如何在Django中从模板中的模型访问函数？

# myapp/templatetags/custom_tags.py
from django import template
from myapp.models import MyModel

register = template.Library()

@register.simple_tag
def get_model_function_value(model_id):
    model_instance = MyModel.objects.get(id=model_id)
    return model_instance.my_function()

{% load custom_tags %}

<!-- 使用自定义标签 -->
{% get_model_function_value my_model.id as function_result %}
<p>{{ function_result }}</p>

# myapp/models.py
from django.db import models

class MyModel(models.Model):
    # ... 其他字段 ...

    def my_function(self):
        # 执行一些逻辑
        return "函数的返回值"

<!-- 假设你已经将my_model对象传递给了模板 -->
<p>{{ my_model.my_function }}</p>