<春招梳理>赫夫曼树,求带权路径

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<template> <div class="app-container"> <div class="title">面试记录管理</div> <div class="filter_container filter_containertop"> <el-input class="filter_item" v-model="listQuery.params.realName" @change="getInterviewLists" placeholder="请输入姓名" ></el-input> <el-select class="filter_item" v-model="listQuery.params.status" placeholder="请选择时间范围" @change="changeStatus" > <el-option label="当年春招" value="1"></el-option> <el-option label="当年秋招" value="2"></el-option> <el-option label="自定义时间" value="3"></el-option> </el-select> <el-date-picker :disabled="listQuery.params.status != '3'" class="filter_item2" @change="changeDate" type="daterange" value-format="yyyy-MM-dd" range-separator="至" start-placeholder="开始日期" end-placeholder="结束日期" v-model="listQuery.params.interviewTime" placeholder="" /> </div> <el-table :data="displayData" border :row-key="'id'" :expand-row-keys="expandedRowKeys" @expand-change="handleExpandChange" class="aligned-table" > <!-- 展开列 --> <el-table-column class="expand_column" type="expand"> <template #default="{ row }" > <!-- 子表 --> <el-table :data="row.otherRecords" :show-header="false" class="sub-table" > <!-- 占位列 --> <el-table-column width="50"></el-table-column> <el-table-column prop="studentName" label="学生名称" ></el-table-column> <el-table-column prop="remark" label="面试备注"></el-table-column> <el-table-column prop="company" label="面试公司"></el-table-column> </el-table> </template> </el-table-column> <!-- 主表列 --> <el-table-column prop="studentName" label="学生名称"></el-table-column> <el-table-column prop="remark" label="面试备注"></el-table-column> <el-table-column prop="company" label="面试公司"></el-table-column> </el-table> <pagination v-show="dataList.total > 0" :total="dataList.total" :page.sync="listQuery.current" :limit.sync="listQuery.size" @pagination="getInterviewLists" /> </div> </template> <script> import Pagination from "@/components/Pagination"; import { getInterviewList, saveInterview, updateInterview, deleteInterview, } from "@/api/student/student"; export default { name: "QuList", components: { Pagination, }, data() { return { dataList: { total: 0, records: [ { studentName: "张三", remark: "通过", company: "腾讯" }, { studentName: "张三", remark: "待定", company: "阿里" }, { studentName: "李四", remark: "未通过", company: "百度" }, { studentName: "李四", remark: "通过", company: "字节跳动" }, { studentName: "李四", remark: "通过", company: "美团" }, { studentName: "王五", remark: "通过", company: "京东" }, ], }, // 显示数据:只显示每个学生的第一条记录 displayData: [], // 存储所有学生的完整记录 groupedData: {}, // 控制展开的行 expandedRowKeys: [], msdialogVisible: false, msbjdialogVisible: false, jilu: "", listQuery: { current: 1, size: 10, params: { realName: "", interviewTime: "", }, }, form: { companyName: "", jobTitle: "", interviewTime: "", interviewRound: "", feedback: "", }, rules: { companyName: [ { required: true, message: "请输入公司名称", trigger: "blur" }, ], jobTitle: [ { required: true, message: "请输入岗位名称", trigger: "blur" }, ], interviewTime: [ { required: true, message: "请输入面试时间", trigger: "blur" }, ], interviewRound: [ { required: true, message: "请输入面试轮次", trigger: "blur" }, ], status: [ { required: true, message: "请选择面试状态", trigger: "change" }, ], // feedback: [ // { required: true, message: "请输入面试反馈", trigger: "blur" }, // ], }, // 数据加载标识 listLoading: false, }; }, mounted() { this.getInterviewLists(); this.processData(); }, computed: {}, methods: { changeStatus() { // 如果选择的是春招 if (this.listQuery.params.status == 1) { // 获取当前年 let year = new Date().getFullYear(); this.listQuery.params.interviewTime = [ `${year}-03-01`, `${year}-05-31`, ]; let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; } //如果选择秋招赋值为当年的7月1日到8月31日 else if (this.listQuery.params.status == 2) { // 获取当前年 let year = new Date().getFullYear(); this.listQuery.params.interviewTime = [ `${year}-07-01`, `${year}-08-31`, ]; let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; } else { this.listQuery.params.interviewTime = []; } console.log(this.listQuery.params.interviewTime); }, changeDate() { let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; console.log(start, end); }, getInterviewLists() { // this.listLoading = true; // getInterviewList(this.listQuery).then((res) => { // this.listLoading = false; // this.dataList = res.data; // }); }, // 预处理数据 processData() { const map = {}; const display = []; // 按学生姓名分组 this.dataList.records.forEach((record) => { if (!map[record.studentName]) { map[record.studentName] = []; } map[record.studentName].push(record); }); // 每个学生只显示第一条记录 for (const name in map) { const records = map[name]; display.push({ id: name, // 用作 row-key studentName: name, remark: records[0].remark, company: records[0].company, otherRecords: records.slice(1), // 从第二条开始为其他记录 }); } this.displayData = display; console.log(this.displayData); }, // 展开/折叠行时触发 handleExpandChange(row, expandedRows) { const index = this.expandedRowKeys.indexOf(row.id); if (index > -1) { this.expandedRowKeys.splice(index, 1); } else { this.expandedRowKeys.push(row.id); } }, }, }; </script> <style lang="scss" scoped> .cggreen { color: blue; cursor: pointer; } .interview_container { width: 100%; height: 100%; } .bottom { width: 100%; height: 130px; border: 1px solid black; } .bottoms { width: 100%; display: flex; justify-content: right; } .title { font-size: 20px; font-weight: bold; margin-bottom: 20px; } .filter_container { margin-bottom: 10px; } .filter_item { width: 180px; margin-right: 10px; } .filter_item2 { width: 380px; } ::v-deep .el-table__expand-column { width: 50px !important; } .sub-table ::v-deep .el-table__row .el-table__cell:nth-child(1) { width: 50px !important; border-right: none !important; } </style> el-table中 如果row.otherRecords没有数据 对应的父级不显示expand按钮
08-06
我发错了 最终代码是这样的 <template> <div class="app-container"> <div class="title">面试记录管理</div> <div class="filter_container filter_containertop"> <el-input class="filter_item" v-model="listQuery.params.realName" @change="getInterviewLists" placeholder="请输入姓名" ></el-input> <el-select class="filter_item" v-model="listQuery.params.status" placeholder="请选择时间范围" @change="changeStatus" > <el-option label="当年春招" value="1"></el-option> <el-option label="当年秋招" value="2"></el-option> <el-option label="自定义时间" value="3"></el-option> </el-select> <el-date-picker :disabled="listQuery.params.status != '3'" class="filter_item2" @change="changeDate" type="daterange" value-format="yyyy-MM-dd" range-separator="至" start-placeholder="开始日期" end-placeholder="结束日期" v-model="listQuery.params.interviewTime" placeholder="" /> </div> <el-table :data="displayData" border :row-key="'id'" :expand-row-keys="expandedRowKeys" @expand-change="handleExpandChange" class="aligned-table" > <!-- 展开列 --> <el-table-column type="expand"> <template #default="{ row }"> <el-table :data="row.otherRecords" :show-header="false" class="sub-table" > <!