Skip to main content

This site requires you to update your browser. Your browsing experience maybe affected by not having the most up to date version.

We're retiring the forums!

The SilverStripe forums have passed their heyday. They'll stick around, but will be read only. We'd encourage you to get involved in the community via the following channels instead:

Template Questions /

Moderators: martimiz, Sean, Ed, biapar, Willr, Ingo, swaiba

Best way to convert string variables in templates


Go to End


5 Posts   2284 Views

Avatar
Tama

Community Member, 138 Posts

8 August 2013 at 11:53am

Hello

A Page Type has the following TextFields:
$Section1Heading
$Section2Heading
$Section3Heading
$Section4Heading
$Section5Heading

I want to be able to display the values of these fields in a template once they have been converted to lowercase and has all non-alphanumeric characters converted to hyphens.

So "What We Do" becomes "what-we-do" - and can be displayed in the template as such. This is so the converted string can be used as a div id for navigation purposes.

I can think of a number of different approaches but not sure which one to take.

Is there a correct or recommended approach for this sort of thing?

Avatar
Willr

Forum Moderator, 5523 Posts

11 August 2013 at 6:07pm

The way I would recommend is a custom getter on your page type. In 3.0 you can pass variables into methods so you only need to define the method once.

public function getFormattedSectionHeading($heading) {
$f = URLSegmentFilter::create();
$t = $f->filter($title);

return DBField::create('Text', $t);
}

Then use $FormattedSectionHeading($Heading) in your template.

You could also create a new DBField subclass and encapsulate this logic on the field type

<?php class MyFormattableVarchar extends Varchar {
public function AwesomeFormat($heading) {
$f = URLSegmentFilter::create();
$t = $f->filter($title);

return DBField::create('Text', $t);
}
}

Then using "Field" => "MyFormattableVarchar" will be possible in $db arrays and your templates will look like $Section1Heading.AwesomeFormat

Avatar
Tama

Community Member, 138 Posts

12 August 2013 at 12:33pm

Edited: 12/08/2013 12:33pm

Thank you for your time Will.

Here's the solution I went for:

/mysite/code/Model/TidyFormatVarchar.php

<?php

class TidyFormatVarchar extends Varchar {

  public function AnchorName() {
    $f = URLSegmentFilter::create();
    $t = $f->filter($this->value);
    return $t;
  }
}

/mysite/code/PageTypes/MyPage.php

class MyPage extends SiteTree {
  public static $db = array(
      'Section1Heading' => 'TidyFormatVarchar',
      'Section2Heading' => 'TidyFormatVarchar',
...

/themes/mytheme/templates/Layout/MyPage.php

<div id="$Section1Heading.AnchorName" class="section-1">

Avatar
kinglozzer

Community Member, 187 Posts

12 August 2013 at 10:09pm

Just for reference, here's an alternative solution I use:

<?php

class StringFieldExtension extends Extension {

	public function CSSSafe() {
		return Convert::raw2url($this->owner->value);
	}

}

Apply the extension, either YAML:

StringField:
  extensions:
    - StringFieldExtension

or _config.php

Object::add_extension('StringField', 'StringFieldExtension');

Then in your templates you can use

<div id="$Section1Heading.CSSSafe" class="section-1">

Avatar
Tama

Community Member, 138 Posts

13 August 2013 at 7:13am

Thank you for posting that up kinglozzer - it's tidier than the approach I used.

I like tidy.