Add lengths to all Unicode() ones

- Otherwise does not work with MySQL
- Change JSONDict to be TEXT (Unbounded) rather than VARCHAR.
  This makes most sense, since you can't index these anyway.
- The 'ip' field in Server is set to 255, since that is the
  max allowed length of DNS entries.
- Most of the rest of the Unicodes have approximately high
  values that most people should not mostly run into
  (famous last words).

jupyterhub/orm.py

@@ -12,7 +12,7 @@ from tornado import gen
 from tornado.log import app_log
 from tornado.httpclient import HTTPRequest, AsyncHTTPClient
 
-from sqlalchemy.types import TypeDecorator, VARCHAR
+from sqlalchemy.types import TypeDecorator, TEXT
 from sqlalchemy import (
     inspect,
     Column, Integer, ForeignKey, Unicode, Boolean,
@@ -39,7 +39,7 @@ class JSONDict(TypeDecorator):
 
     """
 
-    impl = VARCHAR
+    impl = TEXT
 
     def process_bind_param(self, value, dialect):
         if value is not None:
@@ -64,11 +64,11 @@ class Server(Base):
     """
     __tablename__ = 'servers'
     id = Column(Integer, primary_key=True)
-    proto = Column(Unicode, default='http')
+    proto = Column(Unicode(15), default='http')
-    ip = Column(Unicode, default='')
+    ip = Column(Unicode(255), default='')  # could also be a DNS name
     port = Column(Integer, default=random_port)
-    base_url = Column(Unicode, default='/')
+    base_url = Column(Unicode(255), default='/')
-    cookie_name = Column(Unicode, default='cookie')
+    cookie_name = Column(Unicode(255), default='cookie')
 
     def __repr__(self):
         return "<Server(%s:%s)>" % (self.ip, self.port)
@@ -178,6 +178,7 @@ class Proxy(Base):
         self.log.info("Adding user %s to proxy %s => %s",
             user.name, user.proxy_path, user.server.host,
         )
+
         if user.spawn_pending:
             raise RuntimeError(
                 "User %s's spawn is pending, shouldn't be added to the proxy yet!", user.name)
@@ -295,7 +296,7 @@ class User(Base):
     """
     __tablename__ = 'users'
     id = Column(Integer, primary_key=True, autoincrement=True)
-    name = Column(Unicode)
+    name = Column(Unicode(1023))
     # should we allow multiple servers per user?
     _server_id = Column(Integer, ForeignKey('servers.id'))
     server = relationship(Server, primaryjoin=_server_id == Server.id)
@@ -303,7 +304,7 @@ class User(Base):
     last_activity = Column(DateTime, default=datetime.utcnow)
 
     api_tokens = relationship("APIToken", backref="user")
-    cookie_id = Column(Unicode, default=new_token)
+    cookie_id = Column(Unicode(1023), default=new_token)
     state = Column(JSONDict)
 
     other_user_cookies = set([])
@@ -350,8 +351,8 @@ class APIToken(Base):
         return Column(Integer, ForeignKey('users.id'))
 
     id = Column(Integer, primary_key=True)
-    hashed = Column(Unicode)
+    hashed = Column(Unicode(1023))
-    prefix = Column(Unicode)
+    prefix = Column(Unicode(1023))
     prefix_length = 4
     algorithm = "sha512"
     rounds = 16384