diff --git a/compass/api/api.py b/compass/api/api.py
index 33fbb340..f24f886e 100644
--- a/compass/api/api.py
+++ b/compass/api/api.py
@@ -189,16 +189,19 @@ def _wrap_response(func, response_code):
     return wrapped_func
 
 
+def _reformat_host_networks(networks):
+    network_mapping = {}
+    for network in networks:
+        if 'interface' in network:
+            network_mapping[network['interface']] = network
+    return network_mapping
+
+
 def _reformat_host(host):
     if isinstance(host, list):
         return [_reformat_host(item) for item in host]
     if 'networks' in host:
-        networks = host['networks']
-        network_mapping = {}
-        for network in networks:
-            if 'interface' in network:
-                network_mapping[network['interface']] = network
-        host['networks'] = network_mapping
+        host['networks'] = _reformat_host_networks(host['networks'])
     return host
 
 
@@ -355,21 +358,29 @@ def take_user_action(user_id):
         ),
         200
     )
+
+    def disable_user(disable_user=None):
+        return user_api.update_user(
+            current_user, user_id, active=False
+        )
+
     disable_user_func = _wrap_response(
-        functools.partial(
-            user_api.update_user, current_user, user_id, active=False
-        ),
+        disable_user,
         200
     )
+
+    def enable_user(enable_user=None):
+        return user_api.update_user(
+            current_user, user_id, active=True
+        )
+
     enable_user_func = _wrap_response(
-        functools.partial(
-            user_api.update_user, current_user, user_id, active=True
-        ),
+        enable_user,
         200
     )
     return _group_data_action(
         data,
-        add_permission=update_permissions_func,
+        add_permissions=update_permissions_func,
         remove_permissions=update_permissions_func,
         set_permissions=update_permissions_func,
         enable_user=enable_user_func,
@@ -399,7 +410,7 @@ def show_user_permission(user_id, permission_id):
 @log_user_action
 @login_required
 def add_user_permission(user_id):
-    """Delete a specific user permission."""
+    """Add permission to a specific user."""
     data = _get_request_data()
     return utils.make_json_response(
         200,
@@ -518,7 +529,6 @@ def list_user_actions(user_id):
 def delete_all_user_actions():
     """Delete all user actions."""
     data = _get_request_data()
-    _filter_timestamp(data)
     return utils.make_json_response(
         200,
         user_log_api.del_actions(
@@ -533,7 +543,6 @@ def delete_all_user_actions():
 def delete_user_actions(user_id):
     """Delete user actions."""
     data = _get_request_data()
-    _filter_timestamp(data)
     return utils.make_json_response(
         200,
         user_log_api.del_user_actions(
@@ -933,17 +942,20 @@ def take_machine_action(machine_id):
     poweron_func = _wrap_response(
         functools.partial(
             machine_api.poweron_machine, current_user, machine_id
-        )
+        ),
+        202
     )
     poweroff_func = _wrap_response(
         functools.partial(
             machine_api.poweroff_machine, current_user, machine_id
-        )
+        ),
+        202
     )
     reset_func = _wrap_response(
         functools.partial(
             machine_api.reset_machine, current_user, machine_id
-        )
+        ),
+        202
     )
     return _group_data_action(
         data,
@@ -1228,20 +1240,6 @@ def show_adapter(adapter_id):
     )
 
 
-@app.route("/adapters/<int:adapter_id>/roles", methods=['GET'])
-@log_user_action
-@login_required
-def show_adapter_roles(adapter_id):
-    """Get adapter roles."""
-    data = _get_request_args()
-    return utils.make_json_response(
-        200,
-        adapter_api.get_adapter_roles(
-            current_user, adapter_id, **data
-        )
-    )
-
-
 @app.route("/adapters/<int:adapter_id>/metadata", methods=['GET'])
 @log_user_action
 @login_required
@@ -2000,7 +1998,12 @@ def list_host_networks(host_id):
     """list host networks."""
     data = _get_request_args()
     return utils.make_json_response(
-        200, host_api.list_host_networks(current_user, host_id, **data)
+        200,
+        _reformat_host_networks(
+            host_api.list_host_networks(
+                current_user, host_id, **data
+            )
+        )
     )
 
