Use a controller variable in a custom kirbytag

Kirby 3 Questions 🤔
1

Hi there,

I have written a custom kirbytag that needs to access a variable that is set up in a controller. However, when I try to use this variable in my kirbytag snippet plugin, it lets me know

Undefined variable: foo

How can I use such a variable in the kirbytag snippet plugin?

Thanks!

1 Like
2

Hm, the Kirbytag inside your plugin doesn’t know anything about your controller or the variables inside it.

Do you want to get the data from a particular controller?

3

Yes, exactly. I have a controller home.php and would like certain kirbytags that appear on text blocks of my home page to work with data from this controller at the time of their parsing.

4

I’d try and require the controller in the kirbytag code:

$controller = kirby()->controller('controllername');

You might have to pass the objects you need in the controller as array of arguments.

5

How do I do this? I would need the page object, but how can I even access this from within a kirbytag?

6 
$tag->parent()

Gives you the page context for the page where the kirbytag is used.

7

Ok and how do I pass the objects as an array? If I try this, then I get an null error for the page object within the controller code:

$controller = kirby()->controller('home', [$tag->parent()]);

Also, if I could easily access the page object from the kirbytag, is there not maybe an easier way to store the data that I need within the page object somehow and then access it from the kirbytag like that? I mean, I don’t have to use a controller, if there are easier ways.

8 
$controller = kirby()->controller('home', ['page' => $tag->parent()]);

I don’t know what you are up to, you asked for the controller…

So if you tell me/us, what you want to achieve, maybe we can find a better solution.

9

I have a page with a blocks field. Before I do any rendering to the page, I need to loop over all the blocks to retrieve certain information about it and collect it into an array. I do this in the controller (as it is the most appropriate place to do so).

Then, I start rendering all those blocks, including some blocks that include my kirbytag that accesses information from the array that I collected before.

I got it to work now with the kirby()->controller('home', ['page' => $tag->parent()]); way, you suggested above. However, if there is an easier (and maybe also cheaper) way to get the same thing done, I would be interested.

Thanks!

10

What I don’t understand is why you need these Kirbytags in the first place?

11

What do you mean? What I need them for specifically?
Those are Kirbytags that link you to an image within the text (something like Fig. 1: A Mountain). And I need the controller variable to first run over all the images within my block to actually figure out the number for each image. Once I have done this in the controller, I can then target these images via a slug field I set up for each of them. So I use my kirbytag like this

(fig: a-mountain)

And it then gets the correct number automatically. As I said, very open for suggestions to solve this somehow more easily.