django-orchestra-test/orchestra/apps/resources/admin.py

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from django.contrib import admin, messages
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from django.contrib.contenttypes import generic
from django.utils.functional import cached_property
from django.utils.translation import ugettext_lazy as _
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from orchestra.admin import ExtendedModelAdmin
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from orchestra.admin.filters import UsedContentTypeFilter
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from orchestra.admin.utils import insertattr, get_modeladmin, admin_link, admin_date
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from orchestra.core import services
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from .forms import ResourceForm
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from .models import Resource, ResourceData, MonitorData
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class ResourceAdmin(ExtendedModelAdmin):
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list_display = (
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'id', 'verbose_name', 'content_type', 'period', 'on_demand',
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'default_allocation', 'unit', 'disable_trigger', 'crontab',
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)
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list_filter = (UsedContentTypeFilter, 'period', 'on_demand', 'disable_trigger')
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fieldsets = (
(None, {
'fields': ('name', 'content_type', 'period'),
}),
(_("Configuration"), {
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'fields': ('verbose_name', 'unit', 'scale', 'on_demand',
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'default_allocation', 'disable_trigger', 'is_active'),
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}),
(_("Monitoring"), {
'fields': ('monitors', 'crontab'),
}),
)
change_readonly_fields = ('name', 'content_type', 'period')
def add_view(self, request, **kwargs):
""" Warning user if the node is not fully configured """
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if request.method == 'POST':
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messages.warning(request, _(
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"Restarting orchestra and celerybeat is required to fully apply changes. "
"Remember that new allocated values will be applied when objects are saved."
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))
return super(ResourceAdmin, self).add_view(request, **kwargs)
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def save_model(self, request, obj, form, change):
super(ResourceAdmin, self).save_model(request, obj, form, change)
model = obj.content_type.model_class()
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modeladmin = type(get_modeladmin(model))
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resources = obj.content_type.resource_set.filter(is_active=True)
inlines = []
for inline in modeladmin.inlines:
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if inline.model is ResourceData:
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inline = resource_inline_factory(resources)
inlines.append(inline)
modeladmin.inlines = inlines
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def formfield_for_dbfield(self, db_field, **kwargs):
""" filter service content_types """
if db_field.name == 'content_type':
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models = [ model._meta.model_name for model in services.get() ]
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kwargs['queryset'] = db_field.rel.to.objects.filter(model__in=models)
return super(ResourceAdmin, self).formfield_for_dbfield(db_field, **kwargs)
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class ResourceDataAdmin(admin.ModelAdmin):
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list_display = (
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'id', 'resource_link', 'used', 'allocated', 'updated_at', 'content_object_link'
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)
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list_filter = ('resource',)
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readonly_fields = ('content_object_link',)
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resource_link = admin_link('resource')
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content_object_link = admin_link('content_object')
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def get_queryset(self, request):
queryset = super(ResourceDataAdmin, self).get_queryset(request)
return queryset.prefetch_related('content_object')
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class MonitorDataAdmin(admin.ModelAdmin):
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list_display = ('id', 'monitor', 'created_at', 'value', 'content_object_link')
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list_filter = ('monitor',)
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readonly_fields = ('content_object_link',)
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content_object_link = admin_link('content_object')
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def get_queryset(self, request):
queryset = super(MonitorDataAdmin, self).get_queryset(request)
return queryset.prefetch_related('content_object')
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admin.site.register(Resource, ResourceAdmin)
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admin.site.register(ResourceData, ResourceDataAdmin)
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admin.site.register(MonitorData, MonitorDataAdmin)
# Mokey-patching
def resource_inline_factory(resources):
class ResourceInlineFormSet(generic.BaseGenericInlineFormSet):
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def total_form_count(self, resources=resources):
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return len(resources)
@cached_property
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def forms(self, resources=resources):
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forms = []
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resources_copy = list(resources)
for i, data in enumerate(self.queryset):
forms.append(self._construct_form(i, resource=data.resource))
resources_copy.remove(data.resource)
for i, resource in enumerate(resources_copy, len(self.queryset)):
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forms.append(self._construct_form(i, resource=resource))
return forms
class ResourceInline(generic.GenericTabularInline):
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model = ResourceData
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verbose_name_plural = _("resources")
form = ResourceForm
formset = ResourceInlineFormSet
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can_delete = False
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fields = (
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'verbose_name', 'used', 'display_updated', 'allocated', 'unit'
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)
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readonly_fields = ('used', 'display_updated')
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class Media:
css = {
'all': ('orchestra/css/hide-inline-id.css',)
}
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display_updated = admin_date('updated_at', default=_("Never"))
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def has_add_permission(self, *args, **kwargs):
""" Hidde add another """
return False
return ResourceInline
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def insert_resource_inlines():
for ct, resources in Resource.objects.group_by('content_type').iteritems():
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inline = resource_inline_factory(resources)
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model = ct.model_class()
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insertattr(model, 'inlines', inline)