Changeset - 8c99d5d8eb0e
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Mads Kiilerich - 6 years ago 2020-01-02 00:57:38
mads@kiilerich.com
Grafted from: 7c11d8ff3bf7
cleanup: fix db.py "import *"

pyflakes rightfully complains about wildcard imports. But we like to keep the
short names, so let's just be explicit about which names we import.
1 file changed with 10 insertions and 10 deletions:
0 comments (0 inline, 0 general)
kallithea/model/db.py
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# -*- coding: utf-8 -*-
 
# This program is free software: you can redistribute it and/or modify
 
# it under the terms of the GNU General Public License as published by
 
# the Free Software Foundation, either version 3 of the License, or
 
# (at your option) any later version.
 
#
 
# This program is distributed in the hope that it will be useful,
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
# GNU General Public License for more details.
 
#
 
# You should have received a copy of the GNU General Public License
 
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
"""
 
kallithea.model.db
 
~~~~~~~~~~~~~~~~~~
 

	
 
Database Models for Kallithea
 

	
 
This file was forked by the Kallithea project in July 2014.
 
Original author and date, and relevant copyright and licensing information is below:
 
:created_on: Apr 08, 2010
 
:author: marcink
 
:copyright: (c) 2013 RhodeCode GmbH, and others.
 
:license: GPLv3, see LICENSE.md for more details.
 
"""
 

	
 
import base64
 
import collections
 
import datetime
 
import functools
 
import hashlib
 
import logging
 
import os
 
import time
 
import traceback
 

	
 
import ipaddr
 
import sqlalchemy
 
from beaker.cache import cache_region, region_invalidate
 
from sqlalchemy import *
 
from sqlalchemy import Boolean, Column, DateTime, Float, ForeignKey, Index, Integer, LargeBinary, String, Unicode, UnicodeText, UniqueConstraint
 
from sqlalchemy.ext.hybrid import hybrid_property
 
from sqlalchemy.orm import class_mapper, joinedload, relationship, validates
 
from tg.i18n import lazy_ugettext as _
 
from webob.exc import HTTPNotFound
 

	
 
import kallithea
 
from kallithea.lib.caching_query import FromCache
 
from kallithea.lib.compat import json
 
from kallithea.lib.exceptions import DefaultUserException
 
from kallithea.lib.utils2 import (
 
    Optional, aslist, get_changeset_safe, get_clone_url, remove_prefix, safe_bytes, safe_int, safe_str, safe_unicode, str2bool, urlreadable)
 
from kallithea.lib.vcs import get_backend
 
from kallithea.lib.vcs.backends.base import EmptyChangeset
 
from kallithea.lib.vcs.utils.helpers import get_scm
 
from kallithea.lib.vcs.utils.lazy import LazyProperty
 
from kallithea.model.meta import Base, Session
 

	
 

	
 
URL_SEP = '/'
 
log = logging.getLogger(__name__)
 

	
 
#==============================================================================
 
# BASE CLASSES
 
#==============================================================================
 

	
 
def _hash_key(k):
 
    return hashlib.md5(safe_bytes(k)).hexdigest()
 

	
 

	
 
class BaseDbModel(object):
 
    """
 
    Base Model for all classes
 
    """
 

	
 
    @classmethod
 
    def _get_keys(cls):
 
        """return column names for this model """
 
        # Note: not a normal dict - iterator gives "users.firstname", but keys gives "firstname"
 
        return class_mapper(cls).c.keys()
 

	
 
    def get_dict(self):
 
        """
 
        return dict with keys and values corresponding
 
        to this model data """
 

	
 
        d = {}
 
        for k in self._get_keys():
 
            d[k] = getattr(self, k)
 
@@ -522,142 +522,142 @@ class User(Base, BaseDbModel):
 

	
 
        try:
 
            return json.loads(self._user_data)
 
        except TypeError:
 
            return {}
 

	
 
    @user_data.setter
 
    def user_data(self, val):
 
        try:
 
            self._user_data = json.dumps(val)
 
        except Exception:
 
            log.error(traceback.format_exc())
 

	
 
    def __repr__(self):
 
        return "<%s %s: %r')>" % (self.__class__.__name__, self.user_id, self.username)
 

	
 
    @classmethod
 
    def guess_instance(cls, value):
 
        return super(User, cls).guess_instance(value, User.get_by_username)
 

	
 
    @classmethod
 
    def get_or_404(cls, id_, allow_default=True):
 
        '''
 
        Overridden version of BaseDbModel.get_or_404, with an extra check on
 
        the default user.
