{
    "...": "...",
    "b": {
        "主食": [
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            },
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            },
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            }
        ],
        "副食": [
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            },
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            },
            {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
            }
        ]
    }
}

v-for item in data.b  key
item =>   [
    {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
    },
    {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
    },
    {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
    }
],
 v-for i in {}
 item => {searchValue: null, createBy: null, createTime: null, updateBy: null, updateTime: null, remark: null,…
},
{
    {i.id
    }
}