use dhid for get the devicehub_id of the real parth of a device

ereuse_devicehub/api/views.py

@@ -75,7 +75,7 @@ class InventoryView(LoginMixin, SnapshotMixin):
         self.response = jsonify(
             {
                 'url': snapshot.device.url.to_text(),
-                'dhid': snapshot.device.devicehub_id,
+                'dhid': snapshot.device.dhid,
                 'sid': snapshot.sid,
             }
         )

ereuse_devicehub/resources/device/models.py

@@ -324,16 +324,13 @@ class Device(Thing):
 
     @property
     def public_link(self) -> str:
-        if self.binding:
-            return self.binding.device.public_link
-
         host_url = request.host_url.strip('/')
         return "{}{}".format(host_url, self.url.to_text())
 
     @property
     def url(self) -> urlutils.URL:
         """The URL where to GET this device."""
-        return urlutils.URL(url_for_resource(Device, item_id=self.devicehub_id))
+        return urlutils.URL(url_for_resource(Device, item_id=self.dhid))
 
     @property
     def rate(self):
@@ -618,6 +615,14 @@ class Device(Thing):
         model = self.model or ''
         return f'{type} {manufacturer} {model}'
 
+    @property
+    def dhid(self):
+        if self.placeholder:
+            return self.placeholder.device.devicehub_id
+        if self.binding:
+            return self.binding.device.devicehub_id
+        return self.devicehub_id
+
     @declared_attr
     def __mapper_args__(cls):
         """Defines inheritance.

ereuse_devicehub/resources/device/schemas.py

@@ -114,7 +114,7 @@ class Device(Thing):
     sku = SanitizedStr(description=m.Device.sku.comment)
     image = URL(description=m.Device.image.comment)
     allocated = Boolean(description=m.Device.allocated.comment)
-    devicehub_id = SanitizedStr(
+    dhid = SanitizedStr(
         data_key='devicehubID', description=m.Device.devicehub_id.comment
     )