[plotter] Add missing class variables

beat/core/plotter.py

@@ -69,6 +69,9 @@ class Storage(utils.CodeStorage):
 
     """
 
+    asset_type = "plotter"
+    asset_folder = "plotters"
+
     def __init__(self, prefix, name, language=None):
 
         if name.count("/") != 2:
@@ -78,7 +81,9 @@ class Storage(utils.CodeStorage):
         self.fullname = name
         self.prefix = prefix
 
-        path = utils.hashed_or_simple(self.prefix, "plotters", name, suffix=".json")
+        path = utils.hashed_or_simple(
+            self.prefix, self.asset_folder, name, suffix=".json"
+        )
         path = path[:-5]
 
         super(Storage, self).__init__(path, language)