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我有報價（主），其含有的頭信息和總計的一個簡單的主/從模式，QuotationDetail（描述）含有當報價項目，這個孩子模型有一個PriceLevel FK字段用於計算每個單獨項目的標記。我想實現一個Django管理行動使管理員可以在上一次幾個項目改變這種PriceLevel，但我得到的錯誤：的Python Django的1.11「ValueError異常不完整格式」，在管理員動作試圖更新FK字段
[myProjectPath]\lib\site-packages\django\contrib\admin\options.py", line 812, in get_action_choices
choice = (name, description % model_format_dict(self.opts))
ValueError: incomplete format
這是我models.py（對相關車型）：
class NivelDePrecio(models.Model): # PriceLevel
# Fields
nombre = models.CharField(max_length=50)
slug = extension_fields.AutoSlugField(populate_from='nombre', blank=True)
valor = models.DecimalField(max_digits=7, decimal_places=4)
factor = models.DecimalField(max_digits=7, decimal_places=6, null=True, blank=True)
class Meta:
ordering = ('-valor',)
def __str__(self):
return self.nombre
def save(self, *args, **kwargs):
self.factor = 1/(1 - self.valor)
super(NivelDePrecio, self).save()
class Cotizacion(models.Model): # Quotation (master)
# Fields
nombre = models.CharField(max_length=100)
slug = extension_fields.AutoSlugField(populate_from='nombre', blank=True, overwrite=True)
fecha_ida = models.DateField(default=date.today)
fecha_regreso = models.DateField(default=date.today)
# Relationship Fields
itinerario = models.ForeignKey(Itinerario, on_delete=CASCADE, verbose_name='itinerario')
nivel_de_precio = models.ForeignKey(NivelDePrecio, verbose_name='nivel de precio',
on_delete=models.PROTECT, null=True, blank=True)
class Meta:
ordering = ('itinerario__cliente__codigo', '-fecha_ida')
def __str__(self):
return str(self.nombre)
class CotizacionDetalle(models.Model): # QuotationDetail (detail)
# Fields
descripcion = models.CharField(max_length=100, null=True, blank=True)
cantidad = models.DecimalField(max_digits=10, decimal_places=2)
costo = models.DecimalField(max_digits=10, decimal_places=2, default=0, editable=False)
monto = models.DecimalField(max_digits=10, decimal_places=2, default=0, editable=False)
markup = models.DecimalField(max_digits=6, decimal_places=4, default=0, editable=False)
utilidad = models.DecimalField(max_digits=6, decimal_places=4, default=0, editable=False)
total = models.DecimalField(max_digits=10, decimal_places=2, default=0, editable=False)
slug = extension_fields.AutoSlugField(populate_from='item', blank=True)
# Relationship Fields
cotizacion = models.ForeignKey(Cotizacion, on_delete=CASCADE, verbose_name='cotizacion', related_name='lineas')
item = models.ForeignKey(Item, verbose_name='item', related_name='item')
nivel_de_precio = models.ForeignKey(NivelDePrecio, verbose_name='nivel de precio',
on_delete=models.PROTECT, null=True, blank=True)
class Meta:
ordering = ('id',)
def save(self, *args, **kwargs):
self.descripcion = self.item.descripcion_venta
self.costo = self.item.costo
self.monto = self.cantidad * self.costo
if self.nivel_de_precio is None:
self.nivel_de_precio = self.cotizacion.nivel_de_precio
self.markup = Decimal(round(self.nivel_de_precio.factor - 1, 4)).quantize(Decimal("0.0000"))
self.utilidad = Decimal(self.nivel_de_precio.valor).quantize(Decimal("0.0000"))
self.total = Decimal(self.monto) * (1 + Decimal(self.markup))
super(CotizacionDetalle, self).save(*args, **kwargs)
def __str__(self):
return str(self.descripcion)
這是我admin.py：（我也曾嘗試用同樣導致錯誤的操作的註釋版本）。能夠從FK模型中爲這種變化選擇選項會很好，但我會通過兩個動作來解決它：一種是將標記值增加0.05％，另一種是將標記減少0.05％。我需要更新標記字段。
class CotizacionDetalleAdminForm(forms.ModelForm):
class Meta:
model = CotizacionDetalle
fields = ['item', 'cotizacion', 'cantidad', 'nivel_de_precio']
def cambiar_utilidad(modeladmin, request, queryset):
from .models import NivelDePrecio
ndp = NivelDePrecio.objects.get(id=5)
queryset.update(nivel_de_precio_id=ndp.id)
# for cd in queryset:
# cd.nivel_de_precio_id = ndp.id
# cd.save()
cambiar_utilidad.short_description = "Cambiar Utilidad 25%"
class CotizacionDetalleAdmin(admin.ModelAdmin):
# save_as = True
form = CotizacionDetalleAdminForm
list_display = ['cliente', 'itinerario', 'cotizacion', 'descripcion',
'cantidad', 'costo', 'monto', 'utilidad', 'markup', 'total']
list_display_links = ['descripcion']
readonly_fields = ['descripcion', 'costo', 'monto', 'utilidad', 'markup', 'total', 'slug', 'creado', 'actualizado']
search_fields = ['descripcion']
list_filter = (('cotizacion__itinerario__cliente', DropdownFilterRelated),
('cotizacion__itinerario', DropdownFilterRelated),
('cotizacion', DropdownFilterRelated),)
ordering = ['cotizacion__itinerario__cliente__codigo', 'cotizacion__fecha_ida', 'id']
actions = [cambiar_utilidad]
admin.site.register(CotizacionDetalle, CotizacionDetalleAdmin)
更新：
...嘗試這樣：
https://djangosnippets.org/snippets/1836/
在我admin.py
def create_action_nivel(nivel):
def action(modeladmin, request, queryset):
queryset.update(nivel_de_precio=nivel)
name = "change_to_%s" % (nivel.slug,)
return (name, (action, name, "Cambiar Nivel de Precio a: %s" % (nivel,)))
如下...
class CotizacionDetalleAdmin(admin.ModelAdmin):
def get_actions(self, request):
return dict(create_action_nivel(n) for n in NivelDePrecio.objects.all())
，但我得到了同樣的錯誤，這裏顯示回溯：http://dpaste.com/360GEJY
同樣的片段工作得很好時，現場更新不是外鍵字段。我用它在不同的模式和工作得很好：
def create_action_estatus(estatus):
def action(modeladmin, request, queryset):
queryset.update(estatus=estatus)
name = "mark_%s" % (estatus,)
return name, (action, name, "Cambiar Estatus: %s " % (estatus,))
class ItinerarioAdmin(admin.ModelAdmin):
def get_actions(self, request):
statuses= [ "Solicitado", "Cotizado", "Confirmado", "Facturado", "Cerrado"]
return dict(create_action_estatus(e) for e in statuses)