-- 占位列:匹配主表 expand 列宽度 --> <el-table-column width="50"></el-table-column> <el-table-column prop="studentName" label="学生名称" ></el-table-column> <el-table-column prop="remark" label="面试备注"></el-table-column> <el-table-column prop="company" label="面试公司"></el-table-column> </el-table> </template> </el-table-column> <!-- 主表列 --> <el-table-column prop="studentName" label="学生名称"></el-table-column> <el-table-column prop="remark" label="面试备注"></el-table-column> <el-table-column prop="company" label="面试公司"></el-table-column> </el-table> <pagination v-show="dataList.total > 0" :total="dataList.total" :page.sync="listQuery.current" :limit.sync="listQuery.size" @pagination="getInterviewLists" /> </div> </template> <script> import Pagination from "@/components/Pagination"; import { getInterviewList, saveInterview, updateInterview, deleteInterview, } from "@/api/student/student"; export default { name: "QuList", components: { Pagination, }, data() { return { dataList: { total: 0, records: [ { studentName: "张三", remark: "通过", company: "腾讯" }, { studentName: "张三", remark: "待定", company: "阿里" }, { studentName: "李四", remark: "未通过", company: "百度" }, { studentName: "李四", remark: "通过", company: "字节跳动" }, { studentName: "李四", remark: "通过", company: "美团" }, { studentName: "王五", remark: "通过", company: "京东" }, ], }, // 显示数据:只显示每个学生的第一条记录 displayData: [], // 存储所有学生的完整记录 groupedData: {}, // 控制展开的行 expandedRowKeys: [], msdialogVisible: false, msbjdialogVisible: false, jilu: "", listQuery: { current: 1, size: 10, params: { realName: "", interviewTime: "", }, }, form: { companyName: "", jobTitle: "", interviewTime: "", interviewRound: "", feedback: "", }, rules: { companyName: [ { required: true, message: "请输入公司名称", trigger: "blur" }, ], jobTitle: [ { required: true, message: "请输入岗位名称", trigger: "blur" }, ], interviewTime: [ { required: true, message: "请输入面试时间", trigger: "blur" }, ], interviewRound: [ { required: true, message: "请输入面试轮次", trigger: "blur" }, ], status: [ { required: true, message: "请选择面试状态", trigger: "change" }, ], // feedback: [ // { required: true, message: "请输入面试反馈", trigger: "blur" }, // ], }, // 数据加载标识 listLoading: false, }; }, mounted() { this.getInterviewLists(); this.processData(); }, computed: {}, methods: { changeStatus() { // 如果选择的是春招 if (this.listQuery.params.status == 1) { // 获取当前年 let year = new Date().getFullYear(); this.listQuery.params.interviewTime = [ `${year}-03-01`, `${year}-05-31`, ]; let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; } //如果选择秋招赋值为当年的7月1日到8月31日 else if (this.listQuery.params.status == 2) { // 获取当前年 let year = new Date().getFullYear(); this.listQuery.params.interviewTime = [ `${year}-07-01`, `${year}-08-31`, ]; let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; } else { this.listQuery.params.interviewTime = []; } console.log(this.listQuery.params.interviewTime); }, changeDate() { let start = this.listQuery.params.interviewTime[0]; let end = this.listQuery.params.interviewTime[1]; console.log(start, end); }, getInterviewLists() { // this.listLoading = true; // getInterviewList(this.listQuery).then((res) => { // this.listLoading = false; // this.dataList = res.data; // }); }, // 预处理数据 processData() { const map = {}; const display = []; // 按学生姓名分组 this.dataList.records.forEach((record) => { if (!map[record.studentName]) { map[record.studentName] = []; } map[record.studentName].push(record); }); // 