Creates a Sphinx documentation.

This commit is contained in:
Bertrand Bordage 2014-10-28 23:44:28 +01:00
parent bc31429394
commit d36ee841b9
12 changed files with 655 additions and 3 deletions

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sdist/
*.egg-info/
.coverage
docs/_*/

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# Makefile for Sphinx documentation
#
# You can set these variables from the command line.
SPHINXOPTS =
SPHINXBUILD = sphinx-build
PAPER =
BUILDDIR = _build
# User-friendly check for sphinx-build
ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
endif
# Internal variables.
PAPEROPT_a4 = -D latex_paper_size=a4
PAPEROPT_letter = -D latex_paper_size=letter
ALLSPHINXOPTS = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
# the i18n builder cannot share the environment and doctrees with the others
I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
help:
@echo "Please use \`make <target>' where <target> is one of"
@echo " html to make standalone HTML files"
@echo " dirhtml to make HTML files named index.html in directories"
@echo " singlehtml to make a single large HTML file"
@echo " pickle to make pickle files"
@echo " json to make JSON files"
@echo " htmlhelp to make HTML files and a HTML help project"
@echo " qthelp to make HTML files and a qthelp project"
@echo " devhelp to make HTML files and a Devhelp project"
@echo " epub to make an epub"
@echo " latex to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
@echo " latexpdf to make LaTeX files and run them through pdflatex"
@echo " latexpdfja to make LaTeX files and run them through platex/dvipdfmx"
@echo " text to make text files"
@echo " man to make manual pages"
@echo " texinfo to make Texinfo files"
@echo " info to make Texinfo files and run them through makeinfo"
@echo " gettext to make PO message catalogs"
@echo " changes to make an overview of all changed/added/deprecated items"
@echo " xml to make Docutils-native XML files"
@echo " pseudoxml to make pseudoxml-XML files for display purposes"
@echo " linkcheck to check all external links for integrity"
@echo " doctest to run all doctests embedded in the documentation (if enabled)"
clean:
rm -rf $(BUILDDIR)/*
html:
$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
dirhtml:
$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
@echo
@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
singlehtml:
$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
@echo
@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
pickle:
$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
@echo
@echo "Build finished; now you can process the pickle files."
json:
$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
@echo
@echo "Build finished; now you can process the JSON files."
htmlhelp:
$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
@echo
@echo "Build finished; now you can run HTML Help Workshop with the" \
".hhp project file in $(BUILDDIR)/htmlhelp."
qthelp:
$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
@echo
@echo "Build finished; now you can run "qcollectiongenerator" with the" \
".qhcp project file in $(BUILDDIR)/qthelp, like this:"
@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/django-cachalot.qhcp"
@echo "To view the help file:"
@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/django-cachalot.qhc"
devhelp:
$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
@echo
@echo "Build finished."
@echo "To view the help file:"
@echo "# mkdir -p $$HOME/.local/share/devhelp/django-cachalot"
@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/django-cachalot"
@echo "# devhelp"
epub:
$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
@echo
@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
latex:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo
@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
@echo "Run \`make' in that directory to run these through (pdf)latex" \
"(use \`make latexpdf' here to do that automatically)."
latexpdf:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo "Running LaTeX files through pdflatex..."
$(MAKE) -C $(BUILDDIR)/latex all-pdf
@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
latexpdfja:
$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
@echo "Running LaTeX files through platex and dvipdfmx..."
$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
text:
$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
@echo
@echo "Build finished. The text files are in $(BUILDDIR)/text."
man:
$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
@echo
@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
texinfo:
$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
@echo
@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
@echo "Run \`make' in that directory to run these through makeinfo" \
"(use \`make info' here to do that automatically)."
info:
$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
@echo "Running Texinfo files through makeinfo..."
make -C $(BUILDDIR)/texinfo info
@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
gettext:
$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
@echo
@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
changes:
$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
@echo
@echo "The overview file is in $(BUILDDIR)/changes."
linkcheck:
$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
@echo
@echo "Link check complete; look for any errors in the above output " \
"or in $(BUILDDIR)/linkcheck/output.txt."
doctest:
$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
@echo "Testing of doctests in the sources finished, look at the " \
"results in $(BUILDDIR)/doctest/output.txt."
xml:
$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml
@echo
@echo "Build finished. The XML files are in $(BUILDDIR)/xml."
pseudoxml:
$(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILDDIR)/pseudoxml
@echo
@echo "Build finished. The pseudo-XML files are in $(BUILDDIR)/pseudoxml."

