Vue參數(shù)的增刪改實(shí)例詳解

更新時(shí)間：2022年03月01日 11:11:51 作者：季布，

這篇文章主要為大家詳細(xì)介紹了Vue參數(shù)的增刪改實(shí)例，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下，希望能夠給你帶來(lái)幫助

展示參數(shù)明細(xì)

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elementui Tag標(biāo)簽

在這里插入圖片描述

<el-table-column label="明細(xì)" type="expand">
              <template slot-scope="scope">
                  <!-- 循環(huán)渲染tag組件 參數(shù)明細(xì) -->
                <el-tag :key="i" v-for="(item,i) in scope.row.attr_vals" closable  @close="handleClose(scope.row,i)">
                  {{ item }}
                </el-tag>
                <!-- 輸入的文本框 -->
                <el-input class="input-new-tag" v-if="inputVisible" v-model="inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm" @blur="handleInputConfirm">
                </el-input>
                <!-- 添加的按鈕i -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput">+ New Tag</el-button>
              </template>

// 獲取分類參數(shù)的數(shù)據(jù)
    async getParamsData() {
      // 判斷是否選中三級(jí)分類,如果未選中則重新選中
      if (this.selectdKeys.length !== 3) {
        this.selectdKeys = []
        this.paramsData = []
        return
      }
      // 根據(jù)所選分類獲取動(dòng)態(tài)參數(shù)或者靜態(tài)屬性                    三級(jí)分類的id
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: {
          sel: this.activeName,
        },
      })
      if (res.meta.status !== 200) {
        return this.$message.error('獲取參數(shù)列表失敗')
      }
        //對(duì)參數(shù)的明細(xì)進(jìn)行處理:按空格拆分為數(shù)組
        res.data.forEach(item=>{
            item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        })
        console.log(res.data)
      this.paramsData = res.data
    },

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展示參數(shù)明細(xì)功能

inputVisible 控制輸入框的顯示

showInput

 // tag 標(biāo)簽 顯示文本輸入框
      inputVisible:false,

<!-- 輸入的文本框 -->
                <el-input class="input-new-tag" v-if="inputVisible" v-model="inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm" @blur="handleInputConfirm">
                </el-input>
                <!-- 添加的按鈕i -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput">+ New Tag</el-button>

// tag 顯示文本輸入框
    showInput(){
        this.inputVisible=true
    }

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輸入框太寬，修改下長(zhǎng)度

.input-new-tag{
    width: 120px;
}

但是現(xiàn)在會(huì)存在一個(gè)問(wèn)題，顏色和尺寸屬性應(yīng)該是獨(dú)立的互不產(chǎn)生影響才對(duì)，但是這里產(chǎn)生了關(guān)聯(lián)（點(diǎn)擊按鈕顏色和尺寸都會(huì)出現(xiàn)輸入框，如果輸入內(nèi)存也都會(huì)同時(shí)輸入）

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直接在data里面定義下面的屬性是不行的

// tag 標(biāo)簽顯示文本輸入框

inputVisible:false,

解決方法：可以在后端返回的參數(shù)數(shù)據(jù)里面加上該屬性，用以控制文本框的顯示和隱藏

//對(duì)參數(shù)的明細(xì)進(jìn)行處理:按空格拆分為數(shù)組
        res.data.forEach(item=>{
            item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
            item.inputVisible=false //控制文本框的顯示和隱藏
        })

這里的v-if 相當(dāng)于從該行數(shù)據(jù)中獲取該值用以控制

 <!-- 輸入的文本框 -->
<el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm" @blur="handleInputConfirm">

這是文本框輸入的值

v-model="scope.row.inputValue"

//對(duì)參數(shù)的明細(xì)進(jìn)行處理:按空格拆分為數(shù)組
        res.data.forEach(item=>{
            item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
            item.inputVisible=false //控制文本框的顯示和隱藏
            item.inputValue=''  // 文本框輸入的值
        })

這兩步的目的就是讓添加參數(shù)的按鈕輸入框互不產(chǎn)生影響

showInput(scope.row) 這里需要拿到參數(shù)對(duì)象

<!-- 添加的按鈕i -->
<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

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所以獲取到用戶輸入的參數(shù)后先添加到參數(shù)明細(xì)attr_vals中

row.attr_vals.push(row.inputValue.trim())

   // tag 顯示文本輸入框
    showInput(row){
        row.inputVisible=true
        this.$nextTick(_ => {
            // 點(diǎn)擊新增按鈕后  輸入框獲取焦點(diǎn) ref = saveTagInput
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    // 文本框失去焦點(diǎn)或按下enter 按鍵
    handleInputConfirm(row){
        if(row.inputValue.trim()){
            row.attr_vals.push(row.inputValue.trim())
            // 更新參數(shù)的明細(xì)
            this.updateParamsDetail(row)
        }
        row.inputVisible=false
    },
    // 更新參數(shù)的明細(xì)
    async updateParamsDetail(row){
        const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(',')
        })
        if(res.meta.status !== 200){
            return this.$message.error('更新參數(shù)明細(xì)失敗')
        }
        this.$message.success('更新參數(shù)明細(xì)成功!')
    }

這里失去焦點(diǎn)和執(zhí)行enter會(huì)觸發(fā)兩次事件，執(zhí)行兩次

 row.inputValue=''

// 文本框失去焦點(diǎn)或按下enter 按鍵
    handleInputConfirm(row){
        if(row.inputValue.trim()){
            row.attr_vals.push(row.inputValue.trim())
            // 更新參數(shù)的明細(xì)
            this.updateParamsDetail(row)
        }
        row.inputVisible=false
        // 執(zhí)行完一次(enter 或者失去焦點(diǎn)) 清空，這樣就不會(huì)執(zhí)行上面的if
        row.inputValue=''
    },

實(shí)現(xiàn)刪除參數(shù)明細(xì)功能

splice 方法

// 監(jiān)視tag標(biāo)簽的關(guān)閉事件,即刪除對(duì)應(yīng)的參數(shù)明細(xì)項(xiàng)
    handleClose(){
        row.attr_vals.splice(i,1)
        // 更新參數(shù)的明細(xì)
        this.updateParamsDetail(row)
    },

實(shí)現(xiàn)靜態(tài)屬性的更新

<el-table-column label="明細(xì)" type="expand">
              <template slot-scope="scope">
                  <!-- 循環(huán)渲染tag組件 參數(shù)明細(xì) -->
                <el-tag :key="i" v-for="(item,i) in scope.row.attr_vals" closable  @close="handleClose(scope.row,i)">
                  {{ item }}
                </el-tag>
                <!-- 輸入的文本框 -->
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)">
                </el-input>
                <!-- 添加的按鈕i -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>

只需要把動(dòng)態(tài)屬性的明細(xì) 復(fù)制到靜態(tài)屬性即可

完整代碼

<template>
  <div>
    <!-- 面包屑導(dǎo)航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首頁(yè)</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分類參數(shù)</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片試圖-->
    <el-card>
      <!-- 提示信息-->
      <el-alert title="注意：只允許為第三級(jí)分類設(shè)置相關(guān)參數(shù)!" type="warning" show-icon :closable="false"> </el-alert>
      <!-- 選擇商品分類-->
      <el-row class="cat_select">
        <el-col>
          <span>選擇商品分類：</span>
          <el-cascader v-model="selectdKeys" :options="cateList" :props="cascaderProps" @change="handleChange" clearable></el-cascader>
        </el-col>
      </el-row>

      <!-- tabs標(biāo)簽頁(yè)-->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="動(dòng)態(tài)參數(shù)" name="many">
          <el-button type="primary" size="mini" :disabled="btnDisabled" @click="addDialogVisible = true">添加參數(shù)</el-button>
          <el-table :data="paramsData" border stripe>
            <el-table-column label="明細(xì)" type="expand">
              <template slot-scope="scope">
                <!-- 循環(huán)渲染tag組件 參數(shù)明細(xì) -->
                <el-tag :key="i" v-for="(item, i) in scope.row.attr_vals" closable @close="handleClose(scope.row, i)">
                  {{ item }}
                </el-tag>
                <!-- 輸入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按鈕i -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column label="序號(hào)" type="index"></el-table-column>
            <el-table-column label="參數(shù)名稱" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">編輯</el-button>
                <el-button type="warning" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">刪除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="靜態(tài)屬性" name="only">
          <el-button type="primary" size="mini" :disabled="btnDisabled" @click="addDialogVisible = true">添加屬性</el-button>
          <el-table :data="paramsData" border stripe>
            <el-table-column label="明細(xì)" type="expand">
              <template slot-scope="scope">
                <!-- 循環(huán)渲染tag組件 參數(shù)明細(xì) -->
                <el-tag :key="i" v-for="(item, i) in scope.row.attr_vals" closable @close="handleClose(scope.row, i)">
                  {{ item }}
                </el-tag>
                <!-- 輸入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按鈕i -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column label="序號(hào)" type="index"></el-table-column>
            <el-table-column label="屬性名稱" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">編輯</el-button>
                <el-button type="warning" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">刪除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加對(duì)話框-->
    <el-dialog :title="'添加' + title" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="title" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams()">確 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改對(duì)話框-->
    <el-dialog :title="'修改' + title" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="title" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams()">確 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 分類列表
      cateList: [],
      // 級(jí)聯(lián)選擇器的屬性配置
      cascaderProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
      },
      //級(jí)聯(lián)選擇器選中的id數(shù)組
      selectdKeys: [],
      // 激活第幾個(gè)標(biāo)簽頁(yè)
      activeName: 'many',
      // 獲取參數(shù)屬性數(shù)據(jù)
      paramsData: [],

      // 添加參數(shù)對(duì)話框
      addDialogVisible: false,
      addForm: {},
      addFormRules: {
        attr_name: [{ required: true, message: '請(qǐng)輸入?yún)?shù)名稱', trigger: 'blur' }],
      },
      // 編輯參數(shù)對(duì)話框
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [{ required: true, message: '請(qǐng)輸入?yún)?shù)名稱', trigger: 'blur' }],
      },
    }
  },
  created() {
    this.getCateList()
  },

  methods: {
    // 獲取所有分類列表數(shù)據(jù)(因?yàn)闆](méi)有傳遞具體參數(shù))
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('獲取分類失敗')
      }
      this.cateList = res.data
    },
    // 監(jiān)聽級(jí)聯(lián)選擇器的改變事件
    handleChange() {
      this.getParamsData()
    },
    // 監(jiān)聽標(biāo)簽頁(yè)的點(diǎn)擊事件
    handleClick() {
      this.getParamsData()
    },
    // 獲取分類參數(shù)的數(shù)據(jù)
    async getParamsData() {
      // 判斷是否選中三級(jí)分類,如果未選中則重新選中
      if (this.selectdKeys.length !== 3) {
        this.selectdKeys = []
        this.paramsData = []
        return
      }
      // 根據(jù)所選分類獲取動(dòng)態(tài)參數(shù)或者靜態(tài)屬性                    三級(jí)分類的id
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: {
          sel: this.activeName,
        },
      })
      if (res.meta.status !== 200) {
        return this.$message.error('獲取參數(shù)列表失敗')
      }
      //對(duì)參數(shù)的明細(xì)進(jìn)行處理:按空格拆分為數(shù)組
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        item.inputVisible = false //控制文本框的顯示和隱藏
      })
      console.log(res.data)
      this.paramsData = res.data
    },

    // 監(jiān)聽添加對(duì)話框的關(guān)閉事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加參數(shù)
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加參數(shù)失敗')
        }
        this.addDialogVisible = false
        this.getParamsData()
        this.$message.success('添加參數(shù)成功')
      })
    },
    // 刪除參數(shù)
    removeParams(id) {
      this.$confirm('確定要?jiǎng)h除該參數(shù)嗎?', '提示', {
        confirmButtonText: '確定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
          if (res.meta.status !== 200) {
            return this.$message.error('刪除參數(shù)失敗')
          }
          this.getParamsData()
          this.$message.success('刪除參數(shù)成功')
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消刪除',
          })
        })
    },
    // 顯示編輯對(duì)話框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, {
        params: {
          attr_sel: this.activeName,
        },
      })
      if (res.meta.status !== 200) {
        return this.$message.error('查詢參數(shù)失敗')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 監(jiān)聽修改對(duì)話框的關(guān)閉事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改參數(shù)
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName,
          attr_vals: this.editForm.attr_vals,
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改參數(shù)名稱失敗')
        }
        this.editDialogVisible = false
        this.getParamsData()
        this.$message.success('修改參數(shù)名稱成功!')
      })
    },
    // 監(jiān)視tag標(biāo)簽的關(guān)閉事件,即刪除對(duì)應(yīng)的參數(shù)明細(xì)項(xiàng)
    handleClose() {
      row.attr_vals.splice(i, 1)
      // 更新參數(shù)的明細(xì)
      this.updateParamsDetail(row)
    },
    // tag 顯示文本輸入框
    showInput(row) {
      row.inputVisible = true
      this.$nextTick((_) => {
        // 點(diǎn)擊新增按鈕后  輸入框獲取焦點(diǎn) ref = saveTagInput
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 文本框失去焦點(diǎn)或按下enter 按鍵
    handleInputConfirm(row) {
      if (row.inputValue.trim()) {
        row.attr_vals.push(row.inputValue.trim())
        // 更新參數(shù)的明細(xì)
        this.updateParamsDetail(row)
      }
      row.inputVisible = false
      // 執(zhí)行完一次(enter 或者失去焦點(diǎn)) 清空，這樣就不會(huì)執(zhí)行上面的if
      row.inputValue = ''
    },
    // 更新參數(shù)的明細(xì)
    async updateParamsDetail(row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(','),
      })
      if (res.meta.status !== 200) {
        return this.$message.error('更新參數(shù)明細(xì)失敗')
      }
      this.$message.success('更新參數(shù)明細(xì)成功!')
    },
  },

  computed: {
    // 當(dāng)前選中的三級(jí)分類的id
    cateId() {
      return this.selectdKeys.length === 3 ? this.selectdKeys[2] : null
    },
    // 是否禁用按鈕
    btnDisabled() {
      return this.selectdKeys.length === 3 ? false : true
    },
    // 添加對(duì)話框標(biāo)題
    title() {
      return this.activeName === 'many' ? '動(dòng)態(tài)參數(shù)' : '靜態(tài)屬性'
    },
  },
}
</script>

<style lang="less" scoped>
.cat_select {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>