2011-02-07 07:48:44 +01:00
|
|
|
|
# Page Types
|
|
|
|
|
|
|
|
|
|
## Introduction
|
|
|
|
|
|
|
|
|
|
Page Types are the basic building blocks of any SilverStripe website. A page type can define:
|
|
|
|
|
|
|
|
|
|
* The template or templates that are used to display content
|
|
|
|
|
* What fields are available to edit in the CMS
|
|
|
|
|
* Behaviour specific to a page type – for example a contact form on the ‘Contact Us’ page that sends an email
|
|
|
|
|
when the form is submitted
|
|
|
|
|
|
|
|
|
|
All the pages on the base installation are of the page type "Page". See
|
|
|
|
|
[tutorial:2-extending-a-basic-site](/tutorials/2-extending-a-basic-site) for a good introduction to page-types.
|
|
|
|
|
|
2011-04-18 11:11:09 +02:00
|
|
|
|
## Page type templates
|
|
|
|
|
|
2011-02-07 07:48:44 +01:00
|
|
|
|
Each page type on your website is a sub-class of the SiteTree class. Usually, you’ll define a class called ‘Page’
|
2011-04-18 11:11:09 +02:00
|
|
|
|
and use this template to lay out the basic design elements that don’t change.
|
2011-02-07 07:48:44 +01:00
|
|
|
|
|
|
|
|
|
Why do we sub-class Page for everything? The easiest way to explain this is to use the example of a search form. If we
|
|
|
|
|
create a search form on the Page class, then any other sub-class can also use it in their templates. This saves us
|
|
|
|
|
re-defining commonly used forms or controls in every class we use.
|
|
|
|
|
|
|
|
|
|
![](_images/pagetype-inheritance.png)
|
|
|
|
|
|
|
|
|
|
Each page type is represented by two classes: a data object and a controller. In the diagrams above and below, the data
|
|
|
|
|
objects are black and the controllers are blue. The page controllers are only used when the page type is actually
|
|
|
|
|
visited on the website. In our example above, the search form would become a method on the ‘Page_Controller’ class.
|
|
|
|
|
Any methods put on the data object will be available wherever we use this page. For example, we put any customizations
|
|
|
|
|
we want to do to the CMS for this page type in here.
|
|
|
|
|
|
|
|
|
|
![](_images/controllers-and-dataobjects.png)
|
|
|
|
|
|
|
|
|
|
Page types are created using PHP classes. If you’re not sure about how these work, [click here for a gentler
|
|
|
|
|
introduction to PHP classes](http://www-128.ibm.com/developerworks/opensource/library/os-phpobj/).
|
|
|
|
|
|
2011-03-08 22:05:51 +01:00
|
|
|
|
We put the Page class into a file called Page.php inside `mysite/code`. We also put Page_Controller in here. Any other
|
2011-02-07 07:48:44 +01:00
|
|
|
|
classes that are based on Page – for example, the class Page_AnythingElse will also go into Page.php. Likewise, the
|
|
|
|
|
StaffPage_Image class will go into StaffPage.php.
|
|
|
|
|
|
2011-04-18 11:11:09 +02:00
|
|
|
|
## Templates
|
|
|
|
|
|
|
|
|
|
Take a look at mysite/templates/Page.ss. It contains standard HTML markup, with some differences. We’ll go over
|
|
|
|
|
these later, but for now, you can see that this file only generates some of the content – it sets up the
|
|
|
|
|
`<html>` tags, deals with the `<head>` section, creates the first-level navigation, and then closes it all off again.
|
|
|
|
|
See $Layout? That’s what is doing most of the work when you visit a page. Now take a look at `mysite/templates/Layout/Page.ss`.
|
|
|
|
|
This as you can see has a lot more markup in it – it’s what is included into $Layout when the ‘Page’ page type is rendered.
|
|
|
|
|
Similarly, `mysite/templates/Layout/HomePage.ss` would be rendered into $Layout when the ‘HomePage’ page type is selected for the
|
|
|
|
|
current page you’re viewing.
|
|
|
|
|
|
|
|
|
|
See the [Page Type Templates](/topics/page-type-templates) page for more information.
|
|
|
|
|
|
2011-02-07 07:48:44 +01:00
|
|
|
|
## Adding database-fields
|
|
|
|
|
|
|
|
|
|
Adding database fields is a simple process. You define them in an array of the static variable `$db`, this array is
|
|
|
|
|
added on the object class. For example, Page or StaffPage. Every time you run db/build to recompile the manifest, it
|
|
|
|
|
checks if any new entries are added to the `$db` array and adds any fields to the database that are missing.
|
|
|
|
|
|
|
|
|
|
For example, you may want an additional field on a StaffPage class which extends Page, called Author. Author is a
|
|
|
|
|
standard text field, and can be [casted](/topics/datamodel) as a variable character object in php (VARCHAR in SQL). In the
|
|
|
|
|
following example, our Author field is casted as a variable character object with maximum characters of 50. This is
|
|
|
|
|
especially useful if you know how long your source data needs to be.
