README

Spatial data type support for hyperf/database

Transplanted from grimzy/laravel-mysql-spatial

Installation

Add the package using composer:

$ composer require nashgao/hyperf-mysql-spatial:~0.1

Then edit the model you just created. It must use the SpatialTrait and define an array called $spatialFields with the name of the MySQL Spatial Data field(s) created in the migration:

namespace App;

use Nashgao\HyperfMySQLSpatial\Eloquent\SpatialTrait;
use Hyperf\Database\Model\Model;
/**
 * @property \Nashgao\HyperfMySQLSpatial\Types\Point   $location
 * @property \Nashgao\HyperfMySQLSpatial\Types\Polygon $area
 */
class Place extends Model
{
    use SpatialTrait;

    protected $fillable = [
        'name'
    ];

    protected $spatialFields = [
        'location',
        'area'
    ];
}

Saving a model

use Nashgao\HyperfMySQLSpatial\Types\Point;
use Nashgao\HyperfMySQLSpatial\Types\Polygon;
use Nashgao\HyperfMySQLSpatial\Types\LineString;

$place1 = new Place();
$place1->name = 'Empire State Building';

// saving a point
$place1->location = new Point(40.7484404, -73.9878441);	// (lat, lng)
$place1->save();

// saving a polygon
$place1->area = new Polygon([new LineString([
    new Point(40.74894149554006, -73.98615270853043),
    new Point(40.74848633046773, -73.98648262023926),
    new Point(40.747925497790725, -73.9851602911949),
    new Point(40.74837050671544, -73.98482501506805),
    new Point(40.74894149554006, -73.98615270853043)
])]);
$place1->save();

Or if your database fields were created with a specific SRID:

use Nashgao\HyperfMySQLSpatial\Types\Point;
use Nashgao\HyperfMySQLSpatial\Types\Polygon;
use Nashgao\HyperfMySQLSpatial\Types\LineString;

$place1 = new Place();
$place1->name = 'Empire State Building';

// saving a point with SRID 4326 (WGS84 spheroid)
$place1->location = new Point(40.7484404, -73.9878441, 4326);	// (lat, lng, srid)
$place1->save();

// saving a polygon with SRID 4326 (WGS84 spheroid)
$place1->area = new Polygon([new LineString([
    new Point(40.74894149554006, -73.98615270853043),
    new Point(40.74848633046773, -73.98648262023926),
    new Point(40.747925497790725, -73.9851602911949),
    new Point(40.74837050671544, -73.98482501506805),
    new Point(40.74894149554006, -73.98615270853043)
])], 4326);
$place1->save();

Note: When saving collection Geometries (LineString, Polygon, MultiPoint, MultiLineString, and GeometryCollection), only the top-most geometry should have an SRID set in the constructor.

In the example above, when creating a new Polygon(), we only set the SRID on the Polygon and use the default for the LineString and the Point objects.

Retrieving a model

$place2 = Place::first();
$lat = $place2->location->getLat();	// 40.7484404
$lng = $place2->location->getLng();	// -73.9878441

Geometry classes

Available Geometry classes

Nashgao\HyperfMySQLSpatial\Types	OpenGIS Class
`Point($lat, $lng, $srid = 0)`	Point
`MultiPoint(Point[], $srid = 0)`	MultiPoint
`LineString(Point[], $srid = 0)`	LineString
`MultiLineString(LineString[], $srid = 0)`	MultiLineString
`Polygon(LineString[], $srid = 0)` (exterior and interior boundaries)	Polygon
`MultiPolygon(Polygon[], $srid = 0)`	MultiPolygon
`GeometryCollection(Geometry[], $srid = 0)`	GeometryCollection

Check out the Class diagram.

Using Geometry classes

In order for your Eloquent Model to handle the Geometry classes, it must use the Nashgao\HyperfMySQLSpatial\Eloquent\SpatialTrait trait and define a protected property $spatialFields as an array of MySQL Spatial Data Type column names (example in Quickstart).

IteratorAggregate and ArrayAccess

The collection Geometries (LineString, Polygon, MultiPoint, MultiLineString, and GeometryCollection) implement IteratorAggregate and ArrayAccess; making it easy to perform Iterator and Array operations. For example:

$polygon = $multipolygon[10];	// ArrayAccess

// IteratorAggregate
for($polygon as $i => $linestring) {
  echo (string) $linestring;
}

Helpers

From/To Well Known Text (WKT)

// fromWKT($wkt, $srid = 0)
$point = Point::fromWKT('POINT(2 1)');
$point->toWKT();	// POINT(2 1)

$polygon = Polygon::fromWKT('POLYGON((0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1))');
$polygon->toWKT();	// POLYGON((0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1))

From/To String

// fromString($wkt, $srid = 0)
$point = new Point(1, 2);	// lat, lng
(string)$point			// lng, lat: 2 1

$polygon = Polygon::fromString('(0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1)');
(string)$polygon;	// (0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1)

From/To JSON (GeoJSON)

The Geometry classes implement JsonSerializable and Illuminate\Contracts\Support\Jsonable to help serialize into GeoJSON:

$point = new Point(40.7484404, -73.9878441);

json_encode($point); // or $point->toJson();

// {
//   "type": "Feature",
//   "properties": {},
//   "geometry": {
//     "type": "Point",
//     "coordinates": [
//       -73.9878441,
//       40.7484404
//     ]
//   }
// }

To deserialize a GeoJSON string into a Geometry class, you can use Geometry::fromJson($json_string) :

$location = Geometry::fromJson('{"type":"Point","coordinates":[3.4,1.2]}');
$location instanceof Point::class;  // true
$location->getLat();  // 1.2
$location->getLng(); // 3.4

Scopes: Spatial analysis functions

Spatial analysis functions are implemented using Eloquent Local Scopes.

Available scopes:

distance($geometryColumn, $geometry, $distance)
distanceExcludingSelf($geometryColumn, $geometry, $distance)
distanceSphere($geometryColumn, $geometry, $distance)
distanceSphereExcludingSelf($geometryColumn, $geometry, $distance)
comparison($geometryColumn, $geometry, $relationship)
within($geometryColumn, $polygon)
crosses($geometryColumn, $geometry)
contains($geometryColumn, $geometry)
disjoint($geometryColumn, $geometry)
equals($geometryColumn, $geometry)
intersects($geometryColumn, $geometry)
overlaps($geometryColumn, $geometry)
doesTouch($geometryColumn, $geometry)
orderBySpatial($geometryColumn, $geometry, $orderFunction, $direction = 'asc')
orderByDistance($geometryColumn, $geometry, $direction = 'asc')
orderByDistanceSphere($geometryColumn, $geometry, $direction = 'asc')

Note that behavior and availability of MySQL spatial analysis functions differs in each MySQL version (cf. documentation).

Contributing

Recommendations and pull request are most welcome! Pull requests with tests are the best! There are still a lot of MySQL spatial functions to implement or creative ways to use spatial functions.

Credits

Originally inspired from njbarrett's Laravel postgis package.