Django 实现用户需求及反馈系统并支持图片上传

from myapp.models import Userfrom django.db import models
class UserRequestImage(models.Model):    user_request = models.ForeignKey('UserRequest', related_name='images', on_delete=models.CASCADE)    image = models.ImageField(upload_to='user_requests/')    uploaded_at = models.DateTimeField(auto_now_add=True)
class UserFeedbackImage(models.Model):    user_feedback = models.ForeignKey('UserFeedback', related_name='images', on_delete=models.CASCADE)    image = models.ImageField(upload_to='user_feedbacks/')    uploaded_at = models.DateTimeField(auto_now_add=True)
class UserRequest(models.Model):    """用户需求表"""    PRIORITY_CHOICES = [        (1, '非常低'),        (2, '低'),        (3, '常规'),        (4, '高'),        (5, '非常高'),    ]    STATUS_CHOICES = (        (1, '待处理'),        (2, '处理中'),        (3, '已完成'),    )    title = models.CharField(max_length=255, verbose_name='需求标题')    description = models.TextField(verbose_name='需求描述')    user = models.ForeignKey('User', on_delete=models.CASCADE, verbose_name='用户')    priority = models.IntegerField(choices=PRIORITY_CHOICES, default=2, verbose_name='优先级')    status = models.IntegerField(choices=STATUS_CHOICES, default=1, verbose_name='状态')    progress = models.IntegerField(default=0, verbose_name='进度')  # 新增进度字段    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')    updated_at = models.DateTimeField(auto_now=True, verbose_name='更新时间')
class UserFeedback(models.Model):    """用户反馈建议表"""    FEEDBACK_TYPE_CHOICES = (        (1, '建议'),        (2, '问题'),        (3, '其他'),    )    STATUS_CHOICES = (        (1, '待处理'),        (2, '处理中'),        (3, '已完成'),    )    content = models.TextField(verbose_name='反馈内容')    user = models.ForeignKey('User', on_delete=models.CASCADE, verbose_name='用户')    feedback_type = models.IntegerField(choices=FEEDBACK_TYPE_CHOICES, default=1, verbose_name='反馈类型')    status = models.IntegerField(choices=STATUS_CHOICES, default=1, verbose_name='状态')    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')    updated_at = models.DateTimeField(auto_now=True, verbose_name='更新时间')

from django import formsfrom myapp.models import UserRequest, UserFeedback, UserRequestImage, UserFeedbackImage
class UserRequestForm(forms.ModelForm):    class Meta:        model = UserRequest        fields = ['title', 'description', 'priority']
class UserRequestImageForm(forms.ModelForm):    class Meta:        model = UserRequestImage        fields = ['image']
class UserFeedbackForm(forms.ModelForm):    class Meta:        model = UserFeedback        fields = '__all__'
class UserFeedbackImageForm(forms.ModelForm):    class Meta:        model = UserFeedbackImage        fields = ['image']

from django.http import JsonResponse, HttpResponseBadRequestfrom django.views.decorators.csrf import csrf_exemptfrom django.core.exceptions import ValidationError
# 定义最大文件大小限制（3MB）MAX_TOTAL_FILE_SIZE = 3 * 1024 * 1024
@csrf_exemptdef create_user_request(request):    if request.method == 'POST':        userid = request.session["info"].get('id')        form = UserRequestForm(request.POST)        if form.is_valid():            # 创建但不保存 UserRequest 实例            user_request = form.save(commit=False)            # 设置用户ID            user_request.user_id = userid            # 保存 UserRequest 实例            user_request.save()
            images = request.FILES.getlist('images[]')            total_size = sum(image.size for image in images)
            # 检查总大小是否超过限制            if total_size > MAX_TOTAL_FILE_SIZE:                res_data = {                    "status": 1,                    "msg": "总文件大小超过3MB的限制。",                    "data": {}                }                return JsonResponse(res_data, status=400)
            for image in images:                UserRequestImage.objects.create(user_request=user_request, image=image)            res_data = {                "status": 0,                "msg": "用户请求创建成功。",                "data": {}            }            return JsonResponse(res_data, status=201)                res_data = {            "status": 1,            "msg": f"{form.errors}",            "data": {}        }        return JsonResponse(res_data, status=400)        res_data = {        "status": 1,        "msg": "无效请求方法",        "data": {}    }    return JsonResponse(res_data, status=400)