当我将数据发布到查询时,我正在执行以下操作:
fields = [
'name',
'surname',
'weight',
'height',
'position',
'agent',
'nationality',
'shirt_name',
'shirt_number',
'preferred_foot',
]
if request.method == 'POST':
filter_spec = None
for fld_name in fields:
value = request.POST.get(fld_name, None)
if value is not None:
if fld_name == 'position':
fld_name = 'position__in'
value = Position.objects.filter(name=value)
if fld_name == 'agent':
fld_name = 'entrepreneur__in'
value = Entrepreneur.objects.filter(name=value)
if filter_spec is None:
filter_spec = Q(**{fld_name: value})
else:
filter_spec &= Q(**{fld_name: value})
players = Player.objects.filter(filter_spec) if filter_spec else Player.objects.none()
result = [p.get_json() for p in players]
py_resp = {
'meta': {
'total_count': len(result),
},
'objects': result,
}
json_resp = json.dumps(py_resp)
return HttpResponse(json_resp, content_type='application/json')
定位查询如下:
Player.objects.filter(position__in=Position.objects.filter(name=positionpost))
所以我做了它,因为它在顶部,我无法在国籍的代码中实现它,因为查询是这样的:
Player.objects.filter(country__in=Country.objects.filter(nationality__in=Nationality.objects.filter(name='Espanhola')))
而且我不确定如何将其放在上面的代码中 有人可以帮帮我吗?
答案 0 :(得分:0)
您的查询都可以大大简化。第一个应该是:
Player.objects.filter(position__name=positionpost)
和第二个:
Player.objects.filter(country__nationality__name='Espanhola')
这些通常也会更有效率,因为它们正在进行JOIN而不是子查询。