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plone.app.transmogrifier 1.3

Plone blueprints for collective.transmogrifier pipelines

This package contains several blueprints for collective.transmogrifier pipelines, commonly used to import content into a Plone site.

Installation

See docs/INSTALL.rst for installation instructions.

Credits

Development sponsored by
Elkjøp Nordic AS
Design and development
Martijn Pieters at Jarn Florian Schulze at Jarn

Detailed Documentation

ATSchema updater section

An AT schema updater pipeline section is another important transmogrifier content import pipeline element. It updates field values for Archetypes objects based on their schema based on the items it processes. The AT schema updater section blueprint name is plone.app.transmogrifier.atschemaupdater. AT Schema updater sections operate on objects already present in the ZODB, be they created by a constructor or pre-existing objects.

Schema updating needs at least 1 piece of information: the path to the object to update. To determine the path, the schema updater section inspects each item and looks for one key, as described below. Any item missing this piece of information will be skipped. Similarly, items with a path that doesn’t exist or are not Archetypes objects will be skipped as well.

For the object path, it’ll look (in order) for _plone.app.transmogrifier.atschemaupdater_[sectionname]_path, _plone.app.transmogrifier.atschemaupdater_path, _[sectionname]_path and _path, where [sectionname] is replaced with the name given to the current section. This allows you to target the right section precisely if needed. Alternatively, you can specify what key to use for the path by specifying the path-key option, which should be a list of keys to try (one key per line, use a re: or regexp: prefix to specify regular expressions).

Paths to objects are always interpreted as relative to the context. Any writable field who’s id matches a key in the current item will be updated with the corresponding value, using the field’s mutator.

>>> import pprint
>>> atschema = """
... [transmogrifier]
... pipeline =
...     schemasource
...     schemaupdater
...     printer
...
... [schemasource]
... blueprint = plone.app.transmogrifier.tests.schemasource
...
... [schemaupdater]
... blueprint = plone.app.transmogrifier.atschemaupdater
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.atschema', atschema)

>>> transmogrifier(u'plone.app.transmogrifier.tests.atschema')
>>> print handler
logger INFO
    {'_path': '/spam/eggs/foo',
   'fieldnotchanged': 'nochange',
   'fieldone': 'one value',
   'fieldtwo': 2,
   'fieldunicode': u'\xe5',
   'nosuchfield': 'ignored'}
logger INFO
    {'_path': 'not/existing/bar',
   'fieldone': 'one value',
   'title': 'Should not be updated, not an existing path'}
logger INFO
  {'fieldone': 'one value', 'title': 'Should not be updated, no path'}
logger INFO
    {'_path': '/spam/eggs/notatcontent',
   'fieldtwo': 2,
   'title': 'Should not be updated, not an AT base object'}
>>> pprint.pprint(plone.updated)
[('spam/eggs/foo', 'fieldone', 'one value-by-mutator'),
 ('spam/eggs/foo', 'fieldtwo', 2)]

Browser default section

A browser default pipeline section sets the default-page on a folder, and the layout template on content objects. They are the Transmogrifier equivalent of the display menu in Plone. The browser default section blueprint name is plone.app.transmogrifier.browserdefault. Browser default sections operate on objects already present in the ZODB, be they created by a constructor or pre-existing objects.

Setting the browser default needs at least 1 piece of information: the path to the object to modify. To determine the path, the browser default section inspects each item and looks for one key, as described below. Any item missing this piece of information will be skipped. Similarly, items with a path that doesn’t exist or do not support the Plone ISelectableBrowserDefault interface will be skipped as well.

For the object path, it’ll look (in order) for _plone.app.transmogrifier.browserdefault_[sectionname]_path, _plone.app.transmogrifier.browserdefault_path, _[sectionname]_path and _path, where [sectionname] is replaced with the name given to the current section. This allows you to target the right section precisely if needed. Alternatively, you can specify what key to use for the path by specifying the path-key option, which should be a list of keys to try (one key per line, use a re: or regexp: prefix to specify regular expressions).

Once an object has been located, the section will looks for defaultpage and layout keys. Like the path key, these can be specified in the source configuration, named by the default-page-key and layout-key options, respectively, and like the path key, the default keys the section looks for are the usual list of specific-to-generic keys based on blueprint and section names, from _plone.app.transmogrifier.browserdefault_[sectionname]_defaultpage and _plone.app.transmogrifier.browserdefault_[sectionname]_layout down to _defaultpage and _layout.

The defaultpage key will set the id of the default page that should be presented when the content object is loaded, and the layout key will set the id of the layout to use for the content item.

