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class Server(models.Model):
client = models.ForeignKey(Client, on_delete=models.CASCADE)
...
class Schedule(models.Model):
client = models.ForeignKey(Client, on_delete=models.CASCADE)
...
class LineItem(models.Model):
schedule = models.ForeignKey(Schedule, on_delete=models.CASCADE)
server = models.ForeignKey(Server, blank=True, null=True)
...
我有些真是可惡的邏輯在我的模板,以顯示與給定服務器對象的服務器詳細信息頁面Django中,篩選查詢通過多個entry_set.all設置()關係
{% for schedule in server.client.schedule_set.all %}
{% for lineitem in schedule.lineitem_set.all %}
{% if lineitem.server == server %}
{{ lineitem.id }}
{{ lineitem.description }}
{% endif %}
{% endfor %}
{% endfor %}
任何了LineItem
UPDATE:澄清
我能夠從內部通過視圖與下列獲得相關信息:
def serverDetailView(request, pk):
# Fetches all the line items related to the current server
server = get_object_or_404(Server, pk=pk)
line_items = []
for schedule in server.client.schedule_set.all():
items = schedule.lineitem_set.all()
for item in items:
if item.server == server:
line_items.append(item)
context = {'server': server, 'line_items': line_items}
return render(request, 'reports/server_detail.html', context)
然後在模板:
{% for item in line_items %}
{{ item }}
{% endfor %}
的問題是,我可以過濾下來這些有關了LineItem與一個單一的查詢?
它實際上從未發生在我身上的雙下劃線符號來圓做這樣跟着
ForeignKey
關係!我明天工作到99%,這將是我所追求的。謝謝! –