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.. _API:
API
---
Use these tools if the automatic behaviour of django-cachalot is not enough.
Typically, use ``invalidate_tables`` or ``invalidate_models`` after each raw
SQL query modifying the database.
.. automodule:: cachalot.api
:members:

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# -*- coding: utf-8 -*-
#
# django-cachalot documentation build configuration file, created by
# sphinx-quickstart on Tue Oct 28 22:46:50 2014.
#
# This file is execfile()d with the current directory set to its
# containing dir.
#
# Note that not all possible configuration values are present in this
# autogenerated file.
#
# All configuration values have a default; values that are commented out
# serve to show the default.
import sys
import os
sys.path.insert(0, os.path.abspath('..'))
import cachalot
# This sets up Django, necessary for autodoc
import runtests
# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#sys.path.insert(0, os.path.abspath('.'))
# -- General configuration ------------------------------------------------
# If your documentation needs a minimal Sphinx version, state it here.
#needs_sphinx = '1.0'
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = [
'sphinx.ext.autodoc',
'sphinx.ext.intersphinx',
'sphinx.ext.todo',
'sphinx.ext.coverage',
'sphinx.ext.ifconfig',
'sphinx.ext.viewcode',
]
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']
# The suffix of source filenames.
source_suffix = '.rst'
# The encoding of source files.
#source_encoding = 'utf-8-sig'
# The master toctree document.
master_doc = 'index'
# General information about the project.
project = 'django-cachalot'
copyright = '2014, Bertrand Bordage'
# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#
# The short X.Y version.
version = '%s.%s' % cachalot.__version__[:2]
# The full version, including alpha/beta/rc tags.
release = cachalot.version_string
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#language = None
# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
#today = ''
# Else, today_fmt is used as the format for a strftime call.
#today_fmt = '%B %d, %Y'
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
exclude_patterns = ['_build']
# The reST default role (used for this markup: `text`) to use for all
# documents.
#default_role = None
# If true, '()' will be appended to :func: etc. cross-reference text.
#add_function_parentheses = True
# If true, the current module name will be prepended to all description
# unit titles (such as .. function::).
#add_module_names = True
# If true, sectionauthor and moduleauthor directives will be shown in the
# output. They are ignored by default.
#show_authors = False
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
# A list of ignored prefixes for module index sorting.
#modindex_common_prefix = []
# If true, keep warnings as "system message" paragraphs in the built documents.
#keep_warnings = False
# -- Options for HTML output ----------------------------------------------
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
html_theme = 'default'
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the
# documentation.
#html_theme_options = {}
# Add any paths that contain custom themes here, relative to this directory.
#html_theme_path = []
# The name for this set of Sphinx documents. If None, it defaults to
# "<project> v<release> documentation".
#html_title = None
# A shorter title for the navigation bar. Default is the same as html_title.
#html_short_title = None
# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#html_logo = None
# The name of an image file (within the static path) to use as favicon of the
# docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32
# pixels large.
#html_favicon = None
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']
# Add any extra paths that contain custom files (such as robots.txt or
# .htaccess) here, relative to this directory. These files are copied
# directly to the root of the documentation.
#html_extra_path = []
# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
# using the given strftime format.
#html_last_updated_fmt = '%b %d, %Y'
# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.
#html_use_smartypants = True
# Custom sidebar templates, maps document names to template names.
#html_sidebars = {}
# Additional templates that should be rendered to pages, maps page names to
# template names.
#html_additional_pages = {}
# If false, no module index is generated.
#html_domain_indices = True
# If false, no index is generated.
#html_use_index = True
# If true, the index is split into individual pages for each letter.
#html_split_index = False
# If true, links to the reST sources are added to the pages.
#html_show_sourcelink = True
# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
#html_show_sphinx = True
# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
#html_show_copyright = True
# If true, an OpenSearch description file will be output, and all pages will
# contain a <link> tag referring to it. The value of this option must be the
# base URL from which the finished HTML is served.
#html_use_opensearch = ''
# This is the file name suffix for HTML files (e.g. ".xhtml").
#html_file_suffix = None
# Output file base name for HTML help builder.
htmlhelp_basename = 'django-cachalotdoc'
# -- Options for LaTeX output ---------------------------------------------
latex_elements = {
# The paper size ('letterpaper' or 'a4paper').
#'papersize': 'letterpaper',
# The font size ('10pt', '11pt' or '12pt').
#'pointsize': '10pt',
# Additional stuff for the LaTeX preamble.
#'preamble': '',
}
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
# author, documentclass [howto, manual, or own class]).
latex_documents = [
('index', 'django-cachalot.tex', u'django-cachalot Documentation',
u'Bertrand Bordage', 'manual'),
]
# The name of an image file (relative to this directory) to place at the top of
# the title page.
#latex_logo = None
# For "manual" documents, if this is true, then toplevel headings are parts,
# not chapters.
#latex_use_parts = False
# If true, show page references after internal links.
#latex_show_pagerefs = False
# If true, show URL addresses after external links.
#latex_show_urls = False
# Documents to append as an appendix to all manuals.
#latex_appendices = []
# If false, no module index is generated.
#latex_domain_indices = True
# -- Options for manual page output ---------------------------------------
# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
('index', 'django-cachalot', u'django-cachalot Documentation',
[u'Bertrand Bordage'], 1)
]
# If true, show URL addresses after external links.
#man_show_urls = False
# -- Options for Texinfo output -------------------------------------------
# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
# dir menu entry, description, category)
texinfo_documents = [
('index', 'django-cachalot', u'django-cachalot Documentation',
u'Bertrand Bordage', 'django-cachalot', 'One line description of project.',
'Miscellaneous'),
]
# Documents to append as an appendix to all manuals.
#texinfo_appendices = []
# If false, no module index is generated.
#texinfo_domain_indices = True
# How to display URL addresses: 'footnote', 'no', or 'inline'.
#texinfo_show_urls = 'footnote'
# If true, do not generate a @detailmenu in the "Top" node's menu.
#texinfo_no_detailmenu = False
# Example configuration for intersphinx: refer to the Python standard library.
intersphinx_mapping = {'http://docs.python.org/': None}

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How django-cachalot works
-------------------------
**(If you dont care/understand, just pretend its magic)**
Reverse engineering
...................
Its a lot of Django reverse engineering combined with a strong test suite.
Such a test suite is crucial for a reverse engineering project.
If some important part of Django changes and breaks the expected behaviour,
you can be sure that the test suite will fail.
Monkey patching
...............
django-cachalot modifies Django in place during execution to add a caching tool
just before SQL queries are executed.
We detect which cache keys must be removed when some data
is created/changed/deleted on the database.

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***************
django-cachalot
***************
Caches your Django ORM queries and automatically invalidates them.
.. image:: https://raw.github.com/BertrandBordage/django-cachalot/master/django-cachalot.jpg
Project status:
**Currently in beta, do not use in production**
.. image:: http://img.shields.io/pypi/v/django-cachalot.svg?style=flat-square
:target: https://pypi.python.org/pypi/django-cachalot
.. image:: http://img.shields.io/travis/BertrandBordage/django-cachalot/master.svg?style=flat-square
:target: https://travis-ci.org/BertrandBordage/django-cachalot
.. image:: http://img.shields.io/coveralls/BertrandBordage/django-cachalot/master.svg?style=flat-square
:target: https://coveralls.io/r/BertrandBordage/django-cachalot?branch=master
.. image:: http://img.shields.io/scrutinizer/g/BertrandBordage/django-cachalot/master.svg?style=flat-square
:target: https://scrutinizer-ci.com/g/BertrandBordage/django-cachalot/
.. image:: http://img.shields.io/gratipay/BertrandBordage.svg?style=flat-square
:target: https://gratipay.com/BertrandBordage/
Contents:
.. toctree::
:maxdepth: 2
quickstart
limits
api
todo
reporting
how
legacy

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Legacy
------
This work is highly inspired of
`johnny-cache <https://github.com/jmoiron/johnny-cache>`_, another easy-to-use
ORM caching tool! Its working with Django <= 1.5.
I used it in production during 3 years, its an excellent module!
Unfortunately, we failed to make it migrate to Django 1.6 (I was involved).
It was mostly because of the transaction system that was entirely refactored.
I also noticed a few advanced invalidation issues when using ``QuerySet.extra``
and some complex cases implying multi-table inheritance
and related ``ManyToManyField``.