>>> import pprint
>>> browserdefault = """
... [transmogrifier]
... pipeline =
...     browserdefaultsource
...     browserdefault
...     printer
...
... [browserdefaultsource]
... blueprint = plone.app.transmogrifier.tests.browserdefaultsource
...
... [browserdefault]
... blueprint = plone.app.transmogrifier.browserdefault
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.browserdefault',
...                browserdefault)
>>> transmogrifier(u'plone.app.transmogrifier.tests.browserdefault')
>>> print(handler)
logger INFO
  {'_layout': 'spam', '_path': '/spam/eggs/foo'}
logger INFO
  {'_defaultpage': 'eggs', '_path': '/spam/eggs/bar'}
logger INFO
  {'_defaultpage': 'eggs', '_layout': 'spam', '_path': '/spam/eggs/baz'}
logger INFO
    {'_layout': 'spam',
   '_path': 'not/existing/bar',
   'title': 'Should not be updated, not an existing path'}
logger INFO
    {'_path': 'spam/eggs/incomplete',
   'title': 'Should not be updated, no layout or defaultpage'}
logger INFO
    {'_layout': '',
   '_path': 'spam/eggs/emptylayout',
   'title': 'Should not be updated, no layout or defaultpage'}
logger INFO
    {'_defaultpage': '',
   '_path': 'spam/eggs/emptydefaultpage',
   'title': 'Should not be updated, no layout or defaultpage'}
>>> pprint.pprint(plone.updated)
[('spam/eggs/foo', 'layout', 'spam'),
 ('spam/eggs/bar', 'defaultpage', 'eggs'),
 ('spam/eggs/baz', 'layout', 'spam'),
 ('spam/eggs/baz', 'defaultpage', 'eggs')]

Criterion adder section

A criterion adder section is used to add criteria to collections. It’s section blueprint name is plone.app.transmogrifier.criterionadder. Criterion adder sections operate on objects already present in the ZODB, be they created by a constructor or pre-existing objects.

Given a path, a criterion type and a field name, this section will look up a Collection at the given path, and add a criterion field, then alter the path of the item so further sections will act on the added criterion. For example, an item with keys _path=bar/baz, _field=modified and _criterion=ATFriendlyDateCriteria will result in a new date criterion added inside the bar/baz collection, and the item’s path will be updated to bar/baz/crit__ATFriendlyDateCriteria_modified.

For the path, criterion type and field keys, it’ll look (in order) for _plone.app.transmogrifier.atschemaupdater_[sectionname]_[key], _plone.app.transmogrifier.atschemaupdater_[key], _[sectionname]_[key] and _[key], where [sectionname] is replaced with the name given to the current section and [key] is path, criterion and field respectively. This allows you to target the right section precisely if needed. Alternatively, you can specify what key to use for these by specifying the path-key, criterion-key and field-key options, which should be a list of keys to try (one key per line, use a re: or regexp: prefix to specify regular expressions).

Paths to objects are always interpreted as relative to the context, and must resolve to IATTopic classes.

>>> import pprint
>>> criteria = """
... [transmogrifier]
... pipeline =
...     criteriasource
...     criterionadder
...     printer
...
... [criteriasource]
... blueprint = plone.app.transmogrifier.tests.criteriasource
...
... [criterionadder]
... blueprint = plone.app.transmogrifier.criterionadder
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.criteria', criteria)
>>> transmogrifier(u'plone.app.transmogrifier.tests.criteria')
>>> print(handler)
logger INFO
  {'_criterion': 'bar', '_field': 'baz', '_path': '/spam/eggs/foo/crit__baz_bar'}
logger INFO
    {'_criterion': 'bar',
   '_field': 'baz',
   '_path': 'not/existing/bar',
   'title': 'Should not be updated, not an existing path'}
logger INFO
    {'_path': 'spam/eggs/incomplete',
   'title': 'Should not be updated, no criterion or field'}
>>> pprint.pprint(plone.criteria)
[('spam/eggs/foo', 'baz', 'bar')]

PathFixer section

When importing contents from a old site into a new, the path to the Plone site root may have changed. This blueprint updates the old paths to match the new structrue by removing or appending strings from the right side of the path value.

Blueprint name: plone.app.transmogrifier.pathfixer

Option path-key: The key for the path to the object.

Option creation-key: The key for the creation date.

Option modification-key: The key for the modification date.