 
        '''
 
        user = super(User, cls).get_or_404(id_)
 
        if not allow_default and user.is_default_user:
 
            raise DefaultUserException()
 
        return user
 

	
 
    @classmethod
 
    def get_by_username_or_email(cls, username_or_email, case_insensitive=False, cache=False):
 
        """
 
        For anything that looks like an email address, look up by the email address (matching
 
        case insensitively).
 
        For anything else, try to look up by the user name.
 

	
 
        This assumes no normal username can have '@' symbol.
 
        """
 
        if '@' in username_or_email:
 
            return User.get_by_email(username_or_email, cache=cache)
 
        else:
 
            return User.get_by_username(username_or_email, case_insensitive=case_insensitive, cache=cache)
 

	
 
    @classmethod
 
    def get_by_username(cls, username, case_insensitive=False, cache=False):
 
        if case_insensitive:
 
            q = cls.query().filter(func.lower(cls.username) == func.lower(username))
 
            q = cls.query().filter(sqlalchemy.func.lower(cls.username) == sqlalchemy.func.lower(username))
 
        else:
 
            q = cls.query().filter(cls.username == username)
 

	
 
        if cache:
 
            q = q.options(FromCache(
 
                            "sql_cache_short",
 
                            "get_user_%s" % _hash_key(username)
 
                          )
 
            )
 
        return q.scalar()
 

	
 
    @classmethod
 
    def get_by_api_key(cls, api_key, cache=False, fallback=True):
 
        if len(api_key) != 40 or not api_key.isalnum():
 
            return None
 

	
 
        q = cls.query().filter(cls.api_key == api_key)
 

	
 
        if cache:
 
            q = q.options(FromCache("sql_cache_short",
 
                                    "get_api_key_%s" % api_key))
 
        res = q.scalar()
 

	
 
        if fallback and not res:
 
            # fallback to additional keys
 
            _res = UserApiKeys.query().filter_by(api_key=api_key, is_expired=False).first()
 
            if _res:
 
                res = _res.user
 
        if res is None or not res.active or res.is_default_user:
 
            return None
 
        return res
 

	
 
    @classmethod
 
    def get_by_email(cls, email, cache=False):
 
        q = cls.query().filter(func.lower(cls.email) == func.lower(email))
 
        q = cls.query().filter(sqlalchemy.func.lower(cls.email) == sqlalchemy.func.lower(email))
 

	
 
        if cache:
 
            q = q.options(FromCache("sql_cache_short",
 
                                    "get_email_key_%s" % email))
 

	
 
        ret = q.scalar()
 
        if ret is None:
 
            q = UserEmailMap.query()
 
            # try fetching in alternate email map
 
            q = q.filter(func.lower(UserEmailMap.email) == func.lower(email))
 
            q = q.filter(sqlalchemy.func.lower(UserEmailMap.email) == sqlalchemy.func.lower(email))
 
            q = q.options(joinedload(UserEmailMap.user))
 
            if cache:
 
                q = q.options(FromCache("sql_cache_short",
 
                                        "get_email_map_key_%s" % email))
 
            ret = getattr(q.scalar(), 'user', None)
 

	
 
        return ret
 

	
 
    @classmethod
 
    def get_from_cs_author(cls, author):
 
        """
 
        Tries to get User objects out of commit author string
 

	
 
        :param author:
 
        """
 
        from kallithea.lib.helpers import email, author_name
 
        # Valid email in the attribute passed, see if they're in the system
 
        _email = email(author)
 
        if _email:
 
            user = cls.get_by_email(_email)
 
            if user is not None:
 
                return user
 
