2006年1月にPythonWorkshop03でDjangoを紹介した時のスライドです。

1. Django

2. Django
biography
Django Reinhardt 1910 Django 2003 2005 7
Rails
discography
www.ljworld.com
www.lawrence.com
projects.washingtonpost.com/contress/

3. main features

4. main features
O/R Mapper
Automatic Admin Interface
Elegant URL Design
Template
Cache
i18n

5. O/R Mapper

6. O/R Mapper
DRY
Model

7. O/R Mapper
DRY
Model
Model Database

8. O/R Mapper
DRY
Model
Model Database
SQLObject
SELECT keyword args
ForeignKey model
Index Model

9. Automatic Admin I/F

10. Automatic Admin I/F
model
rails scafford
TurboGears catwalk

11. Automatic Admin I/F
model
rails scafford
TurboGears catwalk

12. Automatic Admin I/F
model
rails scafford
TurboGears catwalk

13. Elegant URL Desgin

14. Elegant URL Desgin
URL
emacs PROJECT/apps/project/urls.py
(r'^Task/(?P<task_id>d+)/edit/$','Project.apps.project.views.edit'),
emacs PROJECT/apps/project/views.py
def edit(request, task_id) :
do_somthing

15. Elegant URL Desgin
URL
http://host/WorkStyle/Task/5/edit/
emacs PROJECT/apps/project/urls.py
(r'^Task/(?P<task_id>d+)/edit/$','Project.apps.project.views.edit'),
emacs PROJECT/apps/project/views.py
def edit(request, task_id) :
do_somthing

16. Elegant URL Desgin
URL
http://host/WorkStyle/Task/5/edit/
5
emacs PROJECT/apps/project/urls.py
(r'^Task/(?P<task_id>d+)/edit/$','Project.apps.project.views.edit'),
emacs PROJECT/apps/project/views.py
def edit(request, task_id) :
do_somthing

17. Elegant URL Desgin
URL
emacs PROJECT/apps/project/urls.py
(r'^Task/(?P<task_id>d+)/edit/$','Project.apps.project.views.edit'),
emacs PROJECT/apps/project/views.py
def edit(request, task_id) :
do_somthing

18. Template

19. Template
{{ XXX:escape }}
{% if task.update_date %}
<tr>
<th nowrap="nowrap">{% trans "Last Update" %}</th>
<td>{{ task.update_date|date:"Y/m/d" }}</td>
</tr>
{% endif %}

20. Template
{{ XXX:escape }}
{% if task.update_date %} filter
<tr>
<th nowrap="nowrap">{% trans "Last Update" %}</th>
<td>{{ task.update_date|date:"Y/m/d" }}</td>
</tr>
{% endif %}

21. Template
{{ XXX:escape }}
Tag
{% if task.update_date %}
<tr>
<th nowrap="nowrap">{% trans "Last Update" %}</th>
<td>{{ task.update_date|date:"Y/m/d" }}</td>
</tr>
{% endif %}

22. cache

23. cache
3
HTTP

24. Cache
cache locmem(
WorkStyle
sqlite3 SQL 5 O/R
:P4-2.4GHz+1GBMem, Gentoo, apache:2.0.54, mod_python3.x
:iBookG4-800MHz, 640MBMem, ApacheBench1.3d
1000request 10concurrency

25. Cache
cache locmem(
WorkStyle
sqlite3 SQL 5 O/R
:P4-2.4GHz+1GBMem, Gentoo, apache:2.0.54, mod_python3.x
:iBookG4-800MHz, 640MBMem, ApacheBench1.3d
1000request 10concurrency
normal apache locmem
totaltime 114.98 20.95 5.05
rec/sec 8.7 47.72 197.82

