[IMP]connection_elasticsearch: show 'Already cleared' message

connector_elasticsearch/components/adapter.py

@@ -95,6 +95,16 @@ def clear(self):
         res = es.indices.delete(index=self._index_name, ignore=[400, 404])
         # recreate the index
         self._get_es_client()
+        if "error" in res.keys() and res["error"].get("index_uuid") == "_na_":
+            return {
+                "type": "ir.actions.client",
+                "tag": "display_notification",
+                "params": {
+                    "title": _("Already cleared!"),
+                    "message": _("There was nothing to clear!"),
+                    "sticky": False,
+                },
+            }
         return res["acknowledged"]
 
     def each(self):

connector_elasticsearch/tests/cassettes/TestConnectorElasticsearch.test_index_adapter_delete.yaml

@@ -98,6 +98,30 @@ interactions:
     status:
       code: 200
       message: OK
+- request:
+    body: null
+    headers:
+      Content-Length:
+      - '0'
+      content-type:
+      - application/json
+      user-agent:
+      - elasticsearch-py/7.14.0a1 (Python 3.7.3)
+      x-elastic-client-meta:
+      - es=7.14.0p,py=3.7.3,t=7.14.0p,rq=2.21.0
+    method: DELETE
+    uri: http://elastic:9200/demo_elasticsearch_backend_res_partner_binding_fake_en_us
+  response:
+    body:
+      string: '{"acknowledged":true}'
+    headers:
+      content-length:
+      - '21'
+      content-type:
+      - application/json; charset=UTF-8
+    status:
+      code: 200
+      message: OK
 - request:
     body: null
     headers: