[JavaScript知识库]ElementUI表单组件，传值，索引传值；；组件传值

 <el-table
   :key="tableKey"
   v-loading="listLoading"  #决定列表是否处于加载状态的boolean值
   :data="list"   #数据绑定参数
   border  #是否有界限
   fit
   highlight-current-row
   style="width: 100%;"  # 宽度
   @sort-change="sortChange"  # 排序改变时触发的回调
 >

在这个标签内的元素就可以使用row代表每一行，
但是想在表单中显示则必须使用这种格式,下例中的一级标签标识的就是每一竖排的数据
lable表示表头数据名称，

<el-table-column label="" width="120" align="center">
        <template slot-scope="{row,$index}">  # 在行中插槽绑定row为每一行，并注入$index表示索引，可以在任意地方使用
          <el-button-group>
            <el-button size="mini" type="primary" icon="el-icon-edit" round />
            <el-button v-if="row.locked === 1" size="mini" type="info" icon="el-icon-lock" round @click="unLockUser(row.id,$index)" />
            <el-button v-if="row.locked === 0" size="mini" type="primary" icon="el-icon-lock" round @click="lockUser(row.id,$index)" />
          </el-button-group>
        </template>
      </el-table-column>

组件传值

创建了一个组件B，
要在父组件A引入他，同时用一个boolean控制B的展示；

方法：
在A中定义一个boolean控制组件的开关，并通过prop传值给组件，组件通过这个值决定是否渲染；
关闭时，父组件提供一个方法给子组件调用，父组件修改boolean值达到关闭的效果，
不要直接给改变子组件的值，会报错，。。没啥影响就是刷日志很烦

父组件调用开启

子组件调用关闭

子组件数据展示区的数值传递

由于这里是点击表单一行打开子组件展示
我不想在表单中为每一行都创建一个子组件，所以用了一个公用的组件，，，这里子组件就没法关联每一行的数据，只能在每一行点击事件触发的时候传递本行数据到一个方法，方法再改变boolean打开之前先将row数据写入公共变量，同时将公共变量传递给子组件，并且当关闭子组件的时候一定要清空临时区域的数据
每一行的打开按钮

打开方法和关闭方法

调用子组件

子组件绑定数据

复制粘贴代码部分

子组件

<template>
  <el-drawer
    title="我是标题"
    :visible.sync="show"
    :with-header="false"
    :before-close="handleClose"
  >
    {{ data }}
  </el-drawer>

</template>

<script>
import { translation } from '@/utils/translation'

export default {
  name: 'RightDrawer',
  props: {
    show: {
      type: Boolean,
      required: true
    },
    data: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      dictionary: {
        closeConfirm: 'Confirm to close?',
        cancel: 'Cancel',
        confirm: 'Confirm'
      },
      drawer: false
    }
  },
  created() {
    this.resetLanguage()
  },
  methods: {
    handleClose(done) {
      this.$confirm(this.closeConfirm)
        .then(rse => {
          this.$emit('closeRightDrawer')
        })
        .catch(res => {
          console.log('取消退出')
        })
    },
    resetLanguage() {
      for (const dictionaryKey in this.dictionary) {
        this.dictionary[dictionaryKey] = translation(dictionaryKey)
      }
    }
  }
}
</script>

<style scoped>

</style>

父组件

<template>
  <div class="app-container">
    <div class="filter-container" style="margin-bottom: 5px">
      <el-input
        v-model="listQuery.email"
        :placeholder="button.email"
        style="width: 200px;"
        class="filter-item"
        @keyup.enter.native="handleFilter"
      />
      <el-button
        v-waves
        style="margin-left: 12px"
        class="filter-item"
        type="primary"
        icon="el-icon-search"
        @click="handleFilter"
      >
        {{ button.search }}
      </el-button>
      <el-button
        class="filter-item"
        style="margin-left: 10px;"
        type="primary"
        icon="el-icon-edit"
        @click="handleCreate"
      >
        {{ button.add }}
      </el-button>
    </div>

    <el-table
      :key="tableKey"
      v-loading="listLoading"
      :data="list"
      border
      fit
      highlight-current-row
      style="width: 100%;"
      @sort-change="sortChange"
    >
      <el-table-column label="" width="120" align="center">
        <template slot-scope="{row,$index}">
          <el-button-group>
            <el-button size="mini" type="primary" icon="el-icon-edit" round @click="openRightDrawer(row)" />
            <el-button v-if="row.locked === 1" size="mini" type="info" icon="el-icon-lock" round @click="unLockUser(row.id,$index)" />
            <el-button v-if="row.locked === 0" size="mini" type="primary" icon="el-icon-lock" round @click="lockUser(row.id,$index)" />
          </el-button-group>
        </template>
      </el-table-column>
      <el-table-column
        label="id"
        prop="id"
        sortable="custom"
        align="center"
        width="180"
        :class-name="getSortClass('id')"
      >
        <template slot-scope="{row}">
          <span>{{ row.id }}</span>
        </template>
      </el-table-column>
      <el-table-column label="email" width="200px" align="center">
        <template slot-scope="{row}">
          <span>{{ row.email }}</span>
        </template>
      </el-table-column>
      <el-table-column label="fullName" width="140px" align="center">
        <template slot-scope="{row}">
          <span>{{ row.fullName }}</span>
        </template>
      </el-table-column>
      <el-table-column label="avatarUrl" width="120px" align="center">
        <template slot-scope="{row}">
          <el-image
            style="width: 70px; height: 70px"
            :src="row.avatarUrl"
            :preview-src-list="[row.avatarUrl]"
          />
        </template>
      </el-table-column>
      <el-table-column label="score" width="100px" align="center">
        <template slot-scope="{row}">
          <span>{{ row.score }}</span>
        </template>
      </el-table-column>
      <el-table-column label="frozenScore" width="110px" align="center">
        <template slot-scope="{row}">
          <span>{{ row.frozenScore }}</span>
        </template>
      </el-table-column>
      <el-table-column label="gender" width="85px" align="center">
        <template slot-scope="{row}">
          <el-tag :type="row.gender === 1 ?'danger':''" effect="dark">
            {{ row.gender === 1 ? 'woman' : 'man' }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column label="locked" width="85px" align="center">
        <template slot-scope="{row}">
          <el-tag :type=" row.locked === 1 ?'info':'success'">{{ row.locked === 1 ? 'locked' : 'unLock' }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="mobile" width="140px" align="center">
        <template slot-scope="{row}">
          <span>{{ row.mobile }}</span>
        </template>
      </el-table-column>
      <el-table-column label="birthday" width="250px" align="center">
        <template slot-scope="{row}">
          <span>
            <el-date-picker
              v-model="row.birthday"
              type="datetime"
              placeholder="birthday"
              disabled="disabled"
            />
          </span>
        </template>
      </el-table-column>
      <el-table-column label="created" width="250px" align="center">
        <template slot-scope="{row}">
          <span>
            <el-date-picker
              v-model="row.created"
              type="datetime"
              placeholder="created"
              disabled="disabled"
            />
          </span>
        </template>
      </el-table-column>
      <el-table-column label="vipExpiration" width="250px" align="center">
        <template slot-scope="{row}">
          <span>
            <el-date-picker
              v-model="row.vipExpiration"
              type="datetime"
              placeholder="vipExpiration"
              disabled="disabled"
            />
          </span>
        </template>
      </el-table-column>
      <el-table-column label="passWord" width="160px" align="center">
        <template slot-scope="{row}">
          <span>{{ tooLongString(row.passWord,12) }}</span>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="listQuery.pageNumber"
      :limit.sync="listQuery.limit"
      @pagination="getList"
    />

    <el-dialog :visible.sync="dialogPvVisible" title="Reading statistics">
      <el-table :data="pvData" border fit highlight-current-row style="width: 100%">
        <el-table-column prop="key" label="Channel" />
        <el-table-column prop="pv" label="Pv" />
      </el-table>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogPvVisible = false">Confirm</el-button>
      </span>
    </el-dialog>
    <div>
      <RightDrawer ref="rightDrawer" :show="showDrawer" :data="drawerData" @closeRightDrawer="closeRightDrawer" />
    </div>
  </div>
</template>

<script>
import { fetchPv, createArticle, updateArticle } from '@/api/article'
import { getUserList, lockUserById, unLockUserById } from '@/api/user'
import { translation } from '@/utils/translation'
import { tooLongStr } from '@/utils/string-utils'
import waves from '@/directive/waves' // waves directive
import { parseTime } from '@/utils'
import Pagination from '@/components/Pagination'
import { showMessage } from '@/utils/show-message'
import RightDrawer from '@/views/user/module/RightDrawer'

const calendarTypeOptions = [
  { key: 'CN', display_name: 'China' },
  { key: 'US', display_name: 'USA' },
  { key: 'JP', display_name: 'Japan' },
  { key: 'EU', display_name: 'Eurozone' }
]

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
  acc[cur.key] = cur.display_name
  return acc
}, {})

