javascript - iview 自定义列头显示内容 问题（快上车，准备发车了）

直接上图：

需求：列头 和 内容 都是从返回的数据中获取；
现在存在问题：当查询的结果为7条的时候，数据是可以显示（如上图所示）；但是当为一条结果的时候，解析就出问题；
代码：

<template>
<p>
    <Table  :columns="columnsa" border :data="data1"></Table>
</p>

</template>
<script>
export default {

data() {
    return {
        columnsa: [{
            title: '班次 / 日期',
            key: 'name',
            render: (h, params) => {
                return h('p', [
                    h('strong', params.row.name)
                ]);
            },
        }, {
            key: 'price1',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price1)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day1;
                return column
            }
        }, {
            key: 'price2',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price2)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day2;
                return column
            }
        }, {
            key: 'price3',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price3)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day3;
                return column
            }
        }, {
            key: 'price4',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price4)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day4;
                return column
            }
        }, {
            key: 'price5',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price5)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day5;
                return column
            }
        }, {
            key: 'price6',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price6)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day6;
                return column
            }
        }, {
            key: 'price7',
            render: (h, params) => {
                return h('p', [
                    h('Icon', {
                        props: {
                            type: 'social-yen'
                        }
                    }),
                    h('strong', params.row.price7)
                ]);
            },
            renderHeader: (column, index) => {
                let newIndex = index - 1
                column = this.data1[newIndex].day7;
                return column
            }
        }],
        // 数据
        data1: [{
            name: 'K1',
            day1: '06/24',
            price1: 168,
            day2: '06/25',
            price2: '',
            day3: '06/26',
            price3: 158,
            day4: '06/27',
            price4: 118,
            day5: '06/28',
            price5: '',
            day6: '06/29',
            price6: 198,
            day7: '06/30',
            price7: 699,
        }
        ]
    }
},
methods:{
  onRowClick(index){
    console.log(index);
  }
}

}
</script>

报错如图：

各位 有什么思路么