擅长:python、mysql、java
<p>从<a href="https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.formfield_for_foreignkey" rel="nofollow">documentation</a>:</p>
<blockquote>
<pre><code>ModelAdmin.formfield_for_foreignkey(db_field, request, **kwargs)¶
</code></pre>
<p>The formfield_for_foreignkey method on a ModelAdmin allows you to override the default formfield for a foreign keys field. For example, to return a subset of objects for this foreign key field based on the user:</p>
<pre><code>class MyModelAdmin(admin.ModelAdmin):
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == "car":
kwargs["queryset"] = Car.objects.filter(owner=request.user)
return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
</code></pre>
<p>This uses the HttpRequest instance to filter the Car foreign key field to only display the cars owned by the User instance.</p>
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