Pagination

Requesting a list of objects by /objects endpoint the result will be paginated using default values that you can customize in ApiController.

In the response you’ll see tha pagination data in paging key

{
    "api": "objects",
    "data": {},
    "method": "get",
    "paging": {
        "page": 1,
        "page_size": 10,
        "page_count": 10,
        "total": 995,
        "total_pages": 100
    },
    "params": [],
    "url": "https://example.com/api/v1/objects/1/children"
}

where

• page is the current page
• page_size is the items per page
• page_count is the count of items in current page
• total is the total items
• total_pages is the total numbers of pages

To request a specific page simply call the endpoint passing page as GET parameter for example /api/objects/1/children?page=5 to request the page 5.

You can also change the page size always through GET parameter, for example /api/objects/1/children?page_size=50 to request 50 objects per page. page_size can’t be greater of $paginationOptions['maxPageSize'] defined in controller.

See below to know how to change the default values.

Define your API pagination default options

The default values used paginating items are defined in ApiBaseController::paginationOptions property.

protected $paginationOptions = array(
    'page' => 1,
    'pageSize' => 20,
    'maxPageSize' => 100
);

where pageSize is the default items per page and maxPageSize is the max page dimension that client can request. Requests with page_size greater of maxPageSize returns a 400 HTTP error.

If you want modify those defaults you can simply override that property in ApiController.

Paginate objects in custom endpoints

When a request has page or page_size as GET parameters those are validated and $paginationOptions is updated to contain the requested page options. A dim key equal to pageSize is added to be ready to use in some methods as FrontendController::loadSectionObjects().

In this way in a ‘custom’ API endpoint you can simply do

protected function custom($id) {
    $result = $this->loadSectionObjects($id, $this->paginationOptions);
    // format and set pagination
    $this->setPaging($this->ApiFormatter->formatPaging($result['toolbar']));

    // do other stuff
}

and you are sure that pagination will work properly without doing anything else.