first implementation of fields

api/sample.yaml

@@ -42,9 +42,15 @@
         schema:
           type: boolean
         example: false
+      - name: fields
+        description: the fields to include in the output as array, defaults to ['_id','number','type','batch','material_id','color','condition','note_id','user_id','added']
+        in: query
+        schema:
+         type: string
+        example: '&fields[]=number&fields[]=batch'
     responses:
       200:
-        description: samples overview
+        description: samples overview (if the csv parameter is set, this is in CSV instead of JSON format)
         content:
           application/json:
             schema: