If your blog is more of a reference than a diary, why do you organise your posts in a timeline? Instead group them by category.

Friday, July 24th, 2015 in Snippets

Let’s all turn off on-site commenting, and allow replies via moderated trackback. Anyone can start a blog and participate with increased civility and ownership. DONE.

Thursday, July 23rd, 2015 in Snippets

Enum label lookup

In your datamodel you might have a Enum field such as this date-based dropdown:

public static $db = array(
    "Year"        => "Enum('2013, 2014, 2015')"
}

Internally, SilverStripe stores the index, so that when you retrieve the value in methods such as onBeforeWrite, instead of 2013 you will receive 1. Use the function below to retrieve the label of the Enum:

public function EnumLabel($field_name) {
    $enumValues = $this->dbObject($field_name)->enumValues();
    $label    = $enumValues[$this->$field_name];
    return $label;
}

// $year = $this->EnumLabel('Year');

Thursday, July 23rd, 2015 in SilverStripe

LessThanOrEqual in SilverStripe 3.0

When adding a filter on a DataList sometimes you need to do a <= rather than a <. Unfortunately the LessThanOrEqual and GreatherThanOrEqual search filters do not exist in SilverStripe 3.0.x, they were added in 3.1.

Therefore we have to write our own where clause like the following example:

// Return all the sessions on or before the $date
$sessions = new DataList('AcademicSession');
$sessions = $sessions->where('"SessionStartDate" <= \'' . $date . '\'');

Thursday, July 23rd, 2015 in SilverStripe

#iosstorymode “the best of the year of high quality of life and the other hand is the only thing that would have to go back.”

Thursday, July 16th, 2015 in Snippets

#iosstorymode Open a new note, enter the first word, then keep pressing the text suggestions button and see what stream of consciousness erupts.

Thursday, July 16th, 2015 in Snippets

Tip: disable IFTT URL shorthening via account > preferences > URL Shorthening to post meaningful URLs to Twitter et al.

Friday, July 10th, 2015 in Snippets

How to provide and manage your own permissions

At some point on your journey through the jungle that is SilverStripe, you will want to create permissions and assign users to them. You might have created a Page Category model admin to categorise your pages, and setup the relations between pages and their category. By default when you create a category as an admin they will not be visible to any content authors and any content authors that can access the model admin can’t create any new items.

The solution to this dilemma is to create a new permission (for example PROJECT_CategoryAdmin) and then let people with that permission mange the category items. This is how to go about it:

Create the permission

You will need to tell SilverStripe you are implementing permission by changing the class declaration as follows (changes in bold):

class Category extends DataObject implements PermissionProvider

To create the new permission you will have to write a providePermissions() method for the Category class:

      public function providePermissions() {
        return array(
            "PROJECT_CategoryAdmin" => array(
                'name' => 'Administer categories',
                'category' => 'PROJECT',
                'help' => 'Manage categories.'
            )
        );
    }

Finally, implement the permission by declaring the canCreate, canDelete, canEdit and canView methods to your liking:

    public function canCreate($member = null) {
        return Permission::check('PROJECT_CategoryAdmin');
    }

    public function canDelete($member = null) {
        return Permission::check('PROJECT_CategoryAdmin');
    }

    public function canEdit($member = null) {
        return Permission::check('PROJECT_CategoryAdmin');
    }

    public function canView($member = null) {
        return Permission::check('PROJECT_CategoryAdmin') ;
    }

Don’t forget to create a Role and/or assign the permission to the right Group(s), to make sure the right users can manage your categories.

Tuesday, July 7th, 2015 in SilverStripe