>>> import pprint
>>> pipeline = """
... [transmogrifier]
... pipeline =
...     schemasource
...     datesupdater
...     logger
...
... [schemasource]
... blueprint = plone.app.transmogrifier.tests.schemasource
...
... [datesupdater]
... blueprint = plone.app.transmogrifier.datesupdater
... path-key = _path
... creation-key = creation_date
... modification-key = modification_date
...
... [logger]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.datesupdater', pipeline)

>>> transmogrifier(u'plone.app.transmogrifier.tests.datesupdater')

Print out the source structure:

>>> print handler
logger INFO
    {'_path': '/spam/eggs/foo',
   'creation_date': DateTime('2010/10/10 00:00:00 GMT+2'),
   'modification_date': DateTime('2012/12/12 00:00:00 GMT+1')}
logger INFO
    {'_path': '/spam/eggs/bar',
   'creation_date': DateTime('2010/10/10 00:00:00 GMT+2')}
logger INFO
    {'_path': '/spam/eggs/baz',
   'modification_date': DateTime('2012/12/12 00:00:00 GMT+1')}
logger INFO
    {'_path': 'not/existing/bar',
   'creation_date': DateTime('2010/10/10 00:00:00 GMT+2'),
   'modification_date': DateTime('2012/12/12 00:00:00 GMT+1')}
logger INFO
    {'creation_date': DateTime('2010/10/10 00:00:00 GMT+2'),
   'modification_date': DateTime('2012/12/12 00:00:00 GMT+1')}

That was changed on the object:

>>> pprint.pprint(plone.updated)
[('spam/eggs/foo', 'creation_date', DateTime('2010/10/10 00:00:00 GMT+2')),
 ('spam/eggs/foo', 'modification_date', DateTime('2012/12/12 00:00:00 GMT+1')),
 ('spam/eggs/bar', 'creation_date', DateTime('2010/10/10 00:00:00 GMT+2')),
 ('spam/eggs/baz', 'modification_date', DateTime('2012/12/12 00:00:00 GMT+1'))]

Mime encapsulator section

A mime encapsulator section wraps arbitrary data in OFS.Image.File objects, together with a MIME type. This wrapping is a pre-requisite for Archetypes image, file or text fields, which can only take such File objects. The mime encapsulator blueprint name is plone.app.transmogrifier.mimeencapsulator.

An encapsulator section needs 3 pieces of information: the key at which to find the data to encapsulate, the MIME type of this data, and the name of the field where the encapsulated data will be stored. The idea is that the data is copied from a “data key” (defaulting to _data and settable with the data-key option), wrapped into a File object with a MIME type (read from the mimetype option, which contains a TALES expression), and then saved into the pipeline item dictionary under a new key, most likely corresponding to an Archetypes field name (read from the field option, which is also a TALES expression).

The data key defaults to the series _[blueprintname]_[sectionname]_data, _[blueprintname]_data, _[sectionname]_data and _data, where [blueprintname] is plone.app.transmogrifier.mimeencapsulator and [sectionname] is replaced with the name of the current section. You can override this by specifying the data-key option.

You specify the mimetype with the mimetype option, which takes a TALES expression.

The field option, also a TALES expression, sets the output field name.

Optionally, you can specify a condition option, again a TALES expression, that when evaluating to False, causes the section to skip encapsulation for that item.

>>> encapsulator = """
... [transmogrifier]
... pipeline =
...     source
...     encapsulator
...     conditionalencapsulator
...     printer
...
... [source]
... blueprint = plone.app.transmogrifier.tests.encapsulatorsource
...
... [encapsulator]
... blueprint = plone.app.transmogrifier.mimeencapsulator
... # Read the mimetype from the item
... mimetype = item/_mimetype
... field = string:datafield
...
... [conditionalencapsulator]
... blueprint = plone.app.transmogrifier.mimeencapsulator
... data-key = portrait
... mimetype = python:item.get('_%s_mimetype' % key)
... # replace the data in-place
... field = key
... condition = mimetype
...
... [printer]
... blueprint = plone.app.transmogrifier.tests.ofsfileprinter
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.encapsulator',
...                encapsulator)
>>> transmogrifier(u'plone.app.transmogrifier.tests.encapsulator')
datafield: (application/x-test-data) foobarbaz
portrait: (image/jpeg) someportraitdata

The field expression has access to the following:

item
The current pipeline item
key
The name of the matched data key
match
If the key was matched by a regular expression, the match object, otherwise boolean True
transmogrifier
The transmogrifier
name
The name of the splitter section
options
The splitter options
modules
sys.modules

The mimetype expression has access to the same information as the field expression, plus:

field
The name of the field in which the encapsulated data will be stored.

The condition expression has access to the same information as the mimetype expression, plus:

mimetype
The mimetype used to encapsulate the data.

