如何使用 DetailView 中 PK(主键)字段以外的不同字段进行查询
How to query using a different field other than the PK (primary key) field in DetailView
url.py
urlpatterns = [
url(r'^employee/(?P<emp_no>[0-9]+)/$', TitleDetail.as_view(), name='e-title'),
# /employee/10001/
]
views.py
class TitleDetail(DetailView):
model = Title
pk_url_kwarg = "emp_no"
def get_context_data(self, **kwargs):
context = super(TitleDetail, self).get_context_data(**kwargs)
context['title_list'] = Title.objects.filter(emp_no_id=self.kwargs['emp_no'])
return context
models.py
class Title(models.Model):
emp_no = models.ForeignKey(Employee)
title = models.CharField(max_length=50)
from_date = models.DateField()
to_date = models.DateField()
数据库中的示例数据:
id title from_date to_date emp_no_id
---------- --------------- ---------- ---------- ----------
1 Senior Engineer 1986-06-26 9999-01-01 10001
2 Staff 1996-08-03 9999-01-01 10002
为什么它给我
PAGE NOT FOUND: No title found matching the query.
你可以覆盖 get_object()
方法来做任何你想做的事:
def get_object(self, queryset=None):
queryset = self.get_queryset() if queryset is None else queryset
return get_object_or_404(queryset, emp_no_id=self.kwargs['emp_no'])
如果您以前没有看过,请参阅 get_object_or_404()
documentation。
事实上,您不必重写 get_object
方法,您需要做的只是像这样定义一个合适的 slug 字段(不是 pk_url_kwarg
):
class TitleDetail(DetailView):
model = Title
slug_field = "emp_no"
slug_url_kwarg = "emp_no"
here 是源代码,如果你想看看后面发生了什么。
url.py
urlpatterns = [
url(r'^employee/(?P<emp_no>[0-9]+)/$', TitleDetail.as_view(), name='e-title'),
# /employee/10001/
]
views.py
class TitleDetail(DetailView):
model = Title
pk_url_kwarg = "emp_no"
def get_context_data(self, **kwargs):
context = super(TitleDetail, self).get_context_data(**kwargs)
context['title_list'] = Title.objects.filter(emp_no_id=self.kwargs['emp_no'])
return context
models.py
class Title(models.Model):
emp_no = models.ForeignKey(Employee)
title = models.CharField(max_length=50)
from_date = models.DateField()
to_date = models.DateField()
数据库中的示例数据:
id title from_date to_date emp_no_id
---------- --------------- ---------- ---------- ----------
1 Senior Engineer 1986-06-26 9999-01-01 10001
2 Staff 1996-08-03 9999-01-01 10002
为什么它给我
PAGE NOT FOUND: No title found matching the query.
你可以覆盖 get_object()
方法来做任何你想做的事:
def get_object(self, queryset=None):
queryset = self.get_queryset() if queryset is None else queryset
return get_object_or_404(queryset, emp_no_id=self.kwargs['emp_no'])
如果您以前没有看过,请参阅 get_object_or_404()
documentation。
事实上,您不必重写 get_object
方法,您需要做的只是像这样定义一个合适的 slug 字段(不是 pk_url_kwarg
):
class TitleDetail(DetailView):
model = Title
slug_field = "emp_no"
slug_url_kwarg = "emp_no"
here 是源代码,如果你想看看后面发生了什么。