 
@@ -2014,7 +2017,10 @@ def list_hostnetworks():
         is_promiscuous=_bool_converter
     )
     return utils.make_json_response(
-        200, host_api.list_hostnetworks(current_user, **data)
+        200,
+        _reformat_host_networks(
+            host_api.list_hostnetworks(current_user, **data)
+        )
     )
 
 
@@ -2311,6 +2317,31 @@ def proxy_put(url):
     )
 
 
+@app.route("/proxy/<path:url>", methods=['PATCH'])
+@log_user_action
+@login_required
+def proxy_patch(url):
+    """proxy url."""
+    headers = _get_headers(
+        'Content-Type', 'Accept-Encoding',
+        'Content-Encoding', 'Accept', 'User-Agent',
+        'Content-MD5', 'Transfer-Encoding',
+        'Cookie'
+    )
+    response = requests.patch(
+        '%s/%s' % (setting.PROXY_URL_PREFIX, url),
+        data=request.data,
+        headers=headers
+    )
+    logging.debug(
+        'proxy %s response: %s',
+        url, response.text
+    )
+    return utils.make_json_response(
+        response.status_code, _get_response_json(response)
+    )
+
+
 @app.route("/proxy/<path:url>", methods=['DELETE'])
 @log_user_action
 @login_required
diff --git a/compass/db/api/adapter_holder.py b/compass/db/api/adapter_holder.py
index 3cad3a79..185eeb74 100644
--- a/compass/db/api/adapter_holder.py
+++ b/compass/db/api/adapter_holder.py
@@ -128,15 +128,3 @@ def get_adapter_internal(session, adapter_id):
 def get_adapter(session, getter, adapter_id, **kwargs):
     """get adapter."""
     return get_adapter_internal(session, adapter_id)
-
-
-@utils.supported_filters([])
-@database.run_in_session()
-@user_api.check_user_permission_in_session(
-    permission.PERMISSION_LIST_ADAPTERS
-)
-@utils.wrap_to_dict(RESP_ROLES_FIELDS)
-def get_adapter_roles(session, getter, adapter_id, **kwargs):
-    """get adapter roles."""
-    adapter = get_adapter_internal(session, adapter_id)
-    return adapter.get('roles', [])
diff --git a/compass/db/api/cluster.py b/compass/db/api/cluster.py
index 2e0c54bb..75cb1a20 100644
--- a/compass/db/api/cluster.py
+++ b/compass/db/api/cluster.py
@@ -29,14 +29,15 @@ from compass.utils import util
 
 
 SUPPORTED_FIELDS = [
-    'name', 'os_name', 'distributed_system_name', 'owner', 'adapter_id'
+    'name', 'os_name', 'distributed_system_name', 'owner',
+    'adapter_name', 'flavor_name'
 ]
 SUPPORTED_CLUSTERHOST_FIELDS = []
 RESP_FIELDS = [
     'id', 'name', 'os_name', 'os_id', 'distributed_system_id',
     'reinstall_distributed_system', 'flavor',
     'distributed_system_name', 'distributed_system_installed',
-    'owner', 'adapter_id',
+    'owner', 'adapter_id', 'adapter_name', 'flavor_name',
     'created_at', 'updated_at'
 ]
 RESP_CLUSTERHOST_FIELDS = [
@@ -691,27 +692,25 @@ def _update_clusterhost(session, updater, clusterhost, **kwargs):
         cluster_roles = []
         cluster = clusterhost.cluster
         flavor = cluster.flavor
-        if not flavor:
-            raise exception.InvalidParameter(
-                'not flavor in cluster %s' % cluster.name
-            )
-        for flavor_roles in flavor.flavor_roles:
-            cluster_roles.append(flavor_roles.role.name)
-        for role in roles:
-            if role not in cluster_roles:
-                raise exception.InvalidParameter(
-                    'role %s is not in cluster roles %s' % (
-                        role, cluster_roles
-                    )
-                )
-    if 'roles' in kwargs:
-        roles = kwargs['roles']
-        flavor = clusterhost.cluster.flavor
         if not roles:
-            if flavor and flavor.flavor_roles:
+            if flavor:
                 raise exception.InvalidParameter(
                     'roles %s is empty' % roles
                 )
+        else:
+            if not flavor:
+                raise exception.InvalidParameter(
+                    'not flavor in cluster %s' % cluster.name
+                )
+            for flavor_roles in flavor.flavor_roles:
+                cluster_roles.append(flavor_roles.role.name)
+            for role in roles:
+                if role not in cluster_roles:
+                    raise exception.InvalidParameter(
+                        'role %s is not in cluster roles %s' % (
+                            role, cluster_roles
+                        )
+                    )
 