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.. _limits:
Limits
------
Locmem
......
Locmem is a just a dict stored in a single Python process.
Its not shared between processes, so dont use locmem with django-cachalot
in a multi-processes project, if you use RQ or Celery for instance.
Raw queries
...........
Django-cachalot doesnt cache queries it cant reliably invalidate.
If a SQL query or a part of it is written in pure SQL, it wont be cached.
Thats why ``QuerySet.extra`` with ``select`` or ``where`` arguments,
``Model.objects.raw(…)``, & ``cursor.execute(…)`` queries are not cached.
If you modify the database using a raw query, **you will have to manually
invalidate** django-cachalot using one of the tools available in :ref:`the API <API>`.

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Quick start
-----------
Requirements
............
- Django 1.6 or 1.7
- Python 2.6, 2.7, 3.2, 3.3, or 3.4
- `django-redis <https://github.com/niwibe/django-redis>`_,
`memcached <https://docs.djangoproject.com/en/1.7/topics/cache/#memcached>`_
(or `locmem <https://docs.djangoproject.com/en/1.7/topics/cache/#local-memory-caching>`_,
but its not shared between processes, so dont use it with RQ or Celery)
- PostgreSQL, MySQL or SQLite
Usage
.....
#. ``pip install django-cachalot``
#. Add ``'cachalot',`` to your ``INSTALLED_APPS``
#. Be aware of :ref:`the few limits <limits>`
#. Enjoy!
Settings
........
==================== ============= ============================================
Setting Default value Description
==================== ============= ============================================
``CACHALOT_ENABLED`` ``True`` If set to ``False``, disables SQL caching
but keeps invalidating to avoid stale cache
``CACHALOT_CACHE`` ``'default'`` Alias of the cache from |CACHES|_ used by
django-cachalot
==================== ============= ============================================
.. |CACHES| replace:: ``CACHES``
.. _CACHES: https://docs.djangoproject.com/en/1.7/ref/settings/#std:setting-CACHES
These settings can be changed whenever you want.
You have to use ``cachalot_settings`` as a context manager, a decorator,
or simply by changing its attributes:
.. code:: python
from cachalot.settings import cachalot_settings
with cachalot_settings(CACHALOT_ENABLED=False):
# SQL queries are not cached in this block
@cachalot_settings(CACHALOT_CACHE='another_alias')
def your_function():
# Whats in this function uses another cache
# Globally disables SQL caching until you set it back to True
cachalot_settings.CACHALOT_ENABLED = False
In tests, you can use
`Djangos testing tools <https://docs.djangoproject.com/en/1.7/topics/testing/tools/#overriding-settings>`_
as well as ``cachalot_settings``. The only difference is that you cant use
``cachalot_settings`` to decorate a class.

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Bug reports, questions, discussion, new features
------------------------------------------------
- If you spotted **a bug**, please file a precise bug report
`on GitHub <https://github.com/BertrandBordage/django-cachalot/issues>`_
- If you have **a question** on how django-cachalot works or to **simply
discuss**, `go to our Google group
<https://groups.google.com/forum/#!forum/django-cachalot>`_.
- If you want **to add a feature**:
- if you have an idea on how to implement it, you can fork the project
and send a pull request, but **please open an issue first**, because
someone else could already be working on it
- if youre sure that its a must-have feature, open an issue
- if its just a vague idea, please ask on google groups before

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What still needs to be done
---------------------------
For version 1.0
...............
- Test if a stale cache issue happens when a table is invalidated
exactly during a SQL read query
- Write tests for `multi-table inheritance <https://docs.djangoproject.com/en/1.7/topics/db/models/#multi-table-inheritance>`_
- Test if code injections can occur when unpickling query results
(or use a safer serialization tool)
In a more distant future
........................
- Add a setting to choose if we cache ``QuerySet.order_by('?')``
- Use ``connection.introspection.table_names()`` to detect which tables
are implied in a ``QuerySet.extra``

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@ -63,11 +63,11 @@ settings.configure(
PASSWORD_HASHERS=('django.contrib.auth.hashers.MD5PasswordHasher',),
)
if django.VERSION[:2] >= (1, 7):
django.setup()
if __name__ == '__main__':
if django.VERSION[:2] >= (1, 7):
django.setup()
from django.test.runner import DiscoverRunner
test_runner = DiscoverRunner()
failures = test_runner.run_tests(['cachalot.tests'])