export default {
  name: 'ComplexTable',
  components: { RightDrawer, Pagination },
  directives: { waves },
  filters: {
    statusFilter(status) {
      const statusMap = {
        published: 'success',
        draft: 'info',
        deleted: 'danger'
      }
      return statusMap[status]
    },
    typeFilter(type) {
      return calendarTypeKeyValue[type]
    }
  },
  data() {
    return {
      button: {
        edit: 'Edit',
        search: 'Search',
        add: 'Add',
        cancel: 'Cancel',
        confirm: 'Confirm',
        email: 'Email'
      },
      showDrawer: false,
      drawerData: {},
      tableKey: 0,
      list: null,
      total: 0,
      listLoading: true,
      listQuery: {
        pageNumber: 1,
        pageSize: 20,
        email: ''
        /* importance: undefined,
        type: undefined,
        sort: '+id'*/
      },
      importanceOptions: [1, 2, 3],
      calendarTypeOptions,
      sortOptions: [{ label: 'ID Ascending', key: '+id' }, { label: 'ID Descending', key: '-id' }],
      statusOptions: ['published', 'draft', 'deleted'],
      temp: {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        type: '',
        status: 'published'
      },
      dialogFormVisible: false,
      dialogStatus: '',
      textMap: {
        update: 'Edit',
        create: 'Create'
      },
      dialogPvVisible: false,
      pvData: [],
      rules: {
        type: [{ required: true, message: 'type is required', trigger: 'change' }],
        timestamp: [{ type: 'date', required: true, message: 'timestamp is required', trigger: 'change' }],
        title: [{ required: true, message: 'title is required', trigger: 'blur' }]
      },
      downloadLoading: false
    }
  },
  created() {
    this.getList()
    this.resetLanguage()
  },
  methods: {
    tooLongString(str, length) {
      return tooLongStr(str, length)
    },
    // 锁定用户
    lockUser(userId, index) {
      lockUserById(userId).then(res => {
        showMessage(this, res)
        if (res.flag) {
          this.list[index].locked = 1
        }
      })
      // this.getList()
    },
    // 锁定用户
    unLockUser(userId, index) {
      unLockUserById(userId).then(res => {
        showMessage(this, res)
        if (res.flag) {
          this.list[index].locked = 0
        }
      })
      // this.getList()
    },
    // 加载list仅仅报错时展示响应结果
    getList() {
      this.listLoading = true
      getUserList(this.listQuery).then(response => {
        console.log(response)
        this.list = response.data.item
        this.total = response.data.total
        return true
      }).catch(res => {
        showMessage(this, res)
        return false
      })
      this.listLoading = false
    },
    // 搜索--需要展示响应提示
    search() {
      this.listLoading = true
      getUserList(this.listQuery).then(response => {
        console.log(response)
        this.list = response.data.item
        this.total = response.data.total
        showMessage(this, response)
      })
      this.listLoading = false
    },
    resetLanguage() {
      for (const buttonKey in this.button) {
        this.button[buttonKey] = translation(buttonKey)
      }
    },
    handleFilter() {
      this.listQuery.pageNumber = 1
      this.search()
    },
    // 打开右侧抽屉
    openRightDrawer(row) {
      console.log(row)
      this.drawerData = row
      this.showDrawer = true
    },
    // 关闭抽屉并清空对象数据
    closeRightDrawer() {
      this.showDrawer = false
      this.drawerData = { }
    },
    handleModifyStatus(row, status) {
      this.$message({
        message: '操作Success',
        type: 'success'
      })
      row.status = status
    },
    sortChange(data) {
      const { prop, order } = data
      if (prop === 'id') {
        this.sortByID(order)
      }
    },
    sortByID(order) {
      if (order === 'ascending') {
        this.listQuery.sort = '+id'
      } else {
        this.listQuery.sort = '-id'
      }
      this.handleFilter()
    },
    resetTemp() {
      this.temp = {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        status: 'published',
        type: ''
      }
    },
    handleCreate() {
      this.resetTemp()
      this.dialogStatus = 'create'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    createData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          this.temp.id = parseInt(Math.random() * 100) + 1024 // mock a id
          this.temp.author = 'vue-element-admin'
          createArticle(this.temp).then(() => {
            this.list.unshift(this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Created Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    handleUpdate(row) {
      this.temp = Object.assign({}, row) // copy obj
      this.temp.timestamp = new Date(this.temp.timestamp)
      this.dialogStatus = 'update'
      this.dialogFormVisible = true
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate()
      })
    },
    updateData() {
      this.$refs['dataForm'].validate((valid) => {
        if (valid) {
          const tempData = Object.assign({}, this.temp)
          tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
          updateArticle(tempData).then(() => {
            const index = this.list.findIndex(v => v.id === this.temp.id)
            this.list.splice(index, 1, this.temp)
            this.dialogFormVisible = false
            this.$notify({
              title: 'Success',
              message: 'Update Successfully',
              type: 'success',
              duration: 2000
            })
          })
        }
      })
    },
    handleDelete(row, index) {
      this.$notify({
        title: 'Success',
        message: 'Delete Successfully',
        type: 'success',
        duration: 2000
      })
      this.list.splice(index, 1)
    },
    handleFetchPv(pv) {
      fetchPv(pv).then(response => {
        this.pvData = response.data.pvData
        this.dialogPvVisible = true
      })
    },
    handleDownload() {
      this.downloadLoading = true
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['timestamp', 'title', 'type', 'importance', 'status']
        const filterVal = ['timestamp', 'title', 'type', 'importance', 'status']
        const data = this.formatJson(filterVal)
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: 'table-list'
        })
        this.downloadLoading = false
      })
    },
    formatJson(filterVal) {
      return this.list.map(v => filterVal.map(j => {
        if (j === 'timestamp') {
          return parseTime(v[j])
        } else {
          return v[j]
        }
      }))
    },
    getSortClass: function(key) {
      const sort = this.listQuery.sort
      return sort === `+${key}` ? 'ascending' : 'descending'
    }
  }
}
</script>

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