26. Cache
cache locmem(
WorkStyle
sqlite3 SQL 5 O/R
:P4-2.4GHz+1GBMem, Gentoo, apache:2.0.54, mod_python3.x
:iBookG4-800MHz, 640MBMem, ApacheBench1.3d
1000request 10concurrency total time Request/sec
200
150
normal apache locmem
100
totaltime 114.98 20.95 5.05
50
rec/sec 8.7 47.72 197.82
0
normal apache locmem

27. i18n

28. i18n
po
settings.py
Automatic Admin I/F

29. i18n
po
settings.py
Automatic Admin I/F
code
_(“message”)
{% trans “message” %}
template

30. i18n
po
settings.py
Automatic Admin I/F
po
DJANGO_HOME/bin/make-messages.py -l ja
DJANGO_HOME/bin/compile-messages.py
compile

31. i18n
po
settings.py
Automatic Admin I/F
> emacs settings.py
MIDDLEWARE_CLASSES = (
'django.middleware.locale.LocaleMiddleware',
'django.middleware.sessions.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
)

32. Python2.3
Apache2.x+mod_python3.x
fast-cgi(WSGI)
PostgreSQL/MySQL/SQLite3/SQLServer

33. Project
Django
Model
URL
view
Template

34. Django
Django python manage.py init
python manage.py startapp APP
Project
APP APP python manage.py install APP
Project
django-admin.py startproject PROJECT
APP

35. NO
django-admin.py startproject PROJECT
YES
Django
python manage.py init
python manage.py startapp APP
emacs app/APP/models/APP.py
python manage.py install APP

36. Project
django-admin.py startproject WorkStyle
WorkStyle
+ apps
__init__.py
__init__.py
urls.py
settings.py
manage.py

37. Project
django-admin.py startproject WorkStyle
WorkStyle
+ apps
__init__.py
__init__.py
urls.py
settings.py
manage.py
Project

38. > emacs Project/settings.py
# 'postgresql', 'mysql', 'sqlite3' or 'ado_mssql'.
DATABASE_ENGINE = 'postgresql'
DATABASE_NAME = 'workstyle'
DATABASE_USER = 'workstyle'
DATABASE_PASSWORD = 'workstyle'
DATABASE_HOST = ''
DATABASE_PORT = ''

39. Django
Django
python manage.py init
## DJANGO CORE TABLE
auth_groups auth_groups_permissions
auth_messages auth_permissions
auth_users auth_users_groups
auth_users_user_permissions
content_types core_sessions
packages sites

40. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

41. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

42. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

43. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

44. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

45. python manage.py startapp workstyle
WorkStyle
+ apps
__init__.py
+ workstyle
__init__.py
view.py
+ models
__init__.py
workstyles.py
__init__.py
urls.py
settings.py
manage.py

46. Model
Model
> emacs Project/apps/workstyle/models/workstyle.py
from django.core import meta
class Task(meta.Model):
task = meta.TextField(db_index=True)
create_date = meta.DateTimeField(auto_now_add=True)
update_date = meta.DateTimeField()
tag_searchable = meta.CharField(maxlength=800, db_index=True, null=True)
estimate = meta.FloatField(max_digits=3, default=0, decimal_places=1,
null=True)
status = meta.IntegerField(maxlength=1, default=3,
choices=TASK_STATUS_CHOICES, db_index=True)
class META:
ordering = ['-update_date']

47. Model
Model
meta.Model
> emacs Project/apps/workstyle/models/workstyle.py
from django.core import meta
class Task(meta.Model):
task = meta.TextField(db_index=True)
create_date = meta.DateTimeField(auto_now_add=True)
update_date = meta.DateTimeField()
tag_searchable = meta.CharField(maxlength=800, db_index=True, null=True)
estimate = meta.FloatField(max_digits=3, default=0, decimal_places=1,
null=True)
status = meta.IntegerField(maxlength=1, default=3,
choices=TASK_STATUS_CHOICES, db_index=True)
class META:
ordering = ['-update_date']

