Source code for anyblok.bloks.anyblok_core.system.blok

# This file is a part of the AnyBlok project
#    Copyright (C) 2014 Jean-Sebastien SUZANNE <>
# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file,You can
# obtain one at
from anyblok.blok import BlokManager
from anyblok.declarations import Declarations, listen, classmethod_cache
from anyblok.column import String, Integer, Selection
from anyblok.field import Function
from logging import getLogger
from os.path import join, isfile

logger = getLogger(__name__)
register = Declarations.register
System = Declarations.Model.System

[docs]@register(System) class Blok: STATES = { 'uninstalled': 'Uninstalled', 'installed': 'Installed', 'toinstall': 'To install', 'toupdate': 'To update', 'touninstall': 'To uninstall', 'undefined': 'Undefined', } name = String(primary_key=True, nullable=False) state = Selection(selections=STATES, default='uninstalled', nullable=False) author = String() order = Integer(default=-1, nullable=False) short_description = Function(fget='get_short_description') long_description = Function(fget='get_long_description') logo = Function(fget='get_logo') version = String(nullable=False) installed_version = String()
[docs] def get_short_description(self): """ fget of the ``short_description`` Column.Selection :rtype: the docstring of the blok """ blok = BlokManager.get( if hasattr(blok, '__doc__'): return blok.__doc__ or '' return ''
[docs] def get_long_description(self): """ fget of the ``long_description`` Column.Selection :rtype: the readme file of the blok """ blok = BlokManager.get( path = BlokManager.getPath( readme = getattr(blok, 'readme', 'README.rst') if readme == '__doc__': return blok.__doc__ file_path = join(path, readme) description = '' if isfile(file_path): with open(file_path, 'r') as fp: description = return description
def __repr__(self): return "%s (%s)" % (, self.state)
[docs] @classmethod def list_by_state(cls, *states): """ Return the blok name in function of the wanted states :param states: list of the state :rtype: list if state is a state, dict if the states is a list """ if not states: return None res = {state: [] for state in states} bloks = cls.query().filter(cls.state.in_(states)).order_by(cls.order) for blok in bloks.all(): res[blok.state].append( if len(states) == 1: return res[states[0]] return res
[docs] @classmethod def update_list(cls): """ Populate the bloks list and update the state of existing bloks """ # Do not remove blok because 2 or More AnyBlok api may use the same # Database for order, blok in enumerate(BlokManager.ordered_bloks): b = cls.query().filter( == blok) version = BlokManager.bloks[blok].version author = BlokManager.bloks[blok].author if b.count(): b.update(dict(order=order, version=version, author=author)) else: cls.insert(name=blok, order=order, version=version, author=author)
[docs] @classmethod def apply_state(cls, *bloks): """ Call the rigth method is the blok state change .. warning:: for the uninstallation the method called is ``uninstall_all`` :param bloks: list of the blok name load by the registry """ for blok in bloks: # Make the query in the loop to be sure to keep order b = cls.query().filter( == blok).first() if b.state in ('undefined', 'uninstalled', 'toinstall'): b.install() elif b.state == 'toupdate': b.upgrade() uninstalled_bloks = cls.query().filter( cls.state == 'uninstalled').all().name conditional_bloks_to_install = [] for blok in uninstalled_bloks: if cls.check_if_the_conditional_are_installed(blok): conditional_bloks_to_install.append(blok) if conditional_bloks_to_install: for b in conditional_bloks_to_install: cls.query().filter( == b).update( {cls.state: 'toinstall'}) return True return False
[docs] @classmethod def uninstall_all(cls, *bloksname): """ Search and call the uninstall method for all the uninstalled bloks .. warning:: Use the ``desc order`` to uninstall because we can't uninstall a dependancies before :param bloksname: list of the blok name to uninstall """ if not bloksname: return query = cls.query().filter( query = query.order_by(cls.order.desc()) bloks = query.all() if bloks: bloks.uninstall()
[docs] @classmethod def check_if_the_conditional_are_installed(cls, blok): """ Return True if all the conditions to install the blok are satisfied :param blok: blok name :rtype: boolean """ if blok in BlokManager.bloks: conditional = BlokManager.bloks[blok].conditional if conditional: query = cls.query().filter( query = query.filter( cls.state.in_(['installed', 'toinstall', 'toupdate'])) if len(conditional) == query.count(): return True return False
[docs] def install(self): """ Method to install the blok """"Install the blok %r" %'Update installed blok') entry = self.registry.loaded_bloks[] entry.update(None) self.state = 'installed' self.installed_version = self.version
[docs] def upgrade(self): """ Method to update the blok """"Update the blok %r" %'Update installed blok') entry = self.registry.loaded_bloks[] entry.update(self.installed_version) self.state = 'installed' self.installed_version = self.version
[docs] def uninstall(self): """ Method to uninstall the blok """"Uninstall the blok %r" %'Update installed blok') entry = BlokManager.bloks[](self.registry) entry.uninstall() self.state = 'uninstalled' self.installed_version = None
[docs] def load(self): """ Method to load the blok when the registry is completly loaded """ name = blok_cls = BlokManager.get(name) if blok_cls is None: logger.warning("load(): class of Blok %r not found, " "Blok can't be loaded", name) return"Loading Blok %r", name) blok_cls(self.registry).load() logger.debug("Succesfully loaded Blok %r", name)
[docs] @classmethod def load_all(cls): """ Load all the installed bloks """ query = cls.query().filter(cls.state == 'installed') bloks = query.order_by(cls.order).all() if bloks: bloks.load()
@classmethod_cache() def is_installed(cls, blok_name): return cls.query().filter_by(name=blok_name, state='installed').count() != 0 @listen('Model.System.Blok', 'Update installed blok') def listen_update_installed_blok(cls): cls.registry.System.Cache.invalidate( cls.__registry_name__, 'is_installed')