django-orchestra/orchestra/admin/options.py

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from django import forms
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from django.conf.urls import patterns, url
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from django.contrib import admin
from django.forms.models import BaseInlineFormSet
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from orchestra.utils.functional import cached
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from .utils import set_url_query, action_to_view
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class ChangeListDefaultFilter(object):
"""
Enables support for default filtering on admin change list pages
Your model admin class should define an default_changelist_filters attribute
default_changelist_filters = (('my_nodes', 'True'),)
"""
default_changelist_filters = ()
def changelist_view(self, request, extra_context=None):
""" Default filter as 'my_nodes=True' """
defaults = []
for key, value in self.default_changelist_filters:
set_url_query(request, key, value)
defaults.append(key)
# hack response cl context in order to hook default filter awaearness
# into search_form.html template
response = super(ChangeListDefaultFilter, self).changelist_view(request,
extra_context=extra_context)
if hasattr(response, 'context_data') and 'cl' in response.context_data:
response.context_data['cl'].default_changelist_filters = defaults
return response
class AtLeastOneRequiredInlineFormSet(BaseInlineFormSet):
def clean(self):
"""Check that at least one service has been entered."""
super(AtLeastOneRequiredInlineFormSet, self).clean()
if any(self.errors):
return
if not any(cleaned_data and not cleaned_data.get('DELETE', False)
for cleaned_data in self.cleaned_data):
raise forms.ValidationError('At least one item required.')
class ChangeViewActionsMixin(object):
""" Makes actions visible on the admin change view page. """
change_view_actions = ()
change_form_template = 'orchestra/admin/change_form.html'
def get_urls(self):
"""Returns the additional urls for the change view links"""
urls = super(ChangeViewActionsMixin, self).get_urls()
admin_site = self.admin_site
opts = self.model._meta
new_urls = patterns('')
for action in self.get_change_view_actions():
new_urls += patterns('',
url('^(\d+)/%s/$' % action.url_name,
admin_site.admin_view(action),
name='%s_%s_%s' % (opts.app_label,
opts.module_name,
action.url_name)))
return new_urls + urls
@cached
def get_change_view_actions(self):
views = []
for action in self.change_view_actions:
if isinstance(action, basestring):
action = getattr(self, action)
view = action_to_view(action, self)
view.url_name = getattr(action, 'url_name', action.__name__)
view.verbose_name = getattr(action, 'verbose_name',
view.url_name.capitalize().replace('_', ' '))
view.css_class = getattr(action, 'css_class', 'historylink')
view.description = getattr(action, 'description', '')
views.append(view)
return views
def change_view(self, *args, **kwargs):
if not 'extra_context' in kwargs:
kwargs['extra_context'] = {}
kwargs['extra_context']['object_tools_items'] = [
action.__dict__ for action in self.get_change_view_actions()
]
return super(ChangeViewActionsMixin, self).change_view(*args, **kwargs)
class ChangeAddFieldsMixin(object):
""" Enables to specify different set of fields for change and add views """
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add_fields = ()
add_fieldsets = ()
add_form = None
change_readonly_fields = ()
def get_readonly_fields(self, request, obj=None):
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fields = super(ChangeAddFieldsMixin, self).get_readonly_fields(request, obj=obj)
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if obj:
return fields + self.change_readonly_fields
return fields
def get_fieldsets(self, request, obj=None):
if not obj:
if self.add_fieldsets:
return self.add_fieldsets
elif self.add_fields:
return [(None, {'fields': self.add_fields})]
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return super(ChangeAddFieldsMixin, self).get_fieldsets(request, obj=obj)
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def get_inline_instances(self, request, obj=None):
""" add_inlines and inline.parent_object """
self.inlines = getattr(self, 'add_inlines', self.inlines)
if obj:
self.inlines = type(self).inlines
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inlines = super(ChangeAddFieldsMixin, self).get_inline_instances(request, obj=obj)
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for inline in inlines:
inline.parent_object = obj
return inlines
def get_form(self, request, obj=None, **kwargs):
""" Use special form during user creation """
defaults = {}
if obj is None and self.add_form:
defaults['form'] = self.add_form
defaults.update(kwargs)
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return super(ChangeAddFieldsMixin, self).get_form(request, obj, **defaults)
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class ExtendedModelAdmin(ChangeViewActionsMixin, ChangeAddFieldsMixin, admin.ModelAdmin):
pass