前言

之前开发的系统需要用户自己上传截图用于审核，记录一下Django从前端接收图片到后台保存处理展示的整个过程

核心代码

包括前段上传表单的html代码、数据库模型、接收处理函数、后台展示

前端上传表单

form表单，需要注意的地方是enctype类型。必须是multipart/form-data。否则后端接收不到数据。

 <form class="form-horizontal" action="/customer/recharge/" id="recharge-form" method="post" enctype="multipart/form-data">
                        <div class="form-group">
                            <label class="col-sm-2 control-label">当前账号余额(USD)</label>

                            <div class="col-sm-10">
                                    <p class="form-control-static">{{ user.userprofile.usd_amount }}</p>
                            </div>
                        </div>
                        <div class="hr-line-dashed"></div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label">充值金额</label>
                            <div class="col-sm-10">
                                <input type="number" class="form-control" name="amount" id="amount" min="100" step='1' max="50000" required> <span class="help-block m-b-none">当前账号充值费率{{user.userprofile.recharge_percent|multiply:100}}%</span>
                            </div>
                        </div>

                        <div class="hr-line-dashed"></div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label">转账成功截图</label>
                            <div class="col-sm-10">
                                <input type="file" multiple="multiple" class="form-control" name="sucpic" id="sucpic" style="height:40px;" required> <span class="help-block m-b-none">向trx2.0地址:xxxxxxxxxxxx 转账成功的截图</span>
                            </div>
                        </div>

                        <div class="hr-line-dashed"></div>
                        <div class="form-group">
                            <div class="col-sm-4 col-sm-offset-2">
                                <button class="btn btn-success" type="submit" >确认</button>
                                <span class="btn btn-white" onclick="location.reload()">取消</span>
                            </div>
                        </div>
                     </form>

数据库模型

保存到数据库的字段模型

class RechargePic(models.Model):
    """
    用户充值截图
    """
    id = models.AutoField(primary_key=True)
    record = models.ForeignKey(BalanceRecord, on_delete=models.CASCADE)
    image = models.ImageField(upload_to='images/')
    created_at = models.DateTimeField(verbose_name='创建时间', auto_now_add=True)

    class Meta:
        verbose_name = '充值成功截图'
        verbose_name_plural = verbose_name

    def __str__(self):
        return f"{self.record.owner.username} - {self.record.id} - {self.record.amount}"

接收处理函数

Django接收前端html提交的表单，并处理表单数据，保存图片。

@login_required(login_url='/customer/login/')
@transaction.atomic
def customer_recharge(request):
    """
    用户充值
    """
    user = request.user

    #提示信息
    sta = 0
    msg = ''

    if request.method == 'POST':
        sucpic = request.FILES.get('sucpic')
        amount = request.POST.get('amount')

        if amount and sucpic:
            try:
                with transaction.atomic():
                    # 创建一条待审核充值记录
                    balancerecord = BalanceRecord.objects.create(
                        owner=user,
                        record_type=1,
                        amount=amount,
                        status=0,
                    )

                    #保存充值截图
                    rechargepic = RechargePic()
                    rechargepic.record=balancerecord
                    rechargepic.image=sucpic
                    rechargepic.save()

                    #结果提示
                    sta = 1
                    msg = '提交成功，等待管理员审核...'
            except Exception as e:
                logger.debug(e)
                sta = 2
                msg = '申请失败, 联系管理员'

    content = {
        'user': user,
        'sta': sta,
        'msg': msg,
    }

    return render(request, 'customer/recharge.html', content)

后台数据展示

用户上传的数据后台需要展示，并做出处理。这里指记录图片展示相关的部分

    #显示充值结果图
    @admin.display(description='充值截图', ordering='')
    def show_recharge_pic(self, obj):
        rechargepic = RechargePic.objects.get(record_id=obj.id)
        if rechargepic:
            html_str = '<a href="{img_url}" target="_blank">截图地址</a>'
            return format_html(html_str, img_url=rechargepic.image.url)
        else:
            return

项目设置

要想正常访问图片，还需要设置settings.py

#图片上传访问
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'