     @utils.input_validates(
         roles=roles_validates,
diff --git a/compass/db/api/switch.py b/compass/db/api/switch.py
index 9efe3fe7..7f6a9dbd 100644
--- a/compass/db/api/switch.py
+++ b/compass/db/api/switch.py
@@ -58,10 +58,6 @@ ADDED_MACHINES_FIELDS = ['mac', 'port']
 OPTIONAL_ADDED_MACHINES_FIELDS = [
     'vlans', 'ipmi_credentials', 'tag', 'location'
 ]
-OPTIONAL_CHECK_FILTER_FIELDS = [
-    'filter_type', 'ports', 'port_prefix', 'port_suffix',
-    'port_start', 'port_end'
-]
 ADDED_SWITCH_MACHINES_FIELDS = ['port', 'vlans']
 UPDATED_MACHINES_FIELDS = [
     'port', 'vlans', 'ipmi_credentials',
@@ -104,18 +100,7 @@ RESP_CLUSTER_FIELDS = [
 
 def _check_filters(switch_filters):
     logging.debug('check filters: %s', switch_filters)
-    switch_filters = models.Switch.parse_filters(switch_filters)
-    for switch_filter in switch_filters:
-        _check_filter_internal(**switch_filter)
-
-
-@utils.supported_filters(
-    optional_support_keys=OPTIONAL_CHECK_FILTER_FIELDS
-)
-def _check_filter_internal(
-    **switch_filter
-):
-    pass
+    models.Switch.parse_filters(switch_filters)
 
 
 def _check_vlans(vlans):
@@ -791,7 +776,7 @@ def _update_machine_internal(session, switch_id, machine_id, **kwargs):
 
 
 def _add_machines(session, switch, machines):
-    for machine in machines.items():
+    for machine in machines:
         _update_machine_internal(
             session, switch.id, **machine
         )
@@ -809,7 +794,7 @@ def _set_machines(session, switch, machines):
         session, models.SwitchMachine,
         switch_id=switch.id
     )
-    for switch_machine in machines.items():
+    for switch_machine in machines:
         _update_machine_internal(
             session, switch.id, **switch_machine
         )
diff --git a/compass/db/api/user.py b/compass/db/api/user.py
index 30156f12..96ae96da 100644
--- a/compass/db/api/user.py
+++ b/compass/db/api/user.py
@@ -367,7 +367,7 @@ def update_user(session, updater, user_id, **kwargs):
         allowed_fields |= set(ADMIN_UPDATED_FIELDS)
     if updater.id == user_id:
         allowed_fields |= set(SELF_UPDATED_FIELDS)
-    unsupported_fields = allowed_fields - set(kwargs)
+    unsupported_fields = set(kwargs) - allowed_fields
     if unsupported_fields:
             # The user is not allowed to update a user.
         raise exception.Forbidden(
diff --git a/compass/db/api/user_log.py b/compass/db/api/user_log.py
index 531dcad0..c5fcae23 100644
--- a/compass/db/api/user_log.py
+++ b/compass/db/api/user_log.py
@@ -35,40 +35,15 @@ def log_user_action(session, user_id, action):
     )
 