48. Model
python manage.py install workstyle
## APPLICATION TABLE
workstyle_tasks workstyle_tags
workstyle_taglists workstyle_comments
workstyle_attachments

49. Model
python manage.py install workstyle
## APPLICATION TABLE
workstyle_tasks workstyle_tags
workstyle_taglists workstyle_comments
workstyle_attachments

50. Model
python manage.py install workstyle
## APPLICATION TABLE
workstyle_tasks workstyle_tags
workstyle_taglists workstyle_comments
workstyle_attachments
Class

51. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python

52. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python
import django.models.workstyle import tasks, comments
#tasks Task workstyle_tasks
#(Black Magic)
tasks.get_list(**keyargs) #
query = {}
query[‘status__in’] = [1,2,3]
tasks.get_list(**query)

53. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python
import django.models.workstyle import tasks, comments
tsk1 = tasks.get_object(pk=1) #pk
tsk1.status = 2
tsk1.save() #
tsk2 = tasks.Task(task='hoge',status=2, update_date=datetime.now())
tsk2.save() #

54. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python
import django.models.workstyle import tasks, comments
#
tsk.add_comment(comment=in_comment_body, commentator=in_commentator)
# 1:n
tsk.get_comment_list()

55. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python
import django.models.workstyle import tasks, comments
#join:Comment
# Comment get_task SQL
comments.get_list(select_related=True)

56. O/R
Python
> export DJANGO_SETTINGS_MODULE=WorkStyle.settings
> python
import django.models.workstyle import tasks, comments
#join:Comment
# Comment get_task SQL
comments.get_list(select_related=True)

58. URL Dispatcher
> emacs Project/urls.py
(r'^WorkStyle/', include('WorkStyle.apps.workstyle.urls')),
> touch Project/apps/workstyle/urls.py
> emacs Project/apps/workstyle/urls.py
(r'^Task/(?P<task_id>d+)/edit/$', 'WorkStyle.apps.workstyle.task.edit_task'),

59. URL Dispatcher
> emacs Project/urls.py
(r'^WorkStyle/', include('WorkStyle.apps.workstyle.urls')),
> touch Project/apps/workstyle/urls.py
> emacs Project/apps/workstyle/urls.py
(r'^Task/(?P<task_id>d+)/edit/$', 'WorkStyle.apps.workstyle.task.edit_task'),

60. > emacs WorkStyle/apps/workstyle/task.py
def edit_task(request, task_id) :
task = get_object_or_404(tasks,pk=task_id)
manipulator = tasks.ChangeManiplator()
if request.POST :
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if not errors :
#
return render_to_response(....)
else :
errors = {}
new_data = {'status': str(task.status), 'task': task.task,
'estimate': task.estimate}
return render_to_response('workstyle/TaskFormEdit',{'form': form,
'task': task....})

61. > emacs WorkStyle/apps/workstyle/task.py
def edit_task(request, task_id) :
task = get_object_or_404(tasks,pk=task_id)
manipulator = tasks.ChangeManiplator()
if request.POST :
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if not errors :
#
return render_to_response(....)
else :
errors = {}
new_data = {'status': str(task.status), 'task': task.task,
'estimate': task.estimate}
return render_to_response('workstyle/TaskFormEdit',{'form': form,
'task': task....})

62. Manipulator
model
Manipulator (Add,Change)
def create(request):
manipulator = tasks.AddManipulator()
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if errors :
#
else :
manipulator.do_html2python(request.POST)
new_task = manipulator.save(request.POST)

63. Manipulator
model Add Change
Manipulator (Add,Change)
def create(request):
manipulator = tasks.AddManipulator()
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if errors :
#
else :
manipulator.do_html2python(request.POST)
new_task = manipulator.save(request.POST)

64. Manipulator
validation
model
errors Manipulator (Add,Change)
def create(request):
manipulator = tasks.AddManipulator()
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if errors :
#
else :
manipulator.do_html2python(request.POST)
new_task = manipulator.save(request.POST)

