如何根据 Django 中另一个模型的值过滤查询集?

How to filter queryset based on value of another model in Django?

我正在尝试制作一个简单的搜索功能。我正在使用 User 模型和具有 OneToOne 关系的 UserProfile 模型。我已经成功地通过用户名、名字和姓氏进行搜索,所有三个字段都在 User 模型中。但是,我想按 UserProfile 模型中存在的字段进行过滤,例如性别、年龄、地点等

views.py

def Home(request):
    query = request.GET.get('query', '')
    queryset = User.objects.none()
    if request.method == "GET":
        form = SearchForm(request.GET)
        if form.is_valid():
            if query != '':
                queryset = User.objects.filter(Q(username__icontains=query)
                                             | Q(first_name__icontains=query)
                                             | Q(last_name__icontains=query)).exclude(is_staff=True)
    else:
        form = SearchForm()
    return render(request, "main/home.html", {'form': form, 'queryset': queryset})

home.html

{% extends "base.html" %}

{% block body %}
    <h3>Home</h3>
    <p>
    <form method="get" action="">
        {{ form.as_p }}

        <input type="submit" value="Search"/>
    </form>
    </p>

    <p>
    {% for user in queryset %}
        <a href="{% url 'main:profile' user.id %}">{{ user.get_full_name }}</a> <br/>
    {% endfor %}
    </p>
{% endblock %}

forms.py

class SearchForm(forms.Form):
    query = forms.CharField(max_length=100, label="", widget=forms.TextInput(attrs={'placeholder': 'Search...'}), required=False)
    age_from = forms.IntegerField(label="", widget=forms.NumberInput(attrs={'placeholder': 'Age from'}), required=False)
    age_to = forms.IntegerField(label="", widget=forms.NumberInput(attrs={'placeholder': 'Age to'}), required=False)

models.py

UserProfile(models.Model):
    sex_choices = (
        ('Male', 'Male'),
        ('Female', 'Female'),
        ('Other', 'Other'),
    )
    sex = models.CharField(max_length=6,
                           choices=sex_choices,
                           default='Male')
    birth_date = models.DateField()

如何在与 User 模型具有一对一关系的 UserProfile 模型上添加基于其他字段的搜索选项?

您需要使用相关名称。

由于您尚未共享模型定义,我们假设:

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    sex = models.CharField(...)
    ...

因此,当您查询时:

User.objects.filter(user_profile_set__sex='female')

编辑

要根据年龄进行查询,假设您在表单中要求 'age' 并在模型中存储生日,您可以尝试这样的操作:

from datetime import datetime
age = 18  # this shoudl come from form
birth_year = datetime.now().year - age
User.objects.filter(user_profile_set__birth_date__year=birth_year)