 
-def _compress_response(actions, user_id):
-    user_actions = []
-    for action in actions:
-        action_dict = action.to_dict()
-        del action_dict['user_id']
-        user_actions.append(action_dict)
-    return {'user_id': user_id, 'logs': user_actions}
-
-
-def _compress_response_by_user(actions):
-    actions_by_user = {}
-    for action in actions:
-        action_dict = action.to_dict()
-        user_id = action_dict['user_id']
-        del action_dict['user_id']
-        actions_by_user.setdefault(user_id, []).append(action_dict)
-
-    return [
-        {'user_id': user_id, 'logs': user_actions}
-        for user_id, user_actions in actions_by_user.items()
-    ]
-
-
 @utils.supported_filters(optional_support_keys=USER_SUPPORTED_FIELDS)
 @user_api.check_user_admin_or_owner()
 @database.run_in_session()
 @utils.wrap_to_dict(RESP_FIELDS)
 def list_user_actions(session, lister, user_id, **filters):
     """list user actions."""
-    return _compress_response(
-        utils.list_db_objects(
-            session, models.UserLog, user_id=user_id, **filters
-        ),
-        user_id
+    return utils.list_db_objects(
+        session, models.UserLog, order_by=['timestamp'],
+        user_id=user_id, **filters
     )
 
 
@@ -78,35 +53,28 @@ def list_user_actions(session, lister, user_id, **filters):
 @utils.wrap_to_dict(RESP_FIELDS)
 def list_actions(session, lister, **filters):
     """list actions."""
-    return _compress_response_by_user(
-        utils.list_db_objects(
-            session, models.UserLog, **filters
-        )
+    return utils.list_db_objects(
+        session, models.UserLog, order_by=['timestamp'], **filters
     )
 
 
-@utils.supported_filters(optional_support_keys=USER_SUPPORTED_FIELDS)
+@utils.supported_filters()
 @user_api.check_user_admin_or_owner()
 @database.run_in_session()
 @utils.wrap_to_dict(RESP_FIELDS)
 def del_user_actions(session, deleter, user_id, **filters):
     """delete user actions."""
-    return _compress_response(
-        utils.del_db_objects(
-            session, models.UserLog, user_id=user_id, **filters
-        ),
-        user_id
+    return utils.del_db_objects(
+        session, models.UserLog, user_id=user_id, **filters
     )
 
 
-@utils.supported_filters(optional_support_keys=SUPPORTED_FIELDS)
+@utils.supported_filters()
 @user_api.check_user_admin()
 @database.run_in_session()
 @utils.wrap_to_dict(RESP_FIELDS)
 def del_actions(session, deleter, **filters):
     """delete actions."""
-    return _compress_response_by_user(
-        utils.del_db_objects(
-            session, models.UserLog, **filters
-        )
+    return utils.del_db_objects(
+        session, models.UserLog, **filters
     )
diff --git a/compass/db/api/utils.py b/compass/db/api/utils.py
index 04352253..d20f09df 100644
--- a/compass/db/api/utils.py
+++ b/compass/db/api/utils.py
@@ -77,12 +77,38 @@ def _between_condition(col_attr, value):
     return None
 
 
+def model_order_by(query, model, order_by):
+    if not order_by:
+        return query
+    order_by_cols = []
+    for key in order_by:
+        if isinstance(key, tuple):
+            key, is_desc = key
+        else:
+            is_desc = False
+        if isinstance(key, basestring):
+            if hasattr(model, key):
+                col_attr = getattr(model, key)
+            else:
+                continue
+        else:
+            col_attr = key
+        if is_desc:
+            order_by_cols.append(col_attr.desc())
+        else:
+            order_by_cols.append(col_attr)
+    return query.order_by(*order_by_cols)
+
+
 def model_filter(query, model, **filters):
     for key, value in filters.items():
-        if hasattr(model, key):
-            col_attr = getattr(model, key)
+        if isinstance(key, basestring):
+            if hasattr(model, key):
+                col_attr = getattr(model, key)
+            else:
+                continue
         else:
-            continue
+            col_attr = key
         if isinstance(value, list):
             query = query.filter(col_attr.in_(value))
         elif isinstance(value, dict):
@@ -505,15 +531,21 @@ def add_db_object(session, table, exception_when_existing=True,
         return db_object
 
