我正在建立一個紋身店的網站。在我index看來，我首先顯示每個藝術家的所有紋身，但我試圖允許用戶按藝術家過濾紋身，然后使用 jquery/ajax 更新顯示所選藝術家紋身的頁面。
Artist和Tattoo型號：
class Artist(models.Model):
first_name = models.CharField(max_length=50)
last_name = models.CharField(max_length=50)
# etc
class Tattoo(models.Model):
artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
name = models.CharField(max_length=150)
image = models.ImageField(upload_to='images/')
date_created = models.DateTimeField(auto_now_add=True)
表格.py：
class FilterArtForm(ModelForm):
class Meta:
model = Tattoo
fields = ['artist']
widgets = {
'artist': forms.Select(attrs={'id': 'filter_by_artist'}),
}
視圖.py：
def index(request):
tattoos = Tattoo.objects.order_by('-date_created')
filter_art_form = FilterArtForm()
artist_id = request.GET.get('artist')
if artist_id:
artist = Artist.objects.get(pk = artist_id)
tattoos = tattoos.filter(artist=artist) # trying to return this as a JsonResponse is causing some kind of issue
return JsonResponse({'tattoos': model_to_dict(tattoos)}, status=200)
return render(request, 'core/index.html', {'tattoos':tattoos, 'filter_art_form': filter_art_form})
我是使用 ajax 的新手，所以我只是在搞亂我的視圖，如果我嘗試只回傳Artist這樣的物件：
def index(request):
tattoos = Tattoo.objects.order_by('-date_created')
filter_art_form = FilterArtForm()
artist_id = request.GET.get('artist')
if artist_id:
artist = Artist.objects.get(pk = artist_id)
return JsonResponse({'artist': model_to_dict(artist)}, status=200)
return render(request, 'core/index.html', {'tattoos':tattoos, 'filter_art_form': filter_art_form})
這將起作用，我將得到以下回應：
{"artist": {"id": 1, "first_name": "First", "last_name": "Last"}}
但是當我嘗試檢索Tattoo與所說相關的物件時，Artist我得到了這個'QuerySet' object has no attribute '_meta'錯誤。我認為這與ImageField模型有關，Tattoo或者與回傳多個物件而不僅僅是一個物件的事實有關，但我不確定。感謝您對此的任何幫助。
uj5u.com熱心網友回復：
像這樣試試
if artist_id:
tattoos = tattoos.filter(artist__id=artist_id).values()
return JsonResponse({'tattoos_by_artist': list(tattoos)}, status=200)
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