vue、elment中el-table-column标签下el-link中无法绑定数据源问题_el-table-column el-link

1、问题如下,el-link中，如果不用prop属性，直接绑定字段不显示数据

        <div class="manifest">
            <h2 class="title">采购清单</h2>
            <el-table :data="tableData.demandPurchases" style="width: 100%">
                <el-table-column align="center" label="序号" type="index" width="60" />
                <el-table-column prop="itemName" label="物品名称" width="180" />
                <el-table-column prop="modelSpecification" label="规格型号" width="180" />
                <el-table-column prop="category" label="所属类目" />
                <el-table-column prop="quantity" label="采购数量" />
                <el-table-column prop="unit" label="计量单位" />
                <el-table-column prop="requirements" label="需求说明" />
                <el-table-column label="附件">
                        <el-link target="_black" :underline="false" :href="attachmentUrl" prop="attachmentName">
                            {{attachmentName}}.pdf
                        </el-link>
                </el-table-column>
            </el-table>
        </div>

2、需要加一层template，设置#default="scope"

        <div class="manifest">

            <h2 class="title">采购清单</h2>

            <el-table :data="tableData.demandPurchases" style="width: 100%">

                <el-table-column align="center" label="序号" type="index" width="60" />

                <el-table-column prop="itemName" label="物品名称" width="180" />

                <el-table-column prop="modelSpecification" label="规格型号" width="180" />

                <el-table-column prop="category" label="所属类目" />

                <el-table-column prop="quantity" label="采购数量" />

                <el-table-column prop="unit" label="计量单位" />

                <el-table-column prop="requirements" label="需求说明" />

                <el-table-column label="附件">

                    <template #default="scope">

                        <el-link target="_black" :underline="false" :href="scope.row.attachmentUrl" prop="attachmentName">

                            {{scope.row.attachmentName}}.pdf

                        </el-link>

                    </template>

                </el-table-column>

            </el-table>

        </div>