 
-def list_db_objects(session, table, **filters):
+def list_db_objects(session, table, order_by=[], **filters):
     """List db objects."""
     with session.begin(subtransactions=True):
         logging.debug(
             'session %s list db objects by filters %s in table %s',
             session, filters, table.__name__
         )
-        db_objects = model_filter(
-            model_query(session, table), table, **filters
+        db_objects = model_order_by(
+            model_filter(
+                model_query(session, table),
+                table,
+                **filters
+            ),
+            table,
+            order_by
         ).all()
         logging.debug(
             'session %s got listed db objects: %s',
diff --git a/compass/db/models.py b/compass/db/models.py
index c3a20ada..da1c4155 100644
--- a/compass/db/models.py
+++ b/compass/db/models.py
@@ -121,7 +121,7 @@ class HelperMixin(object):
 
 
 class MetadataMixin(HelperMixin):
-    name = Column(String(80))
+    name = Column(String(80), nullable=False)
     display_name = Column(String(80))
     path = Column(String(256))
     description = Column(Text)
@@ -309,7 +309,7 @@ class MetadataMixin(HelperMixin):
 
 class FieldMixin(HelperMixin):
     id = Column(Integer, primary_key=True)
-    field = Column(String(80), unique=True)
+    field = Column(String(80), unique=True, nullable=False)
     field_type_data = Column(
         'field_type',
         Enum(
@@ -395,8 +395,8 @@ class FieldMixin(HelperMixin):
 
 
 class InstallerMixin(HelperMixin):
-    name = Column(String(80))
-    alias = Column(String(80), unique=True)
+    name = Column(String(80), nullable=False)
+    alias = Column(String(80), unique=True, nullable=False)
     settings = Column(JSONEncoded, default={})
 
     def validate(self):
@@ -468,12 +468,12 @@ class HostNetwork(BASE, TimestampMixin, HelperMixin):
         ForeignKey('host.id', onupdate='CASCADE', ondelete='CASCADE')
     )
     interface = Column(
-        String(80))
+        String(80), nullable=False)
     subnet_id = Column(
         Integer,
         ForeignKey('subnet.id', onupdate='CASCADE', ondelete='CASCADE')
     )
-    ip_int = Column(BigInteger, unique=True)
+    ip_int = Column(BigInteger, unique=True, nullable=False)
     is_mgmt = Column(Boolean, default=False)
     is_promiscuous = Column(Boolean, default=False)
 
@@ -543,7 +543,7 @@ class ClusterHostLogHistory(BASE, LogHistoryMixin):
         ForeignKey('clusterhost.id', onupdate='CASCADE', ondelete='CASCADE'),
         primary_key=True
     )
-    filename = Column(String(80), primary_key=True)
+    filename = Column(String(80), primary_key=True, nullable=False)
     cluster_id = Column(
         Integer,
         ForeignKey('cluster.id')
@@ -573,7 +573,7 @@ class HostLogHistory(BASE, LogHistoryMixin):
         Integer,
         ForeignKey('host.id', onupdate='CASCADE', ondelete='CASCADE'),
         primary_key=True)
-    filename = Column(String(80), primary_key=True)
+    filename = Column(String(80), primary_key=True, nullable=False)
 
     def __init__(self, id, filename, **kwargs):
         self.id = id
@@ -754,7 +754,7 @@ class ClusterHost(BASE, TimestampMixin, HelperMixin):
 
     @hostname.expression
     def hostname(cls):
-        return cls.host.name
+        return Host.hostname
 
     @property
     def distributed_system_installed(self):
@@ -897,7 +897,7 @@ class Host(BASE, TimestampMixin, HelperMixin):
     """Host table."""
     __tablename__ = 'host'
 