        # Maybe we can match by username?
 
        _author = author_name(author)
 
        user = cls.get_by_username(_author, case_insensitive=True)
 
        if user is not None:
 
            return user
 

	
 
    def update_lastlogin(self):
 
        """Update user lastlogin"""
 
        self.last_login = datetime.datetime.now()
 
        log.debug('updated user %s lastlogin', self.username)
 

	
 
    @classmethod
 
    def get_first_admin(cls):
 
        user = User.query().filter(User.admin == True).first()
 
        if user is None:
 
            raise Exception('Missing administrative account!')
 
        return user
 

	
 
    @classmethod
 
    def get_default_user(cls, cache=False):
 
        user = User.get_by_username(User.DEFAULT_USER, cache=cache)
 
        if user is None:
 
            raise Exception('Missing default account!')
 
        return user
 

	
 
    def get_api_data(self, details=False):
 
@@ -812,97 +812,97 @@ class UserGroup(Base, BaseDbModel):
 

	
 
    users_group_id = Column(Integer(), primary_key=True)
 
    users_group_name = Column(Unicode(255), nullable=False, unique=True)
 
    user_group_description = Column(Unicode(10000), nullable=True) # FIXME: not nullable?
 
    users_group_active = Column(Boolean(), nullable=False)
 
    owner_id = Column('user_id', Integer(), ForeignKey('users.user_id'), nullable=False)
 
    created_on = Column(DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
 
    _group_data = Column("group_data", LargeBinary(), nullable=True)  # JSON data # FIXME: not nullable?
 

	
 
    members = relationship('UserGroupMember', cascade="all, delete-orphan")
 
    users_group_to_perm = relationship('UserGroupToPerm', cascade='all')
 
    users_group_repo_to_perm = relationship('UserGroupRepoToPerm', cascade='all')
 
    users_group_repo_group_to_perm = relationship('UserGroupRepoGroupToPerm', cascade='all')
 
    user_user_group_to_perm = relationship('UserUserGroupToPerm ', cascade='all')
 
    user_group_user_group_to_perm = relationship('UserGroupUserGroupToPerm ', primaryjoin="UserGroupUserGroupToPerm.target_user_group_id==UserGroup.users_group_id", cascade='all')
 

	
 
    owner = relationship('User')
 

	
 
    @hybrid_property
 
    def group_data(self):
 
        if not self._group_data:
 
            return {}
 

	
 
        try:
 
            return json.loads(self._group_data)
 
        except TypeError:
 
            return {}
 

	
 
    @group_data.setter
 
    def group_data(self, val):
 
        try:
 
            self._group_data = json.dumps(val)
 
        except Exception:
 
            log.error(traceback.format_exc())
 

	
 
    def __repr__(self):
 
        return "<%s %s: %r')>" % (self.__class__.__name__,
 
                                  self.users_group_id,
 
                                  self.users_group_name)
 

	
 
    @classmethod
 
    def guess_instance(cls, value):
 
        return super(UserGroup, cls).guess_instance(value, UserGroup.get_by_group_name)
 

	
 
    @classmethod
 
    def get_by_group_name(cls, group_name, cache=False,
 
                          case_insensitive=False):
 
        if case_insensitive:
 
            q = cls.query().filter(func.lower(cls.users_group_name) == func.lower(group_name))
 
            q = cls.query().filter(sqlalchemy.func.lower(cls.users_group_name) == sqlalchemy.func.lower(group_name))
 
        else:
 
            q = cls.query().filter(cls.users_group_name == group_name)
 
        if cache:
 
            q = q.options(FromCache(
 
                            "sql_cache_short",
 
                            "get_group_%s" % _hash_key(group_name)
 
                          )
 
            )
 
        return q.scalar()
 

	
 
    @classmethod
 
    def get(cls, user_group_id, cache=False):
 
        user_group = cls.query()
 
        if cache:
 
            user_group = user_group.options(FromCache("sql_cache_short",
 
