Django搜索空值，验证

# models.py
from django.db import models

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    age = models.IntegerField(null=True, blank=True)

# forms.py
from django import forms

class SearchForm(forms.Form):
    name = forms.CharField(required=False)

# views.py
from django.shortcuts import render
from .models import MyModel
from .forms import SearchForm

def search_view(request):
    form = SearchForm(request.GET)
    if form.is_valid():
        name = form.cleaned_data['name']
        results = MyModel.objects.filter(name__icontains=name, age__isnull=True)
        if results.exists():
            # 搜索结果不为空
            # 处理搜索结果
            pass
        else:
            # 搜索结果为空
            # 执行其他操作
            pass
    else:
        # 表单验证失败
        pass

    return render(request, 'search.html', {'form': form})