ftw.upgrade 1.5

Compatibility

Plone 4.1

Plone 4.2

Plone 4.3

Updating objects with progress logging

Since an upgrade step often updates a set of objects indexed in the catalog, there is a useful helper method combining querying the catalog with the ProgressLogger (see below). The catalog is queried unrestricted so that we handle all the objects.

Here is an example for updating all objects of a particular type:

from ftw.upgrade import ProgressLogger
from ftw.upgrade import UpgradeStep

class ExcludeFilesFromNavigation(UpgradeStep):

   def __call__(self):
       for obj in self.objects({'portal_type': 'File'},
                               'Enable exclude from navigation for files'):
           obj.setExcludeFromNav(True)

When running the upgrade step you’ll have a progress log:

INFO ftw.upgrade STARTING Enable exclude from navigation for files
INFO ftw.upgrade 1 of 10 (10%): Enable exclude from navigation for files
INFO ftw.upgrade 5 of 50 (50%): Enable exclude from navigation for files
INFO ftw.upgrade 10 of 10 (100%): Enable exclude from navigation for files
INFO ftw.upgrade DONE: Enable exclude from navigation for files

Methods

The UpgradeStep class has various helper functions:

self.getToolByName(tool_name)

Returns the tool with the name tool_name of the upgraded site.

self.objects(catalog_query, message, logger=None)

Queries the catalog (unrestricted) and an iterator with full objects. The iterator configures and calls a ProgressLogger with the passed message.

self.catalog_rebuild_index(name)

Reindex the portal_catalog index identified by name.

self.catalog_reindex_objects(query, idxs=None)

Reindex all objects found in the catalog with query. A list of indexes can be passed as idxs for limiting the indexed indexes.

self.catalog_has_index(name)

Returns whether there is a catalog index name.

self.catalog_add_index(name, type_, extra=None)

Adds a new index to the portal_catalog tool.

self.catalog_remove_index(name)

Removes an index to from portal_catalog tool.

self.actions_remove_action(category, action_id)

Removes an action identified by action_id from the portal_actions tool from a particulary category.

self.catalog_unrestricted_get_object(brain)

Returns the unrestricted object of a brain.

self.catalog_unrestricted_search(query, full_objects=False)

Searches the catalog without checking security. When full_objects is True, unrestricted objects are returned instead of brains. Upgrade steps should generally use unrestricted catalog access since all objects should be upgraded - even if the manager running the upgrades has no access on the objects.

self.actions_remove_type_action(portal_type, action_id)

Removes a portal_types action from the type identified by portal_type with the action id action_id.

self.set_property(context, key, value, data_type='string')

Set a property with the key value and the value value on the context safely. The property is created with the type data_type if it does not exist.

self.add_lines_to_property(context, key, lines)

Updates a property with key key on the object context adding lines. The property is expected to by of type “lines”. If the property does not exist it is created.

self.setup_install_profile(profileid, steps=None)

Installs the generic setup profile identified by profileid. If a list step names is passed with steps (e.g. [‘actions’]), only those steps are installed. All steps are installed by default.

self.migrate_class(obj, new_class)

Changes the class of an object. It has a special handling for BTreeFolder2Base based containers.

self.remove_broken_browserlayer(name, dottedname)

Removes a browser layer registration whose interface can’t be imported any more from the persistent registry. Messages like these on instance boot time can be an indication for this problem: WARNING OFS.Uninstalled Could not import class 'IMyProductSpecific' from module 'my.product.interfaces'

self.update_security(obj, reindex_security=True)

Update the security of a single object (checkboxes in manage_access). This is usefuly in combination with the ProgressLogger. It is possible to not reindex the object security in the catalog (allowedRolesAndUsers). This speeds up the update but should only be disabled when there are no changes for the View permission.

Progress logger

When an upgrade step is taking a long time to complete (e.g. while performing a data migration), the administrator needs to have information about the progress of the update. It is also important to have continuous output for avoiding proxy timeouts when accessing Zope through a webserver / proxy.

With the ProgressLogger it is very easy to log the progress:

from ftw.upgrade import ProgressLogger
from ftw.upgrade import UpgradeStep

class MyUpgrade(UpgradeStep):

   def __call__(self):
       objects = self.catalog_unrestricted_search(
           {'portal_type': 'MyType'}, full_objects=True)

       for obj in ProgressLogger('Migrate my type', objects):
           self.upgrade_obj(obj)

   def upgrade_obj(self, obj):
       do_something_with(obj)

The logger will log the current progress every 5 seconds (default). Example log output:

INFO ftw.upgrade STARTING Migrate MyType
INFO ftw.upgrade 1 of 10 (10%): Migrate MyType
INFO ftw.upgrade 5 of 50 (50%): Migrate MyType
INFO ftw.upgrade 10 of 10 (100%): Migrate MyType
INFO ftw.upgrade DONE: Migrate MyType

Workflow Chain Updater

When the workflow is changed for a content type, the workflow state is reset to the init state of new workflow for every existing object of this type. This can be really annoying.