PathFixer section

When importing contents from a old site into a new, the path to the Plone site root may have changed. This blueprint updates the old paths to match the new structrue by removing or appending strings from the right side of the path value.

Blueprint name: plone.app.transmogrifier.pathfixer

Option path-key: The key of the item under which the path to be manipulated can
be found. E.g. _path.

Option stripstring: A string to strip from the path value.

Option prependstring: A string to append to the path value.

Look, here. Original path structure from plone.app.transmogrifier.tests.schemasource is:

/spam/eggs/foo
relative/path
/spam/eggs/another

Now lets manipulate it:

>>> import pprint
>>> pipeline = """
... [transmogrifier]
... pipeline =
...     schemasource
...     pathfixer
...     logger
...
... [schemasource]
... blueprint = plone.app.transmogrifier.tests.schemasource
...
... [pathfixer]
... blueprint = plone.app.transmogrifier.pathfixer
... path-key = _path
... stripstring = /spam/eggs/
... prependstring = subfolder/
...
... [logger]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... key = _path
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.pathfixer', pipeline)

>>> transmogrifier(u'plone.app.transmogrifier.tests.pathfixer')
>>> print handler
logger INFO
  subfolder/foo
logger INFO
  subfolder/relative/path
logger INFO
  subfolder/another

Portal Transforms section

A portal transforms pipeline section lets you use Portal Transforms to transform item values. The portal transforms section blueprint name is plone.app.transmogrifier.portaltransforms.

What values to transform is determined by the keys option, which takes a set of newline-separated key names. If a key name starts with re: or regexp: it is treated as a regular expression instead.

You can specify what transformation to apply in two ways. Firstly, you can directly specify a transformation by naming it with the transform option; the named transformation is run directly. Alternatively you can let the portal transforms tool figure out what transform to use by specifying target and an optional from mimetype. The portal transforms tool will select one or more transforms based on these mimetypes, and if no from option is given the original item value is used to determine one.

Also optional is the condition option, which lets you specify a TALES expression that when evaluating to False will prevent any transformations from happening. The condition is evaluated for every matched key.

>>> ptransforms = """
... [transmogrifier]
... pipeline =
...     source
...     transform-id
...     transform-title
...     transform-status
...     printer
...
... [source]
... blueprint = collective.transmogrifier.sections.tests.samplesource
... encoding = utf8
...
... [transform-id]
... blueprint = plone.app.transmogrifier.portaltransforms
... transform = identity
... keys = id
...
... [transform-title]
... blueprint = plone.app.transmogrifier.portaltransforms
... target = text/plain
... keys = title
...
... [transform-status]
... blueprint = plone.app.transmogrifier.portaltransforms
... from = text/plain
... target = text/plain
... keys = status
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.ptransforms',
...                ptransforms)

>>> transmogrifier(u'plone.app.transmogrifier.tests.ptransforms')
>>> print handler
logger INFO
    {'id': "Transformed 'foo' using the identity transform",
   'status': "Transformed '\\xe2\\x84\\x97' from text/plain to text/plain",
   'title': "Transformed 'The Foo Fighters \\xe2\\x84\\x97' to text/plain"}
logger INFO
    {'id': "Transformed 'bar' using the identity transform",
   'status': "Transformed '\\xe2\\x84\\xa2' from text/plain to text/plain",
   'title': "Transformed 'Brand Chocolate Bar \\xe2\\x84\\xa2' to text/plain"}
logger INFO
    {'id': "Transformed 'monty-python' using the identity transform",
   'status': "Transformed '\\xc2\\xa9' from text/plain to text/plain",
   'title': 'Transformed "Monty Python\'s Flying Circus \\xc2\\xa9" to text/plain'}

The condition expression has access to the following:

item
The current pipeline item
key
The name of the matched key
match
If the key was matched by a regular expression, the match object, otherwise boolean True
transmogrifier
The transmogrifier
name
The name of the splitter section
options
The splitter options
modules
sys.modules

Redirector section

A redirector section uses plone.app.redirector to manage redirects and update paths in keys.

