote:
> Tarique: Thank you, so much.
>
> Yes, this is just being used by the one model. (If it was being used by
> more, then where would I put it?)
>
> So, per your instruction, I placed $this->TopicTree->getLevel($id); in one
> of my controller functions and successfully call it from a view. It in turn
> successfully passes the id and calls the function (confirmed by debug) I
> have in my model. But the function, when places in the model, does not
> return any data as it did when it was placed in the controller. What am I
> missing? I'm very new, so it will be very obvious!
>
> Here, as above, is the function, in TopicTree model, I'm successfully
> calling from my controller.
>
> public function getlevel($id=null) {
> $count = count($this->TopicTree->getPath($id,array('TopicTree.id')))-1;
> return $count;
> }
>
> Is the problem that the function, now that it is in the model and not the
> controller, does not know which data to access?
>
> I do, so very much, appreciate your help.
>
> Kevin
>
> --
> Our newest site for the community: CakePHP Video Tutorials
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Re: Proper MVC location for a function and its call
Tarique: Thank you, so much.
Yes, this is just being used by the one model. (If it was being used by
more, then where would I put it?)
So, per your instruction, I placed $this->TopicTree->getLevel($id); in one
of my controller functions and successfully call it from a view. It in turn
successfully passes the id and calls the function (confirmed by debug) I
have in my model. But the function, when places in the model, does not
return any data as it did when it was placed in the controller. What am I
missing? I'm very new, so it will be very obvious!
Here, as above, is the function, in TopicTree model, I'm successfully
calling from my controller.
public function getlevel($id=null) {
$count = count($this->TopicTree->getPath($id,array('TopicTree.id')))-1;
return $count;
}
Is the problem that the function, now that it is in the model and not the
controller, does not know which data to access?
I do, so very much, appreciate your help.
Kevin
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Re: Proper MVC location for a function and its call
Will this function be used by just one model - TopicTree? ? If yes
then put it in model and call it from the controller
$this->TopicTree->getLevel($id);
HTH
Tarique
On Thu, Aug 2, 2012 at 8:22 AM, kevin.ncbible wrote:
> Hello. Thank you, so very much, for you time and expertise.
>
> I am just getting started with PHP, MVC, and CakePHP. Having read through
> the documentation, I'm still confused about how, where to do things with
> proper MVC. I have a function for a TreeBehavior that returns the level of a
> node in the tree (1, 2, 3, etc.) based upon getPath() method.
>
> /**
> * getlevel
> *
> * @param int $id
> * @return int
> */
> public function getlevel($id=null) {
> // Count of array items, minus one, will tell me the level of the node
> $count = count($this->TopicTree->getPath($id,array('TopicTree.id')))-1;
> // debugger::dump($count); die;
> return $count;
> }
>
> The function works with debugger::dump($count); die;, producing a result,
> e.g.: (int) 4
>
> Now, I would like to use that returned value in the controller's edit and
> add actions, to insert into the database this value in a "level" field.
>
> I want to use proper MVC approach. So, where does this function reside (in
> the TopicTree Model?) and where do I call it (from the edit and add actions
> of the TopicTreesController?) ?
>
> Maybe this is an entirely different issue, but would your answer change if I
> also wanted to use the function to, say, include the level in the Title of
> the index view?
>
> So confused, but really do want to learn how to do this right!
>
> Thank you!!
>
> Kevin
>
> --
> Our newest site for the community: CakePHP Video Tutorials
> http://tv.cakephp.org
> Check out the new CakePHP Questions site http://ask.cakephp.org and help
> others with their CakePHP related questions.
>
>
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Proper MVC location for a function and its call
Hello. Thank you, so very much, for you time and expertise.
I am just getting started with PHP, MVC, and CakePHP. Having read through
the documentation, I'm still confused about how, where to do things with
proper MVC. I have a function for a TreeBehavior that returns the level of
a node in the tree (1, 2, 3, etc.) based upon getPath() method.
/**
* getlevel
*
* @param int $id
* @return int
*/
public function getlevel($id=null) {
// Count of array items, minus one, will tell me the level of the node
$count = count($this->TopicTree->getPath($id,array('TopicTree.id')))-1;
// debugger::dump($count); die;
return $count;
}
The function works with debugger::dump($count); die;, producing a result,
e.g.: (int) 4
Now, I would like to use that returned value in the controller's edit and
add actions, to insert into the database this value in a "level" field.
I want to use proper MVC approach. So, where does this function reside (in
the TopicTree Model?) and where do I call it (from the edit and add actions
of the TopicTreesController?) ?
Maybe this is an entirely different issue, but would your answer change if
I also wanted to use the function to, say, include the level in the Title
of the index view?
So confused, but really do want to learn how to do this right!
Thank you!!
Kevin
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