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== Release series ==
A product series can have any number of releases associated with it.
These are created with the createProductRelease() method on
IMilestone.
>>> from zope.component import getUtility
>>> from lp.registry.interfaces.product import IProductSet
>>> productset = getUtility(IProductSet)
>>> firefox = productset['firefox']
>>> firefox_1_0 = firefox.getSeries('1.0')
>>> owner = firefox_1_0.owner
>>> login_person(owner)
>>> milestone = firefox_1_0.newMilestone('1.0.9')
>>> from datetime import datetime
>>> from pytz import UTC
>>> firefox_109 = milestone.createProductRelease(owner, datetime.now(UTC))
>>> from lp.registry.interfaces.productrelease import (
... IProductRelease)
>>> verifyObject(IProductRelease, firefox_109)
True
The driver for the release's milestone target cannot change the release, but
the driver of the milestone's series_target is a release manager and can
make changes.
>>> from lp.services.webapp.authorization import check_permission
>>> driver = factory.makePerson(name='driver')
>>> firefox_109.milestone.target.driver = driver
>>> release_manager = factory.makePerson(name='release-manager')
>>> firefox_109.milestone.series_target.driver = release_manager
>>> login_person(driver)
>>> check_permission('launchpad.Edit', firefox_109)
False
>>> login_person(release_manager)
>>> check_permission('launchpad.Edit', firefox_109)
True
A product release can be deleted using its destroySelf() method, as long
as it doesn't have any IProductReleaseFiles associated with it.
>>> login_person(owner)
>>> firefox_109.files.count()
0
>>> firefox_109.destroySelf()
>>> print firefox_1_0.getRelease('1.0.9')
None
If a product release has files associated with it, though, it can't be
deleted.
>>> milestone = firefox_1_0.newMilestone('1.0.10')
>>> firefox_1010 = milestone.createProductRelease(owner,
... datetime.now(UTC))
>>> firefox_1010.addReleaseFile('test', 'test', 'text/plain', owner)
<ProductReleaseFile...
>>> firefox_1010.destroySelf()
Traceback (most recent call last):
...
AssertionError:...
>>> firefox_1_0.getRelease('1.0.10')
<ProductRelease...
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