>>> import pprint
>>> redirector = """
... [transmogrifier]
... pipeline =
...     source
...     clean-old-paths
...     old-paths
...     content-element
...     redirect
...     href
...     logger
...
... [source]
... blueprint = collective.transmogrifier.sections.csvsource
... filename = plone.app.transmogrifier:redirector.csv
...
... [clean-old-paths]
... blueprint = collective.transmogrifier.sections.manipulator
... condition = not:item/_old_paths|nothing
... delete = _old_paths
...
... [old-paths]
... blueprint = collective.transmogrifier.sections.inserter
... key = string:_old_paths
... condition = exists:item/_old_paths
... value = python:item['_old_paths'].split('|')
...
... [content-element]
... blueprint = collective.transmogrifier.sections.inserter
... key = string:_content_element
... condition = item/remoteUrl
... value = python:modules['xml.etree.ElementTree'].Element(\
...     'a', dict(href=item['remoteUrl']))
...
... [redirect]
... blueprint = plone.app.transmogrifier.redirector
...
... [href]
... blueprint = collective.transmogrifier.sections.inserter
... key = string:_content_element
... condition = exists:item/_content_element
... value = python:item['_content_element'].attrib['href']
...
... [logger]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... level = INFO
... """
>>> registerConfig(
...     u'plone.app.transmogrifier.tests.redirector', redirector)

>>> transmogrifier(u'plone.app.transmogrifier.tests.redirector')
>>> print handler
logger INFO
  {'_old_paths': ['corge', 'waldo'], '_redirect_path': 'foo', 'remoteUrl': ''}
logger INFO
  {'_redirect_path': 'foo', 'remoteUrl': ''}
logger INFO
    {'_old_paths': ['corge/item-00', 'waldo/item-00'],
   '_redirect_path': 'foo/item-00',
   'remoteUrl': ''}
logger INFO
    {'_content_element': 'foo/item-00',
   '_old_paths': ['corge/grault', 'waldo/fred'],
   '_redirect_path': 'foo/bar',
   'remoteUrl': 'foo/item-00'}
logger INFO
    {'_content_element': '/foo/item-00#fragment',
   '_old_paths': ['corge/grault/item-01', 'waldo/fred/item-01'],
   '_redirect_path': 'http://nohost/foo/bar/item-01',
   'remoteUrl': '/foo/item-00#fragment'}
logger INFO
  {'_redirect_path': '/foo/bar/qux', 'remoteUrl': ''}
logger INFO
    {'_content_element': 'http://nohost/foo/bar/item-01',
   '_redirect_path': '/foo/bar/qux/item-02',
   'remoteUrl': 'http://nohost/foo/bar/item-01'}

>>> import pprint
>>> from zope.component import getUtility
>>> from plone.app.redirector.interfaces import IRedirectionStorage
>>> storage = getUtility(IRedirectionStorage)
>>> pprint.pprint(dict((path, storage.get(path)) for path in storage))
{'/plone/corge': '/plone/foo',
 '/plone/corge/grault': '/plone/foo/bar',
 '/plone/corge/grault/item-01': 'http://nohost/foo/bar/item-01',
 '/plone/corge/item-00': '/plone/foo/item-00',
 '/plone/waldo': '/plone/foo',
 '/plone/waldo/fred': '/plone/foo/bar',
 '/plone/waldo/fred/item-01': 'http://nohost/foo/bar/item-01',
 '/plone/waldo/item-00': '/plone/foo/item-00'}

Indexing section

A ReindexObject section allows you to reindex an existing object in the portal_catalog. ReindexObject sections operate on objects already present in the ZODB, be they created by a constructor or pre-existing objects.

The ReindexObject blueprint name is plone.app.transmogrifier.reindexobject.

To determine the path, the ReindexObject section inspects each item and looks for a path key, as described below. Any item missing this key will be skipped. Similarly, items with a path that doesn’t exist or are not referenceable (Archetypes) or do not inherit from CMFCatalogAware will be skipped as well.

The object path will be found under the first key found among the following:

  • _plone.app.transmogrifier.reindexobject_[sectionname]_path
  • _plone.app.transmogrifier.reindexobject_path
  • _[sectionname]_path
  • _path

where [sectionname] is replaced with the name given to the current section. This allows you to target the right section precisely if needed.

Alternatively, you can specify what key to use for the path by specifying the path-key option, which should be a list of keys to try (one key per line; use a re: or regexp: prefix to specify regular expressions).

Paths to objects are always interpreted as relative to the context.

>>> import pprint
>>> reindexobject = """
... [transmogrifier]
... pipeline =
...     reindexobjectsource
...     reindexobject
...     printer
...
... [reindexobjectsource]
... blueprint = plone.app.transmogrifier.tests.reindexobjectsource
...
... [reindexobject]
... blueprint = plone.app.transmogrifier.reindexobject
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.reindexobject', reindexobject)

>>> transmogrifier(u'plone.app.transmogrifier.tests.reindexobject')
>>> print(handler)
logger INFO
  {'_path': '/spam/eggs/foo'}
logger INFO
  {'_path': '/spam/eggs/bar'}
logger INFO
  {'_path': '/spam/eggs/baz'}
logger INFO
    {'_path': 'not/a/catalog/aware/content',
   'title': 'Should not be reindexed, not a CMFCatalogAware content'}
logger INFO
    {'_path': 'not/existing/bar',
   'title': 'Should not be reindexed, not an existing path'}