                                    "get_users_group_%s" % user_group_id))
 
        return user_group.get(user_group_id)
 

	
 
    def get_api_data(self, with_members=True):
 
        user_group = self
 

	
 
        data = dict(
 
            users_group_id=user_group.users_group_id,
 
            group_name=user_group.users_group_name,
 
            group_description=user_group.user_group_description,
 
            active=user_group.users_group_active,
 
            owner=user_group.owner.username,
 
        )
 
        if with_members:
 
            data['members'] = [
 
                ugm.user.get_api_data()
 
                for ugm in user_group.members
 
            ]
 

	
 
        return data
 

	
 

	
 
class UserGroupMember(Base, BaseDbModel):
 
    __tablename__ = 'users_groups_members'
 
    __table_args__ = (
 
        _table_args_default_dict,
 
    )
 

	
 
    users_group_member_id = Column(Integer(), primary_key=True)
 
    users_group_id = Column(Integer(), ForeignKey('users_groups.users_group_id'), nullable=False)
 
    user_id = Column(Integer(), ForeignKey('users.user_id'), nullable=False)
 

	
 
    user = relationship('User')
 
@@ -1009,125 +1009,125 @@ class Repository(Base, BaseDbModel):
 
                    cascade="all, delete-orphan")
 

	
 
    def __repr__(self):
 
        return "<%s %s: %r>" % (self.__class__.__name__,
 
                                  self.repo_id, self.repo_name)
 

	
 
    @hybrid_property
 
    def landing_rev(self):
 
        # always should return [rev_type, rev]
 
        if self._landing_revision:
 
            _rev_info = self._landing_revision.split(':')
 
            if len(_rev_info) < 2:
 
                _rev_info.insert(0, 'rev')
 
            return [_rev_info[0], _rev_info[1]]
 
        return [None, None]
 

	
 
    @landing_rev.setter
 
    def landing_rev(self, val):
 
        if ':' not in val:
 
            raise ValueError('value must be delimited with `:` and consist '
 
                             'of <rev_type>:<rev>, got %s instead' % val)
 
        self._landing_revision = val
 

	
 
    @hybrid_property
 
    def changeset_cache(self):
 
        try:
 
            cs_cache = json.loads(self._changeset_cache) # might raise on bad data
 
            cs_cache['raw_id'] # verify data, raise exception on error
 
            return cs_cache
 
        except (TypeError, KeyError, ValueError):
 
            return EmptyChangeset().__json__()
 

	
 
    @changeset_cache.setter
 
    def changeset_cache(self, val):
 
        try:
 
            self._changeset_cache = json.dumps(val)
 
        except Exception:
 
            log.error(traceback.format_exc())
 

	
 
    @classmethod
 
    def query(cls, sorted=False):
 
        """Add Repository-specific helpers for common query constructs.
 

	
 
        sorted: if True, apply the default ordering (name, case insensitive).
 
        """
 
        q = super(Repository, cls).query()
 

	
 
        if sorted:
 
            q = q.order_by(func.lower(Repository.repo_name))
 
            q = q.order_by(sqlalchemy.func.lower(Repository.repo_name))
 

	
 
        return q
 

	
 
    @classmethod
 
    def url_sep(cls):
 
        return URL_SEP
 

	
 
    @classmethod
 
    def normalize_repo_name(cls, repo_name):
 
        """
 
        Normalizes os specific repo_name to the format internally stored inside
 
        database using URL_SEP
 

	
 
        :param cls:
 
        :param repo_name:
 
        """
 
        return cls.url_sep().join(repo_name.split(os.sep))
 

	
 
    @classmethod
 
    def guess_instance(cls, value):
 
        return super(Repository, cls).guess_instance(value, Repository.get_by_repo_name)
 

	
 
    @classmethod
 
    def get_by_repo_name(cls, repo_name, case_insensitive=False):
 
        """Get the repo, defaulting to database case sensitivity.