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=True)
     os_id = Column(Integer, ForeignKey('os.id'))
     config_step = Column(String(80), default='')
     os_config = Column(JSONEncoded, default={})
@@ -954,10 +954,7 @@ class Host(BASE, TimestampMixin, HelperMixin):
 
     @hybrid_property
     def hostname(self):
-        if self.name == str(self.id):
-            return None
-        else:
-            return self.name
+        return self.name
 
     @hostname.expression
     def hostname(cls):
@@ -988,13 +985,9 @@ class Host(BASE, TimestampMixin, HelperMixin):
 
     def __init__(self, id, **kwargs):
         self.id = id
-        self.name = str(self.id)
         self.state = HostState()
         super(Host, self).__init__(**kwargs)
 
-    def initialize(self):
-        super(Host, self).initialize()
-
     def update(self):
         creator = self.creator
         if creator:
@@ -1160,7 +1153,7 @@ class Cluster(BASE, TimestampMixin, HelperMixin):
     __tablename__ = 'cluster'
 
     id = Column(Integer, primary_key=True)
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=False)
     reinstall_distributed_system = Column(Boolean, default=True)
     config_step = Column(String(80), default='')
     os_id = Column(Integer, ForeignKey('os.id'))
@@ -1184,7 +1177,7 @@ class Cluster(BASE, TimestampMixin, HelperMixin):
     deployed_package_config = Column(JSONEncoded, default={})
     config_validated = Column(Boolean, default=False)
     adapter_id = Column(Integer, ForeignKey('adapter.id'))
-    adapter_name = Column(String(80), nullable=True)
+    adapter_name = Column(String(80))
     creator_id = Column(Integer, ForeignKey('user.id'))
     owner = Column(String(80))
     clusterhosts = relationship(
@@ -1240,12 +1233,6 @@ class Cluster(BASE, TimestampMixin, HelperMixin):
                 self.flavor_name = flavor.name
             else:
                 self.flavor_name = None
-        else:
-            self.adapter_name = None
-            self.distributed_system = None
-            self.distributed_system_name = None
-            self.flavor = None
-            self.flavor_name = None
         super(Cluster, self).update()
 
     def validate(self):
@@ -1403,7 +1390,7 @@ class Permission(BASE, HelperMixin, TimestampMixin):
     __tablename__ = 'permission'
 
     id = Column(Integer, primary_key=True)
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=False)
     alias = Column(String(100))
     description = Column(Text)
     user_permissions = relationship(
@@ -1427,7 +1414,7 @@ class UserToken(BASE, HelperMixin):
         Integer,
         ForeignKey('user.id', onupdate='CASCADE', ondelete='CASCADE')
     )
-    token = Column(String(256), unique=True)
+    token = Column(String(256), unique=True, nullable=False)
     expire_timestamp = Column(
         DateTime, default=lambda: datetime.datetime.now()
     )
@@ -1473,7 +1460,7 @@ class User(BASE, HelperMixin, TimestampMixin):
     __tablename__ = 'user'
 
     id = Column(Integer, primary_key=True)
-    email = Column(String(80), unique=True)
+    email = Column(String(80), unique=True, nullable=False)
     crypted_password = Column('password', String(225))
     firstname = Column(String(80))
     lastname = Column(String(80))
@@ -1699,7 +1686,7 @@ class Machine(BASE, HelperMixin, TimestampMixin):
     """Machine table."""
     __tablename__ = 'machine'
     id = Column(Integer, primary_key=True)
-    mac = Column(String(24), unique=True)
+    mac = Column(String(24), unique=True, nullable=False)
     ipmi_credentials = Column(JSONEncoded, default={})
     tag = Column(JSONEncoded, default={})
     location = Column(JSONEncoded, default={})
@@ -1787,7 +1774,7 @@ class Switch(BASE, HelperMixin, TimestampMixin):
     """Switch table."""
     __tablename__ = 'switch'
     id = Column(Integer, primary_key=True)
-    ip_int = Column('ip', BigInteger, unique=True)
+    ip_int = Column('ip', BigInteger, unique=True, nullable=False)
     credentials = Column(JSONEncoded, default={})
     vendor = Column(String(256), nullable=True)
     state = Column(Enum('initialized', 'unreachable', 'notsupported',
@@ -2075,7 +2062,7 @@ class OperatingSystem(BASE, HelperMixin):
         ForeignKey('os.id', onupdate='CASCADE', ondelete='CASCADE'),
         nullable=True
     )
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=False)
     deployable = Column(Boolean, default=False)
 
