[experiments][models] Refactor declaration handling

Make it properties like for other models

beat/web/experiments/models/experiment.py

@@ -48,6 +48,9 @@ from ...common.models import get_contribution_declaration_filename
 from ...common.models import get_contribution_description_filename
 from ...common.models import get_description
 from ...common.models import set_description
+from ...common.models import get_declaration
+from ...common.models import set_declaration
+from ...common.models import get_declaration_string
 from ...common import storage
 
 from ...common.exceptions import ShareError
@@ -749,23 +752,9 @@ class Experiment(Shareable):
 
     #_____ Properties __________
 
-    def set_declaration(self, value):
-        if isinstance(value, dict):
-            value = simplejson.dumps(value, indent=4, cls=NumpyJSONEncoder)
-
-        storage.set_file_content(self, 'declaration_file', self.declaration_filename(), value)
-
-    def get_declaration(self):
-        return simplejson.loads(storage.get_file_content(self, 'declaration_file'))
-
-    declaration = property(get_declaration, set_declaration)
-
     description = property(get_description, set_description)
-
-
-    @property
-    def declaration_string(self):
-        return storage.get_file_content(self, 'declaration_file')
+    declaration = property(get_declaration, set_declaration)
+    declaration_string = property(beat.web.common.models.get_declaration_string)
 
 
     def schedule(self):
@@ -788,6 +777,6 @@ class Experiment(Shareable):
         author = username or self.author
         name = name or self.name
         xp, _, __ = Experiment.objects.create_experiment(author,
-                                                         self.toolchain, name, self.get_declaration(),
+                                                         self.toolchain, name, self.declaration,
                                                          self.short_description, self.description)
         return xp