65. Manipulator
model
Manipulator (Add,Change)
def create(request):
manipulator = tasks.AddManipulator()
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if errors :
#
else :
manipulator.do_html2python(request.POST)
new_task = manipulator.save(request.POST)

66. Manipulator
class TaskManipulator(formfields.Manipulator):
def __init__(self):
self.fields = (
formfields.LargeTextField(
field_name="task_tag",
validator_list=[self.isValidTagName]),
formfields.TextField(
field_name="commentator",
maxlength=50,
is_required=False),
formfields.SelectField(
field_name="status",
choices=TASK_STATUS,
is_required=True),
)
def isValidTagName(self, field_data, all_data):
task_tag_list = string.split(field_data, "]")
for task_tag in task_tag_list :
task_tag = string.strip(string.replace(task_tag, "[", ""))
if len(task_tag) > 49 :
raise validators.ValidationError(_("Tag's name is must be
less than 50 characters."))

67. Manipulator
#view
manipulator = TaskManipulator()
try :
task = tasks.get_object(pk=task_id)
except ObjectDoesNotExist :
raise Http404
if request.POST :
new_data = request.POST.copy()
errors = manipulator.get_validation_errors(new_data)
if not errors :
return update_task(request, task_id)
else :

68. Template
settings.py Template
> emacs Project/settings.py
TEMPLATE_DIRS = (
WORKSTYLE_BASE_DIR + "/apps/workstyle/templates",
)

69. Template
settings.py Template
> emacs Project/settings.py
TEMPLATE_DIRS = (
WORKSTYLE_BASE_DIR + "/apps/workstyle/templates",
)
> emacs Project/apps/workstyle/templates/workstyle/TaskForm.html
<div id="main">
{% block formaction %}
<form
action="{{ workstyle_root }}/Task/{{ task.id }}/update/"
name="taskForm"
method="POST" enctype="multipart/form-data"
class="tableForm" onSubmit="return checkBody();">
{% endblock %}
Base

70. Template
settings.py Template
> emacs Project/settings.py
TEMPLATE_DIRS = (
WORKSTYLE_BASE_DIR + "/apps/workstyle/templates",
)
> emacs Project/apps/workstyle/templates/workstyle/TaskFormNew.html
{% extends "workstyle/TaskForm" %}
{%block formaction %}
<form action="{{ workstyle_root }}/Task/add/" name="task_form"
method="POST" enctype="multipart/form-data" class="tableForm"
onSubmit="return checkBody();">
{% endblock %}
New extends Base

71. Template
settings.py Template
> emacs Project/settings.py
TEMPLATE_DIRS = (
WORKSTYLE_BASE_DIR + "/apps/workstyle/templates",
)
> emacs Project/apps/workstyle/templates/workstyle/TaskFormEdit.html
{% extends "workstyle/TaskForm" %}
{%block formaction %}
<form
action="{{ workstyle_root }}/Task/{{ task.id }}/update/"
name="taskForm"
method="POST" enctype="multipart/form-data" class="tableForm"
onSubmit="return checkBody();">
{% endblock %} Edit extends Base

72. > emacs Project/apps/workstyle/templatetags/wsfilter.py
from django.core import template
register = template.Library()
def truncatelines(value, arg) :
result = value
#do something
return result
register.filter('truncatelines', truncatelines)

73. > emacs Porject/apps/workstyle/task.py
from WorkStyle.apps.workstyle.templatetags import wsfilters

74. > emacs Porject/apps/workstyle/task.py
from WorkStyle.apps.workstyle.templatetags import wsfilters
> emacs Project/apps/workstyle/templates/workstyle/TaskList.html
{% load wsfilters %}
{{ task.task|truncatelines:3 }}

75. Test
pyunit
simon.bofh.ms

76. Django Milestone
0.92
Magic
1.00

77. www.everes.net