|
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
class StaffPage extends Page {
|
|
|
|
|
|
|
|
|
|
static $db = array(
|
|
|
|
|
'Author' => 'Varchar(50)'
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
class StaffPage_Controller extends Page_Controller {
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
See [datamodel](/topics/datamodel) for a more detailed explanation on adding database fields, and how the SilverStripe data
|
|
|
|
|
model works.
|
|
|
|
|
|
|
|
|
|
## Adding formfields and tabs
|
|
|
|
|
|
|
|
|
|
See [form](/topics/forms) and [tutorial:2-extending-a-basic-site](/tutorials/2-extending-a-basic-site)
|
|
|
|
|
|
|
|
|
|
## Removing inherited form fields and tabs
|
|
|
|
|
|
|
|
|
|
### removeFieldFromTab()
|
|
|
|
|
|
2011-10-28 03:37:27 +02:00
|
|
|
|
Overloading `getCMSFields()` you can call `removeFieldFromTab()` on a `[api:FieldList]` object. For example, if you don't
|
2011-03-08 22:05:51 +01:00
|
|
|
|
want the MenuTitle field to show on your page, which is inherited from `[api:SiteTree]`.
|
2011-02-07 07:48:44 +01:00
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
class StaffPage extends Page {
|
|
|
|
|
|
|
|
|
|
function getCMSFields() {
|
|
|
|
|
$fields = parent::getCMSFields();
|
2011-04-15 06:36:22 +02:00
|
|
|
|
$fields->removeFieldFromTab('Root.Content', 'MenuTitle');
|
2011-02-07 07:48:44 +01:00
|
|
|
|
return $fields;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
class StaffPage_Controller extends Page_Controller {
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### removeByName()
|
|
|
|
|
`removeByName()` for normal form fields is useful for breaking inheritance where you know a field in your form isn't
|
|
|
|
|
required on a certain page-type.
|
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
class MyForm extends Form {
|
|
|
|
|
|
|
|
|
|
function __construct($controller, $name) {
|
2011-10-28 03:37:27 +02:00
|
|
|
|
// add a default FieldList of form fields
|
2011-02-07 07:48:44 +01:00
|
|
|
|
$member = singleton('Member');
|
|
|
|
|
|
|
|
|
|
$fields = $member->formFields();
|
|
|
|
|
|
|
|
|
|
// We don't want the Country field from our default set of fields, so we remove it.
|
|
|
|
|
$fields->removeByName('Country');
|
|
|
|
|
|
2011-10-28 03:37:27 +02:00
|
|
|
|
$actions = new FieldList(
|
2011-02-07 07:48:44 +01:00
|
|
|
|
new FormAction('submit', 'Submit')
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
parent::__construct($controller, $name, $fields, $actions);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
This will also work if you want to remove a whole tab e.g. $fields->removeByName('Metadata'); will remove the whole
|
|
|
|
|
Metadata tab.
|
|
|
|
|
|
|
|
|
|
For more information on forms, see [form](/topics/forms), [tutorial:2-extending-a-basic-site](/tutorials/2-extending-a-basic-site)
|
|
|
|
|
and [tutorial:3-forms](/tutorials/3-forms).
|
|
|
|
|
|
|
|
|
|
## Creating a new page:
|
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
$page = new Page();
|
|
|
|
|
$page->ParentID = 18; //if you want it to be a child of a certain other page...
|
|
|
|
|
$page->Title = "Crazy page";
|
|
|
|
|
$page->MetaTitle = "madness";
|
|
|
|
|
$page->PageTitle = "Funny";
|
|
|
|
|
$page->writeToStage('Stage');
|
|
|
|
|
$page->publish('Stage', 'Live');
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## Updating a page:
|
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
$page = DataObject::get_one("Page", "ParentID = 18");
|
|
|
|
|
$page->Title = "More Serious";
|
|
|
|
|
$page->writeToStage('Stage');
|
|
|
|
|
$page->Publish('Stage', 'Live');
|
|
|
|
|
$page->Status = "Published";
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## Deleting pages:
|
|
|
|
|
|
|
|
|
|
:::php
|
|
|
|
|
$pageID = $page->ID;
|
|
|
|
|
$stageRecord = Versioned::get_one_by_stage('SiteTree', 'Stage', "SiteTree.ID = $pageID");
|
|
|
|
|
if ($stageRecord) $stageRecord->delete();
|
|
|
|
|
$liveRecord = Versioned::get_one_by_stage('SiteTree', 'Live', "SiteTree_Live.ID = $pageID");
|
2011-03-08 22:05:51 +01:00
|
|
|
|
if ($liveRecord) $liveRecord->delete();
|
|
|
|
|
|