fix errors, remove pep8 corrections

jupyterhub/app.py

@@ -1095,7 +1095,9 @@ class JupyterHub(Application):
                 # if user.server is defined.
                 log = self.log.warning if user.server else self.log.debug
                 log("%s not running.", user.name)
-                user.server = None
+                for server in user.servers:
+                    db.delete(server)
+                db.commit()
 
             user_summaries.append(_user_summary(user))
 

jupyterhub/orm.py

@@ -19,7 +19,7 @@ from sqlalchemy import (
 from sqlalchemy.ext.declarative import declarative_base, declared_attr
 from sqlalchemy.orm import sessionmaker, relationship, backref
 from sqlalchemy.pool import StaticPool
-from sqlalchemy.schema import Index
+from sqlalchemy.schema import Index, UniqueConstraint
 from sqlalchemy.ext.associationproxy import association_proxy
 from sqlalchemy.sql.expression import bindparam
 from sqlalchemy import create_engine, Table
@@ -32,11 +32,8 @@ from .utils import (
 
 class JSONDict(TypeDecorator):
     """Represents an immutable structure as a json-encoded string.
-
     Usage::
-
         JSONEncodedDict(255)
-
     """
 
     impl = TEXT
@@ -59,7 +56,6 @@ Base.log = app_log
 
 class Server(Base):
     """The basic state of a server
-
     connection and cookie info
     """
     __tablename__ = 'servers'
@@ -69,6 +65,7 @@ class Server(Base):
     port = Column(Integer, default=random_port)
     base_url = Column(Unicode(255), default='/')
     cookie_name = Column(Unicode(255), default='cookie')
+
     # added to handle multi-server feature
     last_activity = Column(DateTime, default=datetime.utcnow)
 
@@ -101,10 +98,8 @@ class Server(Base):
     @property
     def bind_url(self):
         """representation of URL used for binding
-
         Never used in APIs, only logging,
-        since it can be non-connectable value, such as '',
+        since it can be non-connectable value, such as '', meaning all interfaces.
-        meaning all interfaces.
         """
         if self.ip in {'', '0.0.0.0'}:
             return self.url.replace('127.0.0.1', self.ip or '*', 1)
@@ -116,8 +111,7 @@ class Server(Base):
         if http:
             yield wait_for_http_server(self.url, timeout=timeout)
         else:
-            yield wait_for_server(self.ip or '127.0.0.1', self.port,
+            yield wait_for_server(self.ip or '127.0.0.1', self.port, timeout=timeout)
-                                  timeout=timeout)
 
     def is_up(self):
         """Is the server accepting connections?"""
@@ -126,7 +120,6 @@ class Server(Base):
 
 class Proxy(Base):
     """A configurable-http-proxy instance.
-
     A proxy consists of the API server info and the public-facing server info,
     plus an auth token for configuring the proxy table.
     """
@@ -191,9 +184,9 @@ class Proxy(Base):
             client=client,
         )
 
-    @gen.coroutine
     # FIX-ME
     # we need to add a reference to a specific server
+    @gen.coroutine
     def add_user(self, user, client=None):
         """Add a user's server to the proxy table."""
         self.log.info("Adding user %s to proxy %s => %s",
@@ -225,7 +218,6 @@ class Proxy(Base):
     @gen.coroutine
     def add_all_services(self, service_dict):
         """Update the proxy table from the database.
-
         Used when loading up a new proxy.
         """
         db = inspect(self).session
@@ -241,7 +233,6 @@ class Proxy(Base):
     @gen.coroutine
     def add_all_users(self, user_dict):
         """Update the proxy table from the database.
-
         Used when loading up a new proxy.
         """
         db = inspect(self).session
@@ -299,11 +290,10 @@ class Proxy(Base):
             yield f
 
 
+
 class Hub(Base):
     """Bring it all together at the hub.
-
     The Hub is a server, plus its API path suffix
-
     the api_url is the full URL plus the api_path suffix on the end
     of the server base_url.
     """
@@ -331,8 +321,7 @@ class Hub(Base):
 user_group_map = Table('user_group_map', Base.metadata,
     Column('user_id', ForeignKey('users.id'), primary_key=True),
     Column('group_id', ForeignKey('groups.id'), primary_key=True),
-                       )
+)
-
 
 class Group(Base):
     """User Groups"""
@@ -345,47 +334,41 @@ class Group(Base):
         return "<%s %s (%i users)>" % (
             self.__class__.__name__, self.name, len(self.users)
         )
-
     @classmethod
     def find(cls, db, name):
         """Find a group by name.
-
         Returns None if not found.
         """
-        return db.query(cls).filter(cls.name == name).first()
+        return db.query(cls).filter(cls.name==name).first()
 
 
 class User(Base):
     """The User table
-
+    Each user can have more than a single server,
-    Each user can have more than one server,
     and multiple tokens used for authorization.
-
     API tokens grant access to the Hub's REST API.
     These are used by single-user servers to authenticate requests,
     and external services to manipulate the Hub.
-
     Cookies are set with a single ID.
     Resetting the Cookie ID invalidates all cookies, forcing user to login again.
-
-    `server` returns the first entry for the users' servers.
-
     A `state` column contains a JSON dict,
     used for restoring state of a Spawner.
+    `server` returns the first entry for the users' servers.
+    'servers' is a list that contains a reference to the ser's Servers.
     """
     __tablename__ = 'users'
     id = Column(Integer, primary_key=True, autoincrement=True)
     name = Column(Unicode(1023), unique=True)
-    admin = Column(Boolean, default=False)
-    last_activity = Column(DateTime, default=datetime.utcnow)
 
     servers = association_proxy("user_to_servers", "server", creator=lambda server: UserServer(server=server))
 