每个学生只显示第一条记录 for (const name in map) { const records = map[name]; display.push({ id: name, // 用作 row-key studentName: name, remark: records[0].remark, company: records[0].company, otherRecords: records.slice(1), // 从第二条开始为其他记录 }); } this.displayData = display; }, // 展开/折叠行时触发 handleExpandChange(row, expandedRows) { const index = this.expandedRowKeys.indexOf(row.id); if (index > -1) { this.expandedRowKeys.splice(index, 1); } else { this.expandedRowKeys.push(row.id); } }, }, }; </script> <style lang="scss" scoped> .cggreen { color: blue; cursor: pointer; } .interview_container { width: 100%; height: 100%; } .bottom { width: 100%; height: 130px; border: 1px solid black; } .bottoms { width: 100%; display: flex; justify-content: right; } .title { font-size: 20px; font-weight: bold; margin-bottom: 20px; } .filter_container { margin-bottom: 10px; } .filter_item { width: 180px; margin-right: 10px; } .filter_item2 { width: 380px; } ::v-deep .el-table__expand-column { width: 50px !important; } .sub-table ::v-deep .el-table__row .el-table__cell:nth-child(1) { width: 50px !important; border-right: none !important; } </style> 在这个基础上修改
08-06
明白了,你现在使用的是一个 `expand` 列的 `el-table`,并且已经实现了数据的分组展示(主表展示第一个记录,子表展示其他记录)。 --- ### ✅ 你现在的核心需是: > **如果某行没有子数据(即 `row.otherRecords.length === 0`),就不显示 expand 列中的 `+/-` 按钮,而是显示一个空白单元格。** --- ## ✅ 解决方案 我们通过 **自定义 `type="expand"` 列的插槽内容**,来控制是否显示 `+/-` 按钮。 - ✅ 如果有子数据:显示默认的 `el-table-expand-cell`(包含 `+/-` 按钮); - ✅ 如果没有子数据:显示一个空的 `<div>` 或者直接不渲染 expand 内容。 --- ## ✅ 修改代码如下: ### ✅ 1. 修改 `el-table-column type="expand"` 插槽内容: ```vue <el-table-column type="expand"> <template #default="{ row }"> <!-- 只有存在子数据时才渲染 el-table-expand-cell --> <div v-if="row.otherRecords && row.otherRecords.length" class="el-table-expand-cell"> <span class="el-table__expand-column"> <el-table-expand-toggle :row="row" /> </span> </div> <!-- 无子数据时显示空单元格 --> <div v-else class="el-table-expand-cell"> <span class="el-table__expand-column"></span> </div> <!-- 子表 --> <el-table v-if="row.otherRecords && row.otherRecords.length" :data="row.otherRecords" :show-header="false" class="sub-table" > <!-- 占位列 --> <el-table-column width="50"></el-table-column> <el-table-column prop="studentName" label="学生名称"></el-table-column> <el-table-column prop="remark" label="面试备注"></el-table-column> <el-table-column prop="company" label="面试公司"></el-table-column> </el-table> </template> </el-table-column> ``` --- ### ✅ 2. 说明: | 内容 | 说明 | |------|------| | `<div class="el-table-expand-cell">` | Element UI 用来包裹 expand 按钮的容器 | | `<el-table-expand-toggle :row="row" />` | Element UI 的 expand 按钮组件,会自动处理展开/折叠逻辑 | | `v-if="row.otherRecords.length"` | 控制是否显示 expand 按钮 | | `v-else` | 没有子数据时,显示空白单元格,保持列结构一致 | --- ### ✅ 3. CSS 样式补充(保持样式一致): ```scss ::v-deep .el-table__expand-column { width: 50px !important; } ::v-deep .el-table__expand-column .el-table-expand-toggle { display: flex; justify-content: center; align-items: center; height: 100%; } ``` --- ### ✅ 4. 效果图(模拟) ``` | [+/-] | 学生名称 | 面试备注 | 面试公司 | |-------|----------|----------|----------| | [+] | 张三 | 通过 | 腾讯 | | | 李四 | 未通过 | 百度 | ← 无子数据,不显示按钮 | [-] | 张三 | 待定 | 阿里 | ``` --- ### ✅ 附加建议: - ✅ 如果你希望完全隐藏 expand 列的按钮和空白单元格,可以使用 `render-cell` 或 `custom-row` 控制整行样式; - ✅ 如果数据量大,可以考虑懒加载子表数据,即点击展开时才请接口; - ✅ 也可以通过 `row.isLeaf` 字段来自定义是否可展开(需配合 `tree-props`)。 --- ###
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