rvkulikov / yii2-postgis

Yii2 Postgis Extension

Yii2 Postgis

Extension for working with Postgis. As intermediate format used Geo Json.

Installing

The preferred way to install this extension is through Composer.

{
  "require": {
    "nanson/yii2-postgis": "*"
  }
}

GeometryBehavior

Converts coordinates array to SQL expression for saving in postgis binary format before insert/update and from postgis binary to array after find.

<?php

use yii\db\ActiveRecord;
use nanson\postgis\behaviors\GeometryBehavior;

class MyModel extends ActiveRecord
{

    // ...
    
    public function behaviors()
    {
        return [
            [
                'class' => GeometryBehavior::className(),
                'type' => GeometryBehavior::GEOMETRY_POINT,
                'attribute' => 'point',
                // explicitly set custom db connection if you do not want to use
                // static::getDb() or Yii::$app->getDb() connections
                'db' => 'db_custom'
            ],
            [
                'class' => GeometryBehavior::className(),
                'type' => GeometryBehavior::GEOMETRY_LINESTRING,
                'attribute' => 'line',
                // skip attribute if it was not selected as Geo Json (by PostgisQueryTrait), because it requires a separate query.
                'skipAfterFindPostgis' => true,
            ],
        ];
    }

    // ...

}

// ...

$model = new MyModel;

$model->point = [39.234, 54.456];
$model->line = [[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]];

$model->save();

?>

Option	Type	Default	Description
attribute	string		attribute that will be automatically handled
type	string		geometry type: Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon
skipAfterFindPostgis	boolean	false	skip convertion after find, if data in postgis binary (it requires a separate query, look PostgisQueryTrait)

StBufferBehavior

Generate SQL expression before insert/update based on geometry and radius

<?php

use yii\db\ActiveRecord;
use nanson\postgis\behaviors\GeometryBehavior;
use nanson\postgis\behaviors\StBufferBehavior;

class MyModel extends ActiveRecord
{

    // ...
    
    public function behaviors()
    {
        return [
            [
                'class' => GeometryBehavior::className(),
                'attribute' => 'point',
                'type' => GeometryBehavior::GEOMETRY_POINT,
            ],
            [
                'class' => StBufferBehavior::className(),
                'attribute' => 'buffer',
                'attributeGeometry' => 'point',
                'attributeRadius' => 'radius',
            ],
        ];
    }

    // ...

}

// ...

$model = new MyModel;

$model->point = [39.234, 54.456];
$model->radius = 5;

// It will be save St_Buffer for `$model->point` with `$model->radius` in `$model->buffer`
$model->save();

?>

Option	Type	Default	Description
attribute	string		attribute for saving buffer
attributeGeometry	string		attribute with geometry
attributeRadius	string		attribute with radius
geography	boolean	false	build buffer as geography
radiusUnit	string	deg for geomtery or m for geography	units of buffer radius: deg, m, km
options	array	[]	additional options for St_Buffer function

PostgisQueryTrait

Extends ActiveQuery for working with Postgis data.

<?php

class MyQuery extends \yii\db\ActiveQuery
{
    use \nanson\postgis\db\PostgisQueryTrait;
    
    // ...
}

// ...

class MyModel extends \yii\db\ActiveRecord
{
    public static function find(){
        return \Yii::createObject([
            'class' => MyQuery::className(),
        ], [get_called_class()]);
    }
}
?>

Option	Type	Default	Description
autoGeoJson	boolean	true	select all geo columns as GeoJson automatically
geoFields	array	all table columns with data type geometry or geography	table columns, that must be selected as Geo Json
exceptGeoFields	boolean	false	exclude all geo columns from select statement
exceptFields	array	[]	columns, which must be excluded from select statement

Method	Description
withGeoFields($fields=null)	Add columns, that must be selected as Geo Json. Accepts null, string, array. If fields is null - all geoFileds will be added.
excludeFields($fields=null)	Exclude columns from select statement. Accepts null, string, array. If fields is null - all exceptFields will be excluded from select statement.

GeoJsonHelper

Helper for working with Geo Json

Method	Returns	Description
toArray($geoJson)	array	returns coordinates array by Geo Json
toGeoJson($type, $coordinates, $srid=4326)	string (geo json)	returns Geo Json by geometry type, coordinates array and SRID
toGeometry($type, $coordinates, $srid=4326)	string (sql expression)	the same, that toGeoJson, but wraps result by "ST_GeomFromGeoJSON('$geoJson')"