+    admin = Column(Boolean, default=False)
+    last_activity = Column(DateTime, default=datetime.utcnow)
+
     api_tokens = relationship("APIToken", backref="user")
     cookie_id = Column(Unicode(1023), default=new_token)
     # User.state is actually Spawner state
-    # We will need to figure something else
+    # We will need to figure something else out if/when we have multiple spawners per user
-    # out if/when we have multiple spawners per user
     state = Column(JSONDict)
     # Authenticators can store their state here:
     auth_state = Column(JSONDict)
@@ -397,7 +380,6 @@ class User(Base):
     @property
     def server(self):
         """Returns the first element of servers.
-
         Returns None if the list is empty.
         """
         if len(self.servers) == 0:
@@ -429,24 +411,19 @@ class User(Base):
     @classmethod
     def find(cls, db, name):
         """Find a user by name.
-
         Returns None if not found.
         """
-        return db.query(cls).filter(cls.name == name).first()
+        return db.query(cls).filter(cls.name==name).first()
 
 
 class UserServer(Base):
     """The UserServer table
-
     Each user can have have more than one server,
-    we use this table to mantain the Many-To-Many
+    we use this table to mantain the Many-To-One
-    relationship between Users and Servers.
+    relationship between Users and Servers tables.
 
-    Cookies are set with a single ID.
+    Servers can have only 1 user, this condition is mantained
-    Resetting the Cookie ID invalidates all cookies, forcing user to login again.
+    by UniqueConstraint
-
-    A `state` column contains a JSON dict,
-    used for restoring state of a Spawner.
     """
     __tablename__ = 'users_servers'
 
@@ -454,9 +431,12 @@ class UserServer(Base):
     _server_id = Column(Integer, ForeignKey('servers.id'), primary_key=True)
 
     user = relationship(User, backref=backref('user_to_servers', cascade='all, delete-orphan'))
-    server = relationship(Server, backref=backref('server_to_users', cascade='all, delete-orphan'))
+    server = relationship(Server, backref=backref('server_to_users', cascade='all, delete-orphan')
+                          )
 
-    __table_args__ = (Index('server_user_index', '_server_id', '_user_id'),)
+    __table_args__ = (
+            UniqueConstraint('_server_id'),
+            Index('server_user_index', '_server_id', '_user_id'),)
 
     def __repr__(self):
         return "<{cls}({name}@{ip}:{port})>".format(
@@ -469,21 +449,15 @@ class UserServer(Base):
 
 class Service(Base):
     """A service run with JupyterHub
-
     A service is similar to a User without a Spawner.
     A service can have API tokens for accessing the Hub's API
-
     It has:
-
     - name
     - admin
     - api tokens
     - server (if proxied http endpoint)
-
     In addition to what it has in common with users, a Service has extra info:
-
     - pid: the process id (if managed)
-
     """
     __tablename__ = 'services'
     id = Column(Integer, primary_key=True, autoincrement=True)
@@ -501,7 +475,6 @@ class Service(Base):
 
     def new_api_token(self, token=None):
         """Create a new API token
-
         If `token` is given, load that token.
         """
         return APIToken.new(token=token, service=self)
@@ -509,7 +482,6 @@ class Service(Base):
     @classmethod
     def find(cls, db, name):
         """Find a service by name.
-
         Returns None if not found.
         """
         return db.query(cls).filter(cls.name==name).first()
@@ -567,7 +539,6 @@ class APIToken(Base):
     @classmethod
     def find(cls, db, token, *, kind=None):
         """Find a token object by value.
-
         Returns None if not found.
 
         `kind='user'` only returns API tokens for users

jupyterhub/tests/conftest.py

@@ -30,8 +30,8 @@ def db():
         _db = orm.new_session_factory('sqlite:///:memory:', echo=True)()
         user = orm.User(
             name=getuser(),
-            server=orm.Server(),
         )
+        user.servers.append(orm.Server())
         hub = orm.Hub(
             server=orm.Server(),
         )

jupyterhub/user.py

@@ -198,12 +198,12 @@ class User(HasTraits):
     def spawn(self, options=None):
         """Start the user's spawner"""
         db = self.db
-        
+        server = orm.Server(
-        self.server = orm.Server(
             cookie_name=self.cookie_name,
             base_url=self.base_url,
         )
-        db.add(self.server)
+        self.servers.append(server)
+        db.add(self)
         db.commit()
 
         api_token = self.new_api_token()
@@ -316,7 +316,8 @@ class User(HasTraits):
             orm_token = orm.APIToken.find(self.db, api_token)
             if orm_token:
                 self.db.delete(orm_token)
-            self.server = None
+            for server in self.servers:
+                self.db.delete(server)
             self.db.commit()
         finally:
             self.stop_pending = False
@@ -326,4 +327,3 @@ class User(HasTraits):
                 yield gen.maybe_future(
                     auth.post_spawn_stop(self, spawner)
                 )
-