 
        case_insensitive will be slower and should only be specified if necessary."""
 
        if case_insensitive:
 
            q = Session().query(cls).filter(func.lower(cls.repo_name) == func.lower(repo_name))
 
            q = Session().query(cls).filter(sqlalchemy.func.lower(cls.repo_name) == sqlalchemy.func.lower(repo_name))
 
        else:
 
            q = Session().query(cls).filter(cls.repo_name == repo_name)
 
        q = q.options(joinedload(Repository.fork)) \
 
                .options(joinedload(Repository.owner)) \
 
                .options(joinedload(Repository.group))
 
        return q.scalar()
 

	
 
    @classmethod
 
    def get_by_full_path(cls, repo_full_path):
 
        base_full_path = os.path.realpath(cls.base_path())
 
        repo_full_path = os.path.realpath(repo_full_path)
 
        assert repo_full_path.startswith(base_full_path + os.path.sep)
 
        repo_name = repo_full_path[len(base_full_path) + 1:]
 
        repo_name = cls.normalize_repo_name(repo_name)
 
        return cls.get_by_repo_name(repo_name.strip(URL_SEP))
 

	
 
    @classmethod
 
    def get_repo_forks(cls, repo_id):
 
        return cls.query().filter(Repository.fork_id == repo_id)
 

	
 
    @classmethod
 
    def base_path(cls):
 
        """
 
        Returns base path where all repos are stored
 

	
 
        :param cls:
 
        """
 
        q = Session().query(Ui) \
 
            .filter(Ui.ui_key == cls.url_sep())
 
        q = q.options(FromCache("sql_cache_short", "repository_repo_path"))
 
        return q.one().ui_value
 

	
 
    @property
 
    def forks(self):
 
        """
 
        Return forks of this repo
 
        """
 
        return Repository.get_repo_forks(self.repo_id)
 

	
 
    @property
 
    def parent(self):
 
        """
 
        Returns fork parent
 
        """
 
        return self.fork
 

	
 
    @property
 
    def just_name(self):
 
@@ -1430,136 +1430,136 @@ class Repository(Base, BaseDbModel):
 
                  alias, self.repo_full_path)
 
        backend = get_backend(alias)
 

	
 
        if alias == 'hg':
 
            repo = backend(repo_full_path, create=False,
 
                           baseui=self._ui)
 
        else:
 
            repo = backend(repo_full_path, create=False)
 

	
 
        return repo
 

	
 
    def __json__(self):
 
        return dict(
 
            repo_id=self.repo_id,
 
            repo_name=self.repo_name,
 
            landing_rev=self.landing_rev,
 
        )
 

	
 

	
 
class RepoGroup(Base, BaseDbModel):
 
    __tablename__ = 'groups'
 
    __table_args__ = (
 
        _table_args_default_dict,
 
    )
 

	
 
    SEP = ' &raquo; '
 

	
 
    group_id = Column(Integer(), primary_key=True)
 
    group_name = Column(Unicode(255), nullable=False, unique=True) # full path
 
    parent_group_id = Column('group_parent_id', Integer(), ForeignKey('groups.group_id'), nullable=True)
 
    group_description = Column(Unicode(10000), nullable=False)
 
    owner_id = Column('user_id', Integer(), ForeignKey('users.user_id'), nullable=False)
 
    created_on = Column(DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
 

	
 
    repo_group_to_perm = relationship('UserRepoGroupToPerm', cascade='all', order_by='UserRepoGroupToPerm.group_to_perm_id')
 
    users_group_to_perm = relationship('UserGroupRepoGroupToPerm', cascade='all')
 
    parent_group = relationship('RepoGroup', remote_side=group_id)
 
    owner = relationship('User')
 

	
 
    @classmethod
 
    def query(cls, sorted=False):
 
        """Add RepoGroup-specific helpers for common query constructs.
