Merge pull request grimzy#128 from grimzy/issue-58-fix-retrieving-empty-geometry-collection

Fix issue where the WKB of empty GeometryCollections was not getting parsed

Author: grimzy

src/Eloquent/SpatialTrait.php

@@ -104,7 +104,7 @@ public function setRawAttributes(array $attributes, $sync = false)
         $spatial_fields = $this->getSpatialFields();
 
         foreach ($attributes as $attribute => &$value) {
-            if (in_array($attribute, $spatial_fields) && is_string($value) && strlen($value) >= 15) {
+            if (in_array($attribute, $spatial_fields) && is_string($value) && strlen($value) >= 13) {
                 $value = Geometry::fromWKB($value);
             }
         }

tests/Integration/Models/GeometryModel.php

@@ -9,5 +9,5 @@ class GeometryModel extends Model
 
     protected $table = 'geometry';
 
-    protected $spatialFields = ['location', 'line'];
+    protected $spatialFields = ['location', 'line', 'multi_geometries'];
 }

tests/Integration/SpatialTest.php

@@ -251,6 +251,10 @@ public function testInsertEmptyGeometryCollection()
         $geo->multi_geometries = new GeometryCollection([]);
         $geo->save();
         $this->assertDatabaseHas('geometry', ['id' => $geo->id]);
+
+        $geo2 = GeometryModel::find($geo->id);
+        $this->assertInstanceOf(GeometryCollection::class, $geo2->multi_geometries);
+        $this->assertEquals(0, count($geo2->multi_geometries));
     }
 
     public function testUpdate()