>>> pprint.pprint(plone.reindexed)
[('spam/eggs/foo', 'reindexed'),
 ('spam/eggs/bar', 'reindexed'),
 ('spam/eggs/baz', 'reindexed')]

UID updater section

If an Archetypes content object is created in a pipeline, e.g. by the standard content constructor section, it will get a new UID. If you are importing content from another Plone site, and you have references (or links embedded in content using Plone’s link-by-UID feature) to existing content, you may want to retain UIDs. The UID updater section allows you to set the UID on an existing object for this purpose.

The UID updater blueprint name is plone.app.transmogrifier.uidupdater.

UID updating requires two pieces of information: the path to the object to update, and the new UID to set.

To determine the path, the UID updater section inspects each item and looks for a path key, as described below. Any item missing this key will be skipped. Similarly, items with a path that doesn’t exist or are not referenceable (Archetypes) objects will be skipped.

The object path will be found under the first key found among the following:

  • _plone.app.transmogrifier.atschemaupdater_[sectionname]_path
  • _plone.app.transmogrifier.atschemaupdater_path
  • _[sectionname]_path
  • _path

where [sectionname] is replaced with the name given to the current section. This allows you to target the right section precisely if needed.

Alternatively, you can specify what key to use for the path by specifying the path-key option, which should be a list of keys to try (one key per line; use a re: or regexp: prefix to specify regular expressions).

Paths to objects are always interpreted as relative to the context.

Similarly, the UID to set must be a string under a given key. You can set the key with the uid-key option, which behaves much like path-key. The default is to look under:

  • _plone.app.transmogrifier.atschemaupdater_[sectionname]_uid
  • _plone.app.transmogrifier.atschemaupdater_uid
  • _[sectionname]_uid
  • _uid

If the UID key is missing, the item will be skipped.

Below is an example of a standard updater. The test uid source produces items with two keys: a path under _path and a UID string under _uid.

>>> import pprint
>>> atschema = """
... [transmogrifier]
... pipeline =
...     schemasource
...     schemaupdater
...     printer
...
... [schemasource]
... blueprint = plone.app.transmogrifier.tests.uidsource
...
... [schemaupdater]
... blueprint = plone.app.transmogrifier.uidupdater
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.uid', atschema)
>>> transmogrifier(u'plone.app.transmogrifier.tests.uid')
>>> print(handler)
logger INFO
  {'_path': '/spam/eggs/foo', '_uid': 'abc'}
logger INFO
  {'_path': '/spam/eggs/bar', '_uid': 'xyz'}
logger INFO
  {'_path': 'not/existing/bar', '_uid': 'def'}
logger INFO
  {'_uid': 'geh'}
logger INFO
  {'_path': '/spam/eggs/baz'}
logger INFO
  {'_path': '/spam/notatcontent', '_uid': 'ijk'}

>>> pprint.pprint(plone.uids_set)
[('spam/eggs/foo', 'abc')]

URL Normalizer section

A URLNormalizer section allows you to parse any piece of text into a url-safe string which is then assigned to a specified key. It uses plone.i18n.normalizer to perform the normalization. The url normalizer section blueprint name is plone.app.transmogrifier.urlnormalizer.

The URL normalizer accepts the following optional keys - source-key: The name of the object key that you wish to normalize, destination-key: Where you want the normalized string to be stored, locale: if you want the normalizer to be aware of locale, use this.

>>> import pprint
>>> urlnormalizer = """
... [transmogrifier]
... pipeline =
...     urlnormalizersource
...     urlnormalizer
...     printer
...
... [urlnormalizersource]
... blueprint = plone.app.transmogrifier.tests.urlnormalizersource
...
... [urlnormalizer]
... blueprint = plone.app.transmogrifier.urlnormalizer
... source-key = title
... destination-key = string:id
... locale = string:en
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.urlnormalizer',
...                urlnormalizer)
>>> transmogrifier(u'plone.app.transmogrifier.tests.urlnormalizer')
>>> print(handler)
logger INFO
  {'id': 'mytitle', 'title': 'mytitle'}
logger INFO
  {'id': 'is-this-a-title-of-any-sort', 'title': 'Is this a title of any sort?'}
logger INFO
    {'id': 'put-some-br-1lly-v4lues-here-there',
   'title': 'Put some <br /> $1llY V4LUES -- here&there'}
logger INFO
    {'id': 'what-about-line-breaks-system',
   'title': 'What about \r\n line breaks (system)'}
logger INFO
  {'id': 'try-one-of-these-oh', 'title': 'Try one of these --------- oh'}
logger INFO
  {'language': 'My language is de'}
logger INFO
  {'language': 'my language is en'}

As you can see, only items containing the specified source-key have been processed, the others have been ignored and yielded without change.

