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Dimensions

A summary table can have one or more dimensions. Dimensions are properties of the source entity that are used to group the data. They have distinct, descriptive values.

Dimension Definition​

In a summary table, a dimension is marked by the #[Analytics\Dimension] attribute.

use Doctrine\DBAL\Types\Types;
use Doctrine\ORM\Mapping as ORM;
use Rekalogika\Analytics\Core\Metadata as Analytics;
use Rekalogika\Analytics\Core\ValueResolver\PropertyValue;
use Symfony\Component\Translation\TranslatableMessage;

class YourSummary extends Summary
{
    #[ORM\Column(type: Types::STRING)]
    #[Analytics\Dimension(
        source: new PropertyValue('status'),
        label: new TranslatableMessage('Status'),
    )]
    private ?string $status = null;
}

Arguments:

  • source: A ValueResolver or a string that defines how to get the value from the source entity. A string will be converted to a PropertyValue internally.
  • label: A label for the dimension. An output renderer will be able to use it as a column header or a chart legend. It can be a string or a TranslatableInterface instance, which allows it to be translated into different languages.
  • orderBy: Can be Order::Ascending or Order::Descending. This defines how the dimension values are ordered in the summary table. If not specified, the default order is ascending.
  • nullLabel: Describes the dimension value when the source value is null, so the final output can be made more readable.

Hierarchical Dimensions​

A dimension can be hierarchical. A common example is the time dimension. The time dimension can be further divided into year, month, day, and more. The caller will then be able to decide whether to group the time by year, month, or day, etc.

A hierarchical dimension is represented by a Doctrine embeddable. The following example uses a TimeDimensionHierarchy.

use Doctrine\ORM\Mapping as ORM;
use Rekalogika\Analytics\Core\Metadata as Analytics;
use Rekalogika\Analytics\Time\Hierarchy\TimeDimensionHierarchy;
use Rekalogika\Analytics\Core\ValueResolver\PropertyValue;

class YourSummary extends Summary
{
    #[ORM\Embedded()]
    #[Analytics\Dimension(
        source: new PropertyValue('time'),
    )]
    private TimeDimensionHierarchy $time;
}

The framework provides these predefined time hierarchies:

  • TimeDimensionHierarchy
  • DateDimensionHierarchy
  • SimpleTimeDimensionHierarchy
  • SimpleDateDimensionHierarchy