在django中注释单个模型实例(而不是queryset)

from django.db import models

class YourModel(models.Model):
    # 其他字段
    comment = models.TextField(blank=True, null=True)

from django.shortcuts import get_object_or_404

def comment_model_instance(request, pk):
    instance = get_object_or_404(YourModel, pk=pk)
    
    if request.method == 'POST':
        comment = request.POST.get('comment')
        instance.comment = comment
        instance.save()
        # 保存注释字段的值
        
    # 其他处理逻辑

<form method="post" action="{% url 'comment_model_instance' pk=instance.pk %}">
    {% csrf_token %}
    <textarea name="comment">{{ instance.comment }}</textarea>
    <button type="submit">保存注释</button>
</form>