 

	
 
        sorted: if True, apply the default ordering (name, case insensitive).
 
        """
 
        q = super(RepoGroup, cls).query()
 

	
 
        if sorted:
 
            q = q.order_by(func.lower(RepoGroup.group_name))
 
            q = q.order_by(sqlalchemy.func.lower(RepoGroup.group_name))
 

	
 
        return q
 

	
 
    def __init__(self, group_name='', parent_group=None):
 
        self.group_name = group_name
 
        self.parent_group = parent_group
 

	
 
    def __repr__(self):
 
        return "<%s %s: %s>" % (self.__class__.__name__,
 
                                self.group_id, self.group_name)
 

	
 
    @classmethod
 
    def _generate_choice(cls, repo_group):
 
        """Return tuple with group_id and name as html literal"""
 
        from webhelpers2.html import literal
 
        if repo_group is None:
 
            return (-1, u'-- %s --' % _('top level'))
 
        return repo_group.group_id, literal(cls.SEP.join(repo_group.full_path_splitted))
 

	
 
    @classmethod
 
    def groups_choices(cls, groups):
 
        """Return tuples with group_id and name as html literal."""
 
        return sorted((cls._generate_choice(g) for g in groups),
 
                      key=lambda c: c[1].split(cls.SEP))
 

	
 
    @classmethod
 
    def url_sep(cls):
 
        return URL_SEP
 

	
 
    @classmethod
 
    def guess_instance(cls, value):
 
        return super(RepoGroup, cls).guess_instance(value, RepoGroup.get_by_group_name)
 

	
 
    @classmethod
 
    def get_by_group_name(cls, group_name, cache=False, case_insensitive=False):
 
        group_name = group_name.rstrip('/')
 
        if case_insensitive:
 
            gr = cls.query() \
 
                .filter(func.lower(cls.group_name) == func.lower(group_name))
 
                .filter(sqlalchemy.func.lower(cls.group_name) == sqlalchemy.func.lower(group_name))
 
        else:
 
            gr = cls.query() \
 
                .filter(cls.group_name == group_name)
 
        if cache:
 
            gr = gr.options(FromCache(
 
                            "sql_cache_short",
 
                            "get_group_%s" % _hash_key(group_name)
 
                            )
 
            )
 
        return gr.scalar()
 

	
 
    @property
 
    def parents(self):
 
        groups = []
 
        group = self.parent_group
 
        while group is not None:
 
            groups.append(group)
 
            group = group.parent_group
 
            assert group not in groups, group # avoid recursion on bad db content
 
        groups.reverse()
 
        return groups
 

	
 
    @property
 
    def children(self):
 
        return RepoGroup.query().filter(RepoGroup.parent_group == self)
 

	
 
    @property
 
    def name(self):
 
        return self.group_name.split(RepoGroup.url_sep())[-1]
 

	
 
    @property
 
    def full_path(self):
 
        return self.group_name
 

	
 
    @property
 
    def full_path_splitted(self):
 
        return self.group_name.split(RepoGroup.url_sep())
 

	
 
    @property
 
    def repositories(self):
 
        return Repository.query(sorted=True).filter_by(group=self)
 

	
 
    @property
 
    def repositories_recursive_count(self):
 
        cnt = self.repositories.count()
 

	
 
        def children_count(group):
 
            cnt = 0
 
@@ -1965,97 +1965,97 @@ class UserGroupRepoGroupToPerm(Base, Bas
 

	
 
    users_group = relationship('UserGroup')
 
    permission = relationship('Permission')
 
    group = relationship('RepoGroup')
 

	
 
    @classmethod
 
    def create(cls, user_group, repository_group, permission):
 
        n = cls()
 
        n.users_group = user_group
 
        n.group = repository_group
 
        n.permission = permission
 
