From bdb5140b476c25814c06326c6a6e2fc8bc7fe25f Mon Sep 17 00:00:00 2001
From: Alicia <alicia.arenzana@gmail.com>
Date: Wed, 20 Sep 2023 13:16:39 +0200
Subject: [PATCH] added coalesce to avoid issue when property does not exist

---
 api/apps/geoprocessing/src/modules/features/features.service.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/api/apps/geoprocessing/src/modules/features/features.service.ts b/api/apps/geoprocessing/src/modules/features/features.service.ts
index f0758f4942..701e878ff3 100644
--- a/api/apps/geoprocessing/src/modules/features/features.service.ts
+++ b/api/apps/geoprocessing/src/modules/features/features.service.ts
@@ -74,7 +74,7 @@ export class FeatureService {
     const { z, x, y, id } = tileSpecification;
     const simplificationLevel = 360/(Math.pow(2, z+1)*100);
     const attributes = 'feature_id, properties';
-    const table = `(select ST_RemoveRepeatedPoints((st_dump(the_geom)).geom, ${simplificationLevel}) as the_geom, (properties || jsonb_build_object('amount', amount)) as properties, feature_id from "${this.featuresRepository.metadata.tableName}")`;
+    const table = `(select ST_RemoveRepeatedPoints((st_dump(the_geom)).geom, ${simplificationLevel}) as the_geom, (coalesce(properties,'{}'::jsonb) || jsonb_build_object('amount', amount)) as properties, feature_id from "${this.featuresRepository.metadata.tableName}")`;
     const customQuery = this.buildFeaturesWhereQuery(id, bbox);
     return this.tileService.getTile({
       z,