Add search for products in all sub categories (#68)

src/datasources/product-api.ts

@@ -88,8 +88,8 @@ export class ProductAPI extends BaseSQLDataSource {
       return mem;
     }, {});
 
-    fields['artNo'] = fields['artNo'];
-    fields['name'] = fields['name'];
+    fields['artNo'] = fields['artNo'] ?? ''; // some actually exists without artNo
+    fields['name'] = fields['name'] ?? ''; // some actually exists without name
     fields['copyright'] = fields['copyright'] ?? '';
     fields['comments'] = fields['comments'] ?? '';
     fields['batch'] = fields['batch'] ?? '';
@@ -196,6 +196,16 @@ export class ProductAPI extends BaseSQLDataSource {
       .then((data) => data.rows.map((row) => this.createProductFromRow(row)));
   }
 
+  async getCategoryWithSubCategoriesProducts(
+    categoryId: number,
+  ): Promise<Array<Product>> {
+    const query = sql.categoryWithAllSubCategoriesProducts(categoryId);
+
+    return this.knex
+      .raw(query)
+      .then((data) => data.rows.map((row) => this.createProductFromRow(row)));
+  }
+
   async getKeywordProducts(keywordId: number): Promise<Array<Product>> {
     const query = sql.keywordProducts(keywordId);