python保存文件到数据库

效果

model

class WEIGUI_IMG(Base):
    __tablename__ = 'DW_ZHS_D_WEIGUI_IMG'  # 表名
 
    id = Column('img_id', String(), primary_key=True)
    img_context = Column(LargeBinary)
    file_name = Column('file_name', String(), nullable=True)

后台路由

@api.route('/weigui/img', methods=['POST'])
def weigui_img():
    img = request.files['file']
    # img.save(img.filename)#直接保存为文件
    weigui_img = WEIGUI_IMG()
    weigui_img.id = str(uuid.uuid1()).replace('-','')
    weigui_img.img_context = img.read()
    weigui_img.file_name = img.filename
    img.close()
    db_session.add(weigui_img)
    db_session.commit()
    return jsonify({'msg': 'success'})

前端代码页面

                <el-form-item label="上传文件">
                    <el-upload action="http://10.0.0.49:9090/api/v1600/weigui/img" list-type="picture-card" :on-preview="handlePictureCardPreview" :on-remove="handleRemove">
                        <i class="el-icon-plus"></i>
                    </el-upload>
                </el-form-item>
 
        <el-dialog :visible.sync="dialogVisible" top="5vh">
            <img width="90%" :src="dialogImageUrl" alt="">
        </el-dialog>

前端代码js

                dialogImageUrl: '',
                dialogVisible: false,
 
            handleRemove(file, fileList) {
                console.log(file, fileList)
            },
            handlePictureCardPreview(file) {
                this.dialogImageUrl = file.url
                this.dialogVisible = true
            }

后续，编辑时取出所存图片

效果

发送请求

后台代码

需指定返回图片类型

@api.route('/weigui/img/<id>')
def weigui_img_by_id(id):
    textsql = "select * from dw_zhs_d_weigui_img t where t.img_id = :id"
    row = db_session.execute(textsql, {'id': id}).fetchone()
    return Response(row.img_context, mimetype="image/jpeg")

返回存进去的excel文件

# 获取excel测试
@api.route('/stream/excel')
def weigui_excel():
    obj = db_session.query(WEIGUI_IMG).filter(WEIGUI_IMG.file_name.like('%%%s%%' %'xls')).one()
    response = Response(obj.img_context, mimetype='text/csv')
    response.headers["Content-Disposition"] = "attachment; filename={}".format('1.xls')
    return response

前端js代码

            //显示编辑界面
            handleEdit: function (index, row) {
                this.editFormVisible = true
                this.editForm = Object.assign({}, row)
                this.filelist = []
                if(row.imgs){
                    let temp = row.imgs.split(',')
                    temp.pop()
                    temp.forEach(obj=>{
                        this.filelist.push({
                            name: '1.png',
                            url: this.imgUrl+'/'+obj
                        })
                    })
                }
            },

前端html代码

        <!--新增界面-->
        <el-dialog title="新增" v-model="addFormVisible" :close-on-click-modal="false">
            <el-form :model="addForm" label-width="80px" ref="addForm">
                <el-form-item label="企业名称">
                    <el-select v-model="addForm.company_id" filterable remote reserve-keyword placeholder="请输入企业名" :remote-method="remoteMethod" :loading="selectLoading" style="width: 250px">
                        <el-option v-for="item in options" :key="item.code" :label="item.name" :value="item.code"></el-option>
                    </el-select>
                </el-form-item>
                <el-form-item label="违规时间">
                    <el-date-picker v-model="addForm.weigui_time" style="width: 250px"></el-date-picker>
                </el-form-item>
                <el-form-item label="违规详情">
                    <el-input v-model="addForm.detail" auto-complete="off" type="textarea" autosize></el-input>
                </el-form-item>
                <el-form-item label="备注">
                    <el-input v-model="addForm.remark" auto-complete="off" type="textarea" autosize></el-input>
                </el-form-item>
                <el-form-item label="文件">
                    <el-upload :action="imgUrl" list-type="picture-card" :on-preview="handlePictureCardPreview" :on-remove="handleRemove" ref="uploader_add" :on-success="fileUploadAddSuccess">
                        <i class="el-icon-plus"></i>
                    </el-upload>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click.native="addFormVisible = false">取消</el-button>
                <el-button type="primary" @click.native="addSubmit" :loading="addLoading">提交</el-button>
            </div>
        </el-dialog>