        Session().add(n)
 
        return n
 

	
 

	
 
class Statistics(Base, BaseDbModel):
 
    __tablename__ = 'statistics'
 
    __table_args__ = (
 
         _table_args_default_dict,
 
    )
 

	
 
    stat_id = Column(Integer(), primary_key=True)
 
    repository_id = Column(Integer(), ForeignKey('repositories.repo_id'), nullable=False, unique=True)
 
    stat_on_revision = Column(Integer(), nullable=False)
 
    commit_activity = Column(LargeBinary(1000000), nullable=False) # JSON data
 
    commit_activity_combined = Column(LargeBinary(), nullable=False) # JSON data
 
    languages = Column(LargeBinary(1000000), nullable=False) # JSON data
 

	
 
    repository = relationship('Repository', single_parent=True)
 

	
 

	
 
class UserFollowing(Base, BaseDbModel):
 
    __tablename__ = 'user_followings'
 
    __table_args__ = (
 
        UniqueConstraint('user_id', 'follows_repository_id', name='uq_user_followings_user_repo'),
 
        UniqueConstraint('user_id', 'follows_user_id', name='uq_user_followings_user_user'),
 
        _table_args_default_dict,
 
    )
 

	
 
    user_following_id = Column(Integer(), primary_key=True)
 
    user_id = Column(Integer(), ForeignKey('users.user_id'), nullable=False)
 
    follows_repository_id = Column(Integer(), ForeignKey('repositories.repo_id'), nullable=True)
 
    follows_user_id = Column(Integer(), ForeignKey('users.user_id'), nullable=True)
 
    follows_from = Column(DateTime(timezone=False), nullable=False, default=datetime.datetime.now)
 

	
 
    user = relationship('User', primaryjoin='User.user_id==UserFollowing.user_id')
 

	
 
    follows_user = relationship('User', primaryjoin='User.user_id==UserFollowing.follows_user_id')
 
    follows_repository = relationship('Repository', order_by=lambda: func.lower(Repository.repo_name))
 
    follows_repository = relationship('Repository', order_by=lambda: sqlalchemy.func.lower(Repository.repo_name))
 

	
 
    @classmethod
 
    def get_repo_followers(cls, repo_id):
 
        return cls.query().filter(cls.follows_repository_id == repo_id)
 

	
 

	
 
class CacheInvalidation(Base, BaseDbModel):
 
    __tablename__ = 'cache_invalidation'
 
    __table_args__ = (
 
        Index('key_idx', 'cache_key'),
 
        _table_args_default_dict,
 
    )
 

	
 
    # cache_id, not used
 
    cache_id = Column(Integer(), primary_key=True)
 
    # cache_key as created by _get_cache_key
 
    cache_key = Column(Unicode(255), nullable=False, unique=True)
 
    # cache_args is a repo_name
 
    cache_args = Column(Unicode(255), nullable=False)
 
    # instance sets cache_active True when it is caching, other instances set
 
    # cache_active to False to indicate that this cache is invalid
 
    cache_active = Column(Boolean(), nullable=False, default=False)
 

	
 
    def __init__(self, cache_key, repo_name=''):
 
        self.cache_key = cache_key
 
        self.cache_args = repo_name
 
        self.cache_active = False
 

	
 
    def __repr__(self):
 
        return "<%s %s: %s=%s" % (
 
            self.__class__.__name__,
 
            self.cache_id, self.cache_key, self.cache_active)
 

	
 
    def _cache_key_partition(self):
 
        prefix, repo_name, suffix = self.cache_key.partition(self.cache_args)
 
        return prefix, repo_name, suffix
 

	
 
    def get_prefix(self):
 
        """
 
        get prefix that might have been used in _get_cache_key to
 
        generate self.cache_key. Only used for informational purposes
 
        in repo_edit.html.
 
        """
 
        # prefix, repo_name, suffix
 
        return self._cache_key_partition()[0]
 

	
 
    def get_suffix(self):
 
        """
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