Flesh out some of the organization methods and fix the models.

data/database.py

@@ -38,9 +38,16 @@ class User(BaseModel):
 
 
 class Team(BaseModel):
-  name = CharField()
+  name = CharField(index=True)
   organization = ForeignKeyField(User, index=True)
 
+  class Meta:
+    database = db
+    indexes = (
+      # A team name must be unique within an organization
+      (('name', 'organization'), True),
+    )
+
 
 class TeamMember(BaseModel):
   user = ForeignKeyField(User, index=True)
@@ -97,13 +104,15 @@ class Role(BaseModel):
 
 
 class RepositoryPermission(BaseModel):
-  user = ForeignKeyField(User, index=True)
+  team = ForeignKeyField(Team, index=True, null=True)
+  user = ForeignKeyField(User, index=True, null=True)
   repository = ForeignKeyField(Repository, index=True)
   role = ForeignKeyField(Role)
 
   class Meta:
     database = db
     indexes = (
+      (('team', 'repository'), True),
       (('user', 'repository'), True),
     )
 
@@ -116,7 +125,6 @@ class TeamPermission(BaseModel):
   class Meta:
     database = db
     indexes = (
-      # A team may only have one permission level in an org
       (('team', 'organization'), True),
     )