The WorkflowChainUpdater takes care of setting every object to the right state after changing the chain (the workflow for the type):

from ftw.upgrade.workflow import WorkflowChainUpdater
from ftw.upgrade import UpgradeStep

class UpdateWorkflowChains(UpgradeStep):

    def __call__(self):
        query = {'portal_type': ['Document', 'Folder']}
        objects = self.catalog_unrestricted_search(
            query, full_objects=True)

        review_state_mapping={
            ('intranet_workflow', 'plone_workflow'): {
                'external': 'published',
                'pending': 'pending'}})

        with WorkflowChainUpdater(objects, review_state_mapping):
            # assume that the profile 1002 does install a new workflow
            # chain for Document and Folder.
            self.setup_install_profile('profile-my.package.upgrades:1002')

Placeful Workflow Policy Activator

When manually activating a placeful workflow policy all objects with a new workflow might be reset to the initial state of the new workflow.

ftw.upgrade has a tool for enabling placeful workflow policies without breaking the review state by mapping it from the old to the new workflows:

from ftw.upgrade.placefulworkflow import PlacefulWorkflowPolicyActivator
from ftw.upgrade import UpgradeStep

class ActivatePlacefulWorkflowPolicy(UpgradeStep):

    def __call__(self):
        portal_url = self.getToolByName('portal_url')
        portal = portal_url.getPortalObject()

        context = portal.unrestrictedTraverse('path/to/object')

        activator = PlacefulWorkflowPolicyActivator(context)
        activator.activate_policy(
            'local_policy',
            review_state_mapping={
                ('intranet_workflow', 'plone_workflow'): {
                    'external': 'published',
                    'pending': 'pending'}})

The above example activates a placeful workflow policy recursively on the object under “path/to/object”, enabling the placeful workflow policy “local_policy”.

The mapping then maps the “intranet_workflow” to the “plone_workflow” by defining which old states (key, intranet_workflow) should be changed to the new states (value, plone_workflow).

Options

• activate_in: Activates the placeful workflow policy for the passed in object (True by default).

• activate_below: Activates the placeful workflow policy for the children of the passed in object, recursively (True by default).

• update_security: Update object security and reindex allowedRolesAndUsers (True by default).

1.5 (2013-08-16)

• Add a WorkflowChainUpdater for changing workflow chains without resetting existing objects to the initial review state of the new workflow. [jone]

1.4.0 (2013-07-18)

• Added helper for adding a type_action. [phgross]

• Add objects method to UpgradeStep for easy querying the catalog and doing stuff with progress logging combined. [jone]

• Make ProgressLogger an iterator too, because it is easier to use. [jone]

• Improve logging while installing upgrade steps. Show duration for installing. [jone]

• Fix upgrade step icons for Plone 4.3. [jone]

• Add update_security helper. [jone]

• Fix incomplete status info entry prodcued by placeful workflow policy activator. [jone]

1.3 (2013-06-13)

• Implement a placeful workflow policy activator. [jone]

• Added remove_broken_browserlayer method to step class. [lgraf]

1.2.1 (2013-04-23)

• Keep modification date on reindexObject wihtout idxs. [mathias.leimgruber]

1.2 (2013-01-24)

• onegov.ch approved: add badge to readme. [jone]

• Remove ‘step’ and ‘for’ values from internal data structure. This is needed for allowing us to serialize the data (json). [jone]

• Add IPostUpgrade adapter hook. [jone]

• Refactor dependency sorting into seperate function. [jone]

• Add security declarations. [jone]

• Fix wrong tool usage when installing a profile in step class. [jone]

1.1 (2012-10-08)

• Add catalog_unrestricted_get_object and catalog_unrestricted_search methods to step class. [jone]

• Handle profiles of packages which were removed but have leftover generic setup entries. [jone]

1.0 (2012-08-13)

• Add installed upgrades to transaction note. Closes #7 [jone]

• Add migrate_class helper with _p_changed implementation supporting BTreeFolder2Base containers. [jone]

• Remove purge_resource_registries() helper because it does not behave as expected. [jone]

• Set min-height of upgrade output frame to 500px. [jone]

• Print exceptions to browser log stream. [jone]

1.0b2 (2012-07-04)

• Fix the upgrade registration problem (using a classmethod does not work since registration fails). [jone]

• Let @@manage-upgrade be usable without actually installing the GS profile. [maethu]

1.0b1 (2012-06-27)

• First implementation. [jone]