     metadatas = relationship(
@@ -2190,7 +2177,7 @@ class AdapterFlavor(BASE, HelperMixin):
         Integer,
         ForeignKey('adapter.id', onupdate='CASCADE', ondelete='CASCADE')
     )
-    name = Column(String(80))
+    name = Column(String(80), nullable=False)
     display_name = Column(String(80))
     template = Column(String(80))
     _ordered_flavor_roles = Column(
@@ -2269,7 +2256,7 @@ class AdapterRole(BASE, HelperMixin):
 
     __tablename__ = "adapter_role"
     id = Column(Integer, primary_key=True)
-    name = Column(String(80))
+    name = Column(String(80), nullable=False)
     display_name = Column(String(80))
     description = Column(Text)
     optional = Column(Boolean, default=False)
@@ -2377,7 +2364,7 @@ class Adapter(BASE, HelperMixin):
     __tablename__ = 'adapter'
 
     id = Column(Integer, primary_key=True)
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=False)
     display_name = Column(String(80))
     parent_id = Column(
         Integer,
@@ -2548,9 +2535,6 @@ class Adapter(BASE, HelperMixin):
     def to_dict(self):
         dict_info = super(Adapter, self).to_dict()
         dict_info.update({
-            'roles': [
-                role.to_dict() for role in self.adapter_roles
-            ],
             'supported_oses': [
                 adapter_os.to_dict()
                 for adapter_os in self.adapter_supported_oses
@@ -2585,7 +2569,7 @@ class DistributedSystem(BASE, HelperMixin):
         ),
         nullable=True
     )
-    name = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=False)
     deployable = Column(Boolean, default=False)
 
     adapters = relationship(
@@ -2650,8 +2634,8 @@ class Subnet(BASE, TimestampMixin, HelperMixin):
     __tablename__ = 'subnet'
 
     id = Column(Integer, primary_key=True)
-    name = Column(String(80), unique=True)
-    subnet = Column(String(80), unique=True)
+    name = Column(String(80), unique=True, nullable=True)
+    subnet = Column(String(80), unique=True, nullable=False)
 
     host_networks = relationship(
         HostNetwork,
@@ -2664,7 +2648,8 @@ class Subnet(BASE, TimestampMixin, HelperMixin):
         self.subnet = subnet
         super(Subnet, self).__init__(**kwargs)
 
-    def initialize(self):
+    def to_dict(self):
+        dict_info = super(Subnet, self).to_dict()
         if not self.name:
-            self.name = self.subnet
-        super(Subnet, self).initialize()
+            dict_info['name'] = self.subnet
+        return dict_info
diff --git a/compass/tests/api/test_api.py b/compass/tests/api/test_api.py
index 999a83f8..706741a6 100644
--- a/compass/tests/api/test_api.py
+++ b/compass/tests/api/test_api.py
@@ -720,17 +720,6 @@ class TestAdapterAPI(ApiTestCase):
         return_value = self.get(url)
         self.assertEqual(return_value.status_code, 404)
 
-    def test_show_adapter_roles(self):
-        # get adapter role successfully
-        url = '/adapters/%s/roles' % self.adapter_id
-        return_value = self.get(url)
-        self.assertEqual(return_value.status_code, 200)
-
-        # give a non-existed id
-        url = '/adapters/99/roles'
-        return_value = self.get(url)
-        self.assertEqual(return_value.status_code, 404)
-
 