Destination-key and locale accept TALES expressions, so for example you could set your destination-key based on your locale element, which is in turn derived from your source-key:

>>> import pprint
>>> urlnormalizer = """
... [transmogrifier]
... pipeline =
...     urlnormalizersource
...     urlnormalizer
...     printer
...
... [urlnormalizersource]
... blueprint = plone.app.transmogrifier.tests.urlnormalizersource
...
... [urlnormalizer]
... blueprint = plone.app.transmogrifier.urlnormalizer
... source-key = language
... locale = python:str(item.get('${urlnormalizer:source-key}', 'na')[-2:])
... destination-key = ${urlnormalizer:locale}
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.urlnormalizer2',
...                urlnormalizer)

>>> handler.clear()
>>> transmogrifier(u'plone.app.transmogrifier.tests.urlnormalizer2')
>>> print(handler)
logger INFO
  {'title': 'mytitle'}
logger INFO
  {'title': 'Is this a title of any sort?'}
logger INFO
  {'title': 'Put some <br /> $1llY V4LUES -- here&there'}
logger INFO
  {'title': 'What about \r\n line breaks (system)'}
logger INFO
  {'title': 'Try one of these --------- oh'}
logger INFO
  {'de': 'my-language-is-de', 'language': 'My language is de'}
logger INFO
  {'en': 'my-language-is-en', 'language': 'my language is en'}

In this case only items containing the ‘language’ key have been processed, and the destination-key has been set to the same value as the locale was. This is more to illuminate the fact that the locale was set, rather than providing a sensible use-case for destination-key.

If ZERO options are specified, the normalizer falls back to a set of default values as follows: source-key: title, locale: en, destination-key: _id

>>> import pprint
>>> urlnormalizer = """
... [transmogrifier]
... pipeline =
...     urlnormalizersource
...     urlnormalizer
...     printer
...
... [urlnormalizersource]
... blueprint = plone.app.transmogrifier.tests.urlnormalizersource
...
... [urlnormalizer]
... blueprint = plone.app.transmogrifier.urlnormalizer
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.urlnormalizer3',
...                urlnormalizer)

>>> handler.clear()
>>> transmogrifier(u'plone.app.transmogrifier.tests.urlnormalizer3')
>>> print(handler)
logger INFO
  {'_id': 'mytitle', 'title': 'mytitle'}
logger INFO
  {'_id': 'is-this-a-title-of-any-sort', 'title': 'Is this a title of any sort?'}
logger INFO
    {'_id': 'put-some-br-1lly-v4lues-here-there',
   'title': 'Put some <br /> $1llY V4LUES -- here&there'}
logger INFO
    {'_id': 'what-about-line-breaks-system',
   'title': 'What about \r\n line breaks (system)'}
logger INFO
  {'_id': 'try-one-of-these-oh', 'title': 'Try one of these --------- oh'}
logger INFO
  {'language': 'My language is de'}
logger INFO
  {'language': 'my language is en'}

In this case, the destination-key is set to a controller variable, like _path, as it is expected that the newly formed Id will in most cases be used further down the pipeline in constructing the full, final path to the new Plone object.

It should be noted that this section can effectively transform any section of text and turn it into a normalized, web safe string (max 255 chars) This string does not necessarily need to be used for a URL.

Disable / enable versioning sections

It can be helpful to disable versioning during content construction to avoid storing incomplete versions in the content item’s revision history.

For example:

[transmogrifier]
pipeline =
    schemasource
    disable_versioning
    constructor
    enable_versioning
    schemaupdater

[disable_versioning]
blueprint = plone.app.transmogrifier.versioning.disable

[constructor]
blueprint = collective.transmogrifier.sections.constructor

[enable_versioning]
blueprint = plone.app.transmogrifier.versioning.enable

Workflow updater section

A workflow updater pipeline section is another important transmogrifier content import pipeline element. It executes workflow transitions on Plone content based on the items it processes. The workflow updater section blueprint name is plone.app.transmogrifier.workflowupdater. Workflow updater sections operate on objects already present in the ZODB, be they created by a constructor or pre-existing objects.

Workflow updating needs 2 pieces of information: the path to the object, and what transitions to execute. To determine these, the workflow updater section inspects each item and looks for two keys, as described below. Any item missing any of these two pieces will be skipped. Similarly, items with a path that doesn’t exist will be skipped as well.

