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[英]django: related_name of self related ForeignKey field not working | get opposite direction of self reference in template
[英]django get count of 'children' of related_name field (and do this in template?)
我正在嘗試獲取總部(總部)現場經理的名單以及現場經理下的動物和代理人的數量。 每個外鍵都有一個相關的名稱。
型號是
class Fm(models.Model):
hq = models.ForeignKey(Hq, on_delete=models.SET_NULL,null=True)
fm = models.CharField(max_length=50)
class User(AbstractBaseUser):
email = models.EmailField(max_length=255,)
fm = models.ForeignKey(Fm,on_delete=models.SET_NULL,related_name="agents")
class Animal(models.Model):
agent = models.ForeignKey(User,on_delete=models.SET_NULL,related_name="animals")
farmer = models.CharField(max_length=50')
看法
def print_table(request):
fms = Fm.objects.all()
context = {'fms':fms}
return render(request, 'fm.html',context)
模板
{% for fm in fms %}
<tr>
<td>{{fm.hq}}</td>
<td>{{fm.fm}}</td>
<td>{{fm.agents.animals.all.count}}</td> (Error here)
<td>{{fm.agents.all.count}}</td>
</tr>
{% endfor %}
Expected OutPut
HQ FM_Name Animal_Count Agent_Count
HQ1 Any Name 10 (Not Working) 2
當前Output
HQ FM_Name Animal_Count Agent_Count
HQ1 Any Name 2
這是 Animal 的列表計數,但我需要所有的總和
{% for x in fm.agents.all %}
<div>{{x.animals.all.count}}</div><br>
{% endfor %}
任何人請幫助我
您可以將這樣的數據從視圖傳遞到模板
all_result = []
fms = Fm.objects.all()
for x in fms:
result = {}
result['fm']=x.fm
result['hq']=x.hq
result['zone']=x.hq.zone
result['age_count']= User.objects.filter(fm=x).count()
agents= User.objects.filter(fm=x)
result['animal_count']=Animal.objects.filter(agent__in=agents).count()
all_result.append(result)
它對我有用,如果您還有問題,請告訴我
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