gva/gnuviechadmin/userdbs/admin.py

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2015-01-04 20:22:47 +01:00
"""
Admin functionality for the :py:mod:`userdbs.models` models.
"""
from __future__ import absolute_import
from django import forms
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from django.contrib import admin
from django.utils.translation import ugettext_lazy as _
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from .models import (
DatabaseUser,
UserDatabase,
)
class DatabaseUserCreationForm(forms.ModelForm):
"""
A form for creating :py:class:`database users
<userdbs.models.DatabaseUser>`
"""
class Meta:
model = DatabaseUser
fields = ['osuser', 'db_type']
def save(self, commit=True):
"""
Save the database user.
:param boolean commit: whether to save the created database user
:return: database user instance
:rtype: :py:class:`userdbs.models.DatabaseUser`
"""
dbuser = DatabaseUser.objects.create_database_user(
osuser=self.cleaned_data['osuser'],
db_type=self.cleaned_data['db_type'], commit=commit)
return dbuser
def save_m2m(self):
"""
Noop.
"""
class UserDatabaseCreationForm(forms.ModelForm):
"""
A form for creating :py:class:`user databases
<userdbs.models.UserDatabase>`
"""
class Meta:
model = UserDatabase
fields = ['db_user']
def save(self, commit=True):
"""
Save the user database.
:param boolean commit: whether to save the created user database
:return: user database instance
:rtype: :py:class:`userdbs.models.UserDatabase`
"""
database = UserDatabase.objects.create_userdatabase(
db_user=self.cleaned_data['db_user'], commit=commit)
return database
def save_m2m(self):
"""
Noop.
"""
class DatabaseUserAdmin(admin.ModelAdmin):
"""
Admin class for working with :py:class:`database users
<userdbs.models.DatabaseUser>`
"""
actions = ['perform_delete_selected']
add_form = DatabaseUserCreationForm
def get_form(self, request, obj=None, **kwargs):
"""
Use special form for database user creation.
:param request: the current HTTP request
:param obj: either a :py:class:`Database user
<userdbs.models.DatabaseUser>` instance or None for a new database
user
:param kwargs: keyword arguments to be passed to
:py:meth:`django.contrib.admin.ModelAdmin.get_form`
:return: form instance
"""
defaults = {}
if obj is None:
defaults.update({
'form': self.add_form,
})
defaults.update(kwargs)
return super(DatabaseUserAdmin, self).get_form(
request, obj, **defaults)
def get_readonly_fields(self, request, obj=None):
"""
Make sure that osuser, name and db_type are not editable for existing
database users.
:param request: the current HTTP request
:param obj: either a :py:class:`Database user
<userdbs.models.DatabaseUser>` instance or None for a new database
user
:return: a list of fields
:rtype: list
"""
if obj:
return ['osuser', 'name', 'db_type']
return []
def save_model(self, request, obj, form, change):
"""
Make sure that the user is created in the target database.
:param request: the current HTTP request
:param obj: a :py:class:`Database user <userdbs.models.DatabaseUser>`
instance
:param form: the form instance
:param boolean change: whether this is a change operation or not
"""
if not change:
obj.create_in_database()
super(DatabaseUserAdmin, self).save_model(request, obj, form, change)
def perform_delete_selected(self, request, queryset):
"""
Action to delete a list of selected database users.
This action calls the delete method of each selected database user in
contrast to the default `delete_selected`
:param request: the current HTTP request
:param queryset: Django ORM queryset representing the selected database
users
"""
for dbuser in queryset.all():
dbuser.delete()
perform_delete_selected.short_description = _(
'Delete selected database users')
def get_actions(self, request):
"""
Get the available actions for database users.
This overrides the default behavior to remove the default
`delete_selected` action.
:param request: the current HTTP request
:return: list of actions
:rtype: list
"""
actions = super(DatabaseUserAdmin, self).get_actions(request)
if 'delete_selected' in actions: # pragma: no cover
del actions['delete_selected']
return actions
class UserDatabaseAdmin(admin.ModelAdmin):
"""
Admin class for working with :py:class:`user databases
<userdbs.models.UserDatabase>`
"""
actions = ['perform_delete_selected']
add_form = UserDatabaseCreationForm
def get_form(self, request, obj=None, **kwargs):
"""
Use special form for user database creation.
:param request: the current HTTP request
:param obj: either a :py:class:`User database
<userdbs.models.UserDatabase>` instance or None for a new user
database
:param kwargs: keyword arguments to be passed to
:py:meth:`django.contrib.admin.ModelAdmin.get_form`
:return: form instance
"""
defaults = {}
if obj is None:
defaults.update({
'form': self.add_form,
})
defaults.update(kwargs)
return super(UserDatabaseAdmin, self).get_form(
request, obj, **defaults)
def get_readonly_fields(self, request, obj=None):
"""
Make sure that db_name and db_user are not editable for existing user
databases.
:param request: the current HTTP request
:param obj: either a :py:class:`User database
<userdbs.models.UserDatabase>` instance or None for a new user
database
:return: a list of fields
:rtype: list
"""
if obj:
return ['db_name', 'db_user']
return []
def save_model(self, request, obj, form, change):
"""
Make sure that the database is created in the target database server.
:param request: the current HTTP request
:param obj: a :py:class:`Database user <userdbs.models.DatabaseUser>`
instance
:param form: the form instance
:param boolean change: whether this is a change operation or not
"""
if not change:
obj.create_in_database()
super(UserDatabaseAdmin, self).save_model(request, obj, form, change)
def perform_delete_selected(self, request, queryset):
"""
Action to delete a list of selected user databases.
This action calls the delete method of each selected user database in
contrast to the default `delete_selected`
:param request: the current HTTP request
:param queryset: Django ORM queryset representing the selected user
databases
"""
for database in queryset.all():
database.delete()
perform_delete_selected.short_description = _(
'Delete selected user databases')
def get_actions(self, request):
"""
Get the available actions for user databases.
This overrides the default behavior to remove the default
`delete_selected` action.
:param request: the current HTTP request
:return: list of actions
:rtype: list
"""
actions = super(UserDatabaseAdmin, self).get_actions(request)
if 'delete_selected' in actions: # pragma: no cover
del actions['delete_selected']
return actions
admin.site.register(DatabaseUser, DatabaseUserAdmin)
admin.site.register(UserDatabase, UserDatabaseAdmin)