For the object path, it’ll look (in order) for _plone.app.transmogrifier.atschemaupdater_[sectionname]_path, _plone.app.transmogrifier.atschemaupdater_path, _[sectionname]_path and _path, where [sectionname] is replaced with the name given to the current section. This allows you to target the right section precisely if needed. Alternatively, you can specify what key to use for the path by specifying the path-key option, which should be a list of keys to try (one key per line, use a re: or regexp: prefix to specify regular expressions).

For the transitions, use the transitions-key option (same interpretation as path-key), defaulting to _plone.app.transmogrifier.atschemaupdater_[sectionname]_transitions, _plone.app.transmogrifier.atschemaupdater_transitions, _[sectionname]_transitions and _transitions.

Unicode paths are encoded to ASCII. Paths to objects are always interpreted as relative to the context object. Transitions are specified as a sequence of transition names, or as a string specifying one transition, or a list of dictionaries containing ‘action’ as transition id, ‘review_state’ as state id and ‘time’ as a DateTime representing the transition time (if so, the worflow history will be updated with the provided date). Transitions are executed in order, failing transitions are silently ignored.

>>> import pprint
>>> workflow = """
... [transmogrifier]
... pipeline =
...     workflowsource
...     workflowupdater
...     printer
...
... [workflowsource]
... blueprint = plone.app.transmogrifier.tests.workflowsource
...
... [workflowupdater]
... blueprint = plone.app.transmogrifier.workflowupdater
...
... [printer]
... blueprint = collective.transmogrifier.sections.logger
... name = logger
... """
>>> registerConfig(u'plone.app.transmogrifier.tests.workflow',
...                workflow)
>>> transmogrifier(u'plone.app.transmogrifier.tests.workflow')
>>> print(handler)
logger INFO
  {'_path': '/spam/eggs/foo', '_transitions': 'spam'}
logger INFO
  {'_path': '/spam/eggs/baz', '_transitions': ('spam', 'eggs')}
logger INFO
    {'_path': 'not/existing/bar',
   '_transitions': ('spam', 'eggs'),
   'title': 'Should not be updated, not an existing path'}
logger INFO
    {'_path': 'spam/eggs/incomplete',
   'title': 'Should not be updated, no transitions'}
logger INFO
    {'_path': '/spam/eggs/nosuchtransition',
   '_transitions': ('nonsuch',),
   'title': 'Should not be updated, no such transition'}
logger INFO
    {'_path': '/spam/eggs/bla',
   '_transitions': ({'action': 'spam',
                     'review_state': 'spammed',
                     'time': DateTime('2014/06/20 00:00:00 GMT+0')},)}

>>> pprint.pprint(plone.updated)
[('spam/eggs/foo', 'spam'),
 ('spam/eggs/baz', 'spam'),
 ('spam/eggs/baz', 'eggs'),
 ('spam/eggs/bla', 'spam')]

Changelog

1.3 (2015-01-22)

  • Ignore if workflow_history is not available on objects when running the workflowupdater blueprint. [thet]
  • Add datesupdater section to set creation_date and modification_date on objects. [thet]
  • Add pathfixer section to remove/prepend parts of the path. [thet]
  • PEP 8. [thet]
  • Fix uidsection for dexterity. [shylux]
  • Allow to import transition date in the worflow history [ebrehault]
  • Fix field accessor and mutator for updating schemaextended field values with schemaupdater. In some cases when using fields extended by schemaextender it defines an accessor attribute which is not accessable. To cover all fields, its better to access and mutate over the getAccessor and getMutator methods on archetype fields. [elioschmutz]
  • Add a section to manage plone.app.redirector and to use it to update paths. [rpatterson]
  • Support field accessor and mutator for updating field values with schemaupdater. [phgross]

1.2 (2011-05-23)

  • Sections to disable and enable versioning within the pipeline. [elro]
  • Convert paths to strings. [elro]
  • Add a ‘verbose’ option to reindexobject blueprint that logs the object currently reindexed and number of objects reindexed. [thomasdesvenain]
  • Check for CatalogAware base class when reindexing an object instead of CMFCatalogAware because in Plone 4 folders do not inherit from CMFCatalogAware. [buchi]

1.1 (2010-03-30)

  • Added Indexing section. See reindexobject.rst. [sylvainb]
  • Added UID updated section. See uidupdater.rst. [optilude]
  • Fixed tests for Plone 4, in the same way that they were fixed in collective.transmogrifier. [optilude]

1.0 (2009-08-09)

  • Initial package. [mj]
 
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