program: fix tag assignment

app/models/post.py

@@ -21,6 +21,9 @@ class Post(db.Model):
         index=True)
     author = db.relationship('User', backref="posts", foreign_keys=author_id)
 
+    # Tags, for programs and tutorials
+    tags = db.relationship('Tag', back_populates='post', lazy='joined')
+
     __mapper_args__ = {
         'polymorphic_identity': __tablename__,
         'polymorphic_on': type

app/models/program.py

@@ -12,15 +12,12 @@ class Program(Post):
     title = db.Column(db.Unicode(128))
 
     # TODO: Category (games/utilities/lessons)
-    # TODO: Tags
     # TODO: Compatible calculator models
 
     thread_id = db.Column(db.Integer,db.ForeignKey('thread.id'),nullable=False)
     thread = db.relationship('Thread', foreign_keys=thread_id,
         back_populates='owner_program')
 
-    tags = db.relationship('Tag', back_populates='post', lazy='joined')
-
     # TODO: Number of views, statistics, attached files, etc
 
     def __init__(self, author, title, thread):