Commit a432f191 authored by Jason Madden's avatar Jason Madden

Expose PersistentList/Mapping docs. Fixes #52.

parent c6be5f8f
...@@ -5,6 +5,7 @@ ...@@ -5,6 +5,7 @@
:maxdepth: 2 :maxdepth: 2
api/interfaces api/interfaces
api/collections
api/attributes api/attributes
api/pickling api/pickling
api/cache api/cache
========================
Persistent Collections
========================
The ``persistent`` package provides two simple collections that are
persistent and keep track of when they are mutated in place.
.. autoclass:: persistent.mapping.PersistentMapping
:members:
:show-inheritance:
.. autoclass:: persistent.list.PersistentList
:members:
:show-inheritance:
...@@ -15,3 +15,12 @@ ...@@ -15,3 +15,12 @@
:members: :members:
:member-order: bysource :member-order: bysource
Implementations
===============
This package provides one implementation of :class:`IPersistent` that
should be extended.
.. autoclass:: persistent.Persistent
:members:
:show-inheritance:
...@@ -50,16 +50,16 @@ master_doc = 'index' ...@@ -50,16 +50,16 @@ master_doc = 'index'
# General information about the project. # General information about the project.
project = u'persistent' project = u'persistent'
copyright = u'2011, ZODB Developers <zope-dev@zope.org>' copyright = u'2011,2016 ZODB Developers <zope-dev@zope.org>'
# The version info for the project you're documenting, acts as replacement for # The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the # |version| and |release|, also used in various other places throughout the
# built documents. # built documents.
# #
# The short X.Y version. # The short X.Y version.
version = '3.10' version = '4.2'
# The full version, including alpha/beta/rc tags. # The full version, including alpha/beta/rc tags.
release = '3.10b1' release = '4.2.2'
# The language for content autogenerated by Sphinx. Refer to documentation # The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages. # for a list of supported languages.
...@@ -266,4 +266,4 @@ epub_copyright = u'2011, ZODB Developers <zope-dev@zope.org>' ...@@ -266,4 +266,4 @@ epub_copyright = u'2011, ZODB Developers <zope-dev@zope.org>'
# Example configuration for intersphinx: refer to the Python standard library. # Example configuration for intersphinx: refer to the Python standard library.
intersphinx_mapping = {'http://docs.python.org/': None} intersphinx_mapping = {'https://docs.python.org/': None}
...@@ -212,6 +212,11 @@ manager. Subsequent modifications don't have additional side-effects. ...@@ -212,6 +212,11 @@ manager. Subsequent modifications don't have additional side-effects.
Object which register themselves with the data manager are candidates Object which register themselves with the data manager are candidates
for storage to the backing store at a later point in time. for storage to the backing store at a later point in time.
Note that mutating a non-persistent attribute of a persistent object
such as a :class:`dict` or :class:`list` will *not* cause the
containing object to be changed. Instead you can either explicitly
control the state as described below, or use a
:class:`~.PersistentList` or :class:`~.PersistentMapping`.
Explicitly controlling ``_p_state`` Explicitly controlling ``_p_state``
----------------------------------- -----------------------------------
...@@ -412,9 +417,10 @@ Overriding the attribute protocol ...@@ -412,9 +417,10 @@ Overriding the attribute protocol
Subclasses which override the attribute-management methods provided by Subclasses which override the attribute-management methods provided by
:class:`persistent.Persistent`, but must obey some constraints: :class:`persistent.Persistent`, but must obey some constraints:
:meth:`__getattribute__``
:meth:`__getattribute__`
When overriding ``__getattribute__``, the derived class implementation When overriding ``__getattribute__``, the derived class implementation
**must** first call :meth:`persistent.Persistent._p_getattr`, passing the **must** first call :meth:`persistent.IPersistent._p_getattr`, passing the
name being accessed. This method ensures that the object is activated, name being accessed. This method ensures that the object is activated,
if needed, and handles the "special" attributes which do not require if needed, and handles the "special" attributes which do not require
activation (e.g., ``_p_oid``, ``__class__``, ``__dict__``, etc.) activation (e.g., ``_p_oid``, ``__class__``, ``__dict__``, etc.)
...@@ -423,7 +429,7 @@ Subclasses which override the attribute-management methods provided by ...@@ -423,7 +429,7 @@ Subclasses which override the attribute-management methods provided by
:meth:`__setattr__` :meth:`__setattr__`
When overriding ``__setattr__``, the derived class implementation When overriding ``__setattr__``, the derived class implementation
**must** first call :meth:`persistent.Persistent._p_setattr`, passing the **must** first call :meth:`persistent.IPersistent._p_setattr`, passing the
name being accessed and the value. This method ensures that the object is name being accessed and the value. This method ensures that the object is
activated, if needed, and handles the "special" attributes which do not activated, if needed, and handles the "special" attributes which do not
require activation (``_p_*``). If ``_p_setattr`` returns ``True``, the require activation (``_p_*``). If ``_p_setattr`` returns ``True``, the
...@@ -432,7 +438,7 @@ Subclasses which override the attribute-management methods provided by ...@@ -432,7 +438,7 @@ Subclasses which override the attribute-management methods provided by
:meth:`__detattr__` :meth:`__detattr__`
When overriding ``__detattr__``, the derived class implementation When overriding ``__detattr__``, the derived class implementation
**must** first call :meth:`persistent.Persistent._p_detattr`, passing the **must** first call :meth:`persistent.IPersistent._p_detattr`, passing the
name being accessed. This method ensures that the object is name being accessed. This method ensures that the object is
activated, if needed, and handles the "special" attributes which do not activated, if needed, and handles the "special" attributes which do not
require activation (``_p_*``). If ``_p_delattr`` returns ``True``, the require activation (``_p_*``). If ``_p_delattr`` returns ``True``, the
...@@ -440,5 +446,5 @@ Subclasses which override the attribute-management methods provided by ...@@ -440,5 +446,5 @@ Subclasses which override the attribute-management methods provided by
base class. base class.
:meth:`__getattr__` :meth:`__getattr__`
For the `__getattr__` method, the behavior is like that for regular Python For the ``__getattr__`` method, the behavior is like that for regular Python
classes and for earlier versions of ZODB 3. classes and for earlier versions of ZODB 3.
...@@ -21,6 +21,11 @@ from persistent._compat import UserList ...@@ -21,6 +21,11 @@ from persistent._compat import UserList
from persistent._compat import PYTHON2 from persistent._compat import PYTHON2
class PersistentList(UserList, persistent.Persistent): class PersistentList(UserList, persistent.Persistent):
"""A persistent wrapper for list objects.
Mutating instances of this class will cause them to be marked
as changed and automatically persisted.
"""
__super_setitem = UserList.__setitem__ __super_setitem = UserList.__setitem__
__super_delitem = UserList.__delitem__ __super_delitem = UserList.__delitem__
if PYTHON2: # pragma: no cover if PYTHON2: # pragma: no cover
......
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