change validateurs, reviewsers and authors to one field (actors)

evolus/models.py

@@ -141,6 +141,26 @@ class Document(models.Model):
         return self.title
 
 
+ROLE_CHOICES = (
+    (1, 'Validator'),
+    (2, 'Reviewer'),
+    (3, 'Author'),
+)
+
+
+class Role(models.Model):
+    """Defines possible roles for users.
+
+    These roles will (or can) be used for running processes.
+
+    :attributes
+        name (str): the name of the role.
+    """
+    type = models.IntegerField(choices=ROLE_CHOICES)
+    actor = models.ForeignKey(User)
+    Version = models.ForeignKey('Version')
+
+
 @reversion.register()
 class Version(models.Model):
     """A version represents the writing steps of a document.
@@ -159,9 +179,7 @@ class Version(models.Model):
         restricted
 
     Actors:
-        Validators
-        Writers
-        Reviewers
+        actors
     """
     # instance structure
     document = models.ForeignKey(Document, related_name='versions')
@@ -181,16 +199,14 @@ class Version(models.Model):
     nodes = models.ManyToManyField(Node, blank=True)
 
     # actors
-    authors = models.ManyToManyField(User, related_name='versions_as_author')
-    reviewers = models.ManyToManyField(User, related_name='versions_as_reviewer')
-    validators = models.ManyToManyField(User, related_name='versions_as_validator')
+    actors = models.ManyToManyField(User, related_name='versions', through='Role')
 
     @reversion.create_revision()
     def publish(self):
-        """Starts a new publication process, based on the people set as `validators`.
+        """Starts a new publication process, based on the people set with a role `validator`.
 
         If the current version has not been published yet, this method checks that
-        there are people in the `validators` fields and assign a task to each one of them.
+        there are people in the role `validator`  and assign a task to each one of them.
 
         :exception
             ActorException: when no validator has been set.