 class TestHostAPI(ApiTestCase):
     """Test host api."""
@@ -784,13 +773,15 @@ class TestHostAPI(ApiTestCase):
         url = '/hosts/1/networks'
         datas = [
             {
-                'ip': '179049563',
+                'interface': 'eth0',
+                'ip': '10.172.20.91',
                 'subnet_id': 1,
                 'is_mgmt': False,
                 'is_promiscuous': False
             },
             {
-                'ip': '179049582',
+                'interface': 'eth1',
+                'ip': '10.172.20.110',
                 'subnet_id': 1,
                 'is_mgmt': False,
                 'is_promiscuous': False
@@ -883,7 +874,7 @@ class TestHostAPI(ApiTestCase):
         return_value = self.get(url)
         resp = json.loads(return_value.get_data())
         count = len(resp)
-        self.assertEqual(count, 1)
+        self.assertEqual(count, 2)
         self.assertEqual(return_value.status_code, 200)
 
     def test_show_host_network(self):
diff --git a/compass/tests/db/api/test_adapter_holder.py b/compass/tests/db/api/test_adapter_holder.py
index 9689d45f..1be6273a 100644
--- a/compass/tests/db/api/test_adapter_holder.py
+++ b/compass/tests/db/api/test_adapter_holder.py
@@ -143,49 +143,6 @@ class TestGetAdapter(AdapterTestCase):
         )
 
 
-class TestGetAdapterRoles(AdapterTestCase):
-    """Test get adapter roles."""
-
-    def setUp(self):
-        super(TestGetAdapterRoles, self).setUp()
-
-    def tearDown(self):
-        super(TestGetAdapterRoles, self).tearDown()
-
-    def test_get_adapter_roles(self):
-        adapter_roles = adapter.get_adapter_roles(
-            self.user_object,
-            self.adapter_id
-        )
-        result = []
-        for adapter_role in adapter_roles:
-            for k, v in adapter_role.items():
-                if k == 'display_name':
-                    result.append(v)
-        expected = [
-            'compute node',
-            'network node',
-            'storage node',
-            'image node',
-            'vnc proxy node',
-            'controller node',
-            'message queue node',
-            'database node',
-            'ha proxy node',
-            'all in one compute'
-        ]
-        self.assertIsNotNone(adapter_roles)
-        self.assertListEqual(result, expected)
-
-    def test_adapter_non_exist(self):
-        self.assertRaises(
-            exception.RecordNotExists,
-            adapter.get_adapter_roles,
-            self.user_object,
-            99
-        )
-
-
 if __name__ == '__main__':
     flags.init()
     logsetting.init()
diff --git a/compass/tests/db/api/test_user.py b/compass/tests/db/api/test_user.py
index 2ec35f27..fd336663 100644
--- a/compass/tests/db/api/test_user.py
+++ b/compass/tests/db/api/test_user.py
@@ -223,11 +223,14 @@ class TestUpdateUser(BaseTest):
             password='dummy',
             is_admin=False
         )
+        user_object = user_api.get_user_object('dummy@abc.com')
+        print 'user object: %s' % user_object
         self.assertRaises(
             exception.Forbidden,
             user_api.update_user,
-            self.user_object,
-            2
+            user_object,
+            2,
+            is_admin=False
         )
 
 
diff --git a/compass/tests/db/api/test_user_log.py b/compass/tests/db/api/test_user_log.py
index 62a48099..12535fa9 100644
--- a/compass/tests/db/api/test_user_log.py
+++ b/compass/tests/db/api/test_user_log.py
@@ -54,7 +54,7 @@ class TestListUserActions(BaseTest):
         )
         self.assertEqual(
             1,
-            user_action['user_id']
+            user_action[0]['user_id']
         )
 
     def test_list_none_user_actions(self):
@@ -66,7 +66,7 @@ class TestListUserActions(BaseTest):
             self.user_object,
             2
         )
-        self.assertEqual([], user_action['logs'])
+        self.assertEqual([], user_action)
 
 
 class TestListActions(BaseTest):
@@ -109,7 +109,7 @@ class TestDelUserActions(BaseTest):
             self.user_object,
             self.user_object.id
         )
-        self.assertEqual([], del_user_action['logs'])
+        self.assertEqual([], del_user_action)
 
 
 class TestDelActions(BaseTest):