谷粒商城 (十四) --------- 商品服务 API 三级分类 ⑤ 修改分类、批量修改、批量删除

向右看齐 2024-04-07 13:48 58阅读 0赞

#### 目录 ####

*  前言
 *  一、编写前端
 *  二、后端修改
 *  三、测试

--------------------

## 前言 ##

此部分大部分是前端的编写，主要实现的功能有对分类进行(批量)修改、拖拽修改菜单的顺序、批量的删除，主要是 Element UI 组件用的比较多。。。，建议观看此部分的视频

--------------------

## 一、编写前端 ##

关于前端的编写比较杂乱，在此我们只贴出代码，不再进行解释。当然，代码中有部分的解释。

<template>
      <div>
        <el-switch
          v-model="draggable"
          active-text="开启拖拽"
          inactive-text="关闭拖拽"
        ></el-switch>
        <el-button v-if="draggable" @click="batchSave">批量保存</el-button>
        <el-button type="danger" @click="batchDelete">批量删除</el-button>
        <el-tree
          :data="menus"
          :props="defaultProps"
          :expand-on-click-node="false"
          show-checkbox
          node-key="catId"
          :default-expanded-keys="expandedKey"
          :draggable="draggable"
          :allow-drop="allowDrop"
          @node-drop="handleDrop"
          ref="menuTree"
        >
          <span class="custom-tree-node" slot-scope="{ node, data }">
            <span>{
        {
         node.label }}</span>
            <span>
              <el-button
                v-if="node.level <= 2"
                type="text"
                size="mini"
                @click="() => append(data)"
                >Append</el-button
              >
              <el-button type="text" size="mini" @click="edit(data)"
                >edit</el-button
              >
              <el-button
                v-if="node.childNodes.length == 0"
                type="text"
                size="mini"
                @click="() => remove(node, data)"
                >Delete</el-button
              >
            </span>
          </span>
        </el-tree>
    
        <el-dialog
          :title="title"
          :visible.sync="dialogVisible"
          width="30%"
          :close-on-click-modal="false"
        >
          <el-form :model="category">
            <el-form-item label="分类名称">
              <el-input v-model="category.name" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="图标">
              <el-input v-model="category.icon" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="计量单位">
              <el-input
                v-model="category.productUnit"
                autocomplete="off"
              ></el-input>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="submitData">确 定</el-button>
          </span>
        </el-dialog>
      </div>
    </template>
    
    <script>
    export default {
        
      //import引入的组件需要注入到对象中才能使用
      components: {
        },
      props: {
        },
      data() {
        
        return {
        
          pCid: [],
          draggable: false,
          updateNodes: [],
          maxLevel: 0,
          title: "",
          dialogType: "", //edit,add
          category: {
        
            name: "",
            parentCid: 0,
            catLevel: 0,
            showStatus: 1,
            sort: 0,
            productUnit: "",
            icon: "",
            catId: null,
          },
          dialogVisible: false,
          menus: [],
          expandedKey: [],
          defaultProps: {
        
            children: "children",
            label: "name",
          },
        };
      },
    
      //计算属性 类似于data概念
      computed: {
        },
      //监控data中的数据变化
      watch: {
        },
      //方法集合
      methods: {
        
        getMenus() {
        
          this.$http({
        
            url: this.$http.adornUrl("/product/category/list/tree"),
            method: "get",
          }).then(({
          data }) => {
        
            console.log("成功获取到菜单数据...", data.data);
            this.menus = data.data;
          });
        },
        batchDelete() {
        
          let catIds = [];
          let checkedNodes = this.$refs.menuTree.getCheckedNodes();
          console.log("被选中的元素", checkedNodes);
          for (let i = 0; i < checkedNodes.length; i++) {
        
            catIds.push(checkedNodes[i].catId);
          }
          this.$confirm(`是否批量删除【${
          catIds}】菜单?`, "提示", {
        
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
          })
            .then(() => {
        
              this.$http({
        
                url: this.$http.adornUrl("/product/category/delete"),
                method: "post",
                data: this.$http.adornData(catIds, false),
              }).then(({
          data }) => {
        
                this.$message({
        
                  message: "菜单批量删除成功",
                  type: "success",
                });
                this.getMenus();
              });
            })
            .catch(() => {
        });
        },
        batchSave() {
        
          this.$http({
        
            url: this.$http.adornUrl("/product/category/update/sort"),
            method: "post",
            data: this.$http.adornData(this.updateNodes, false),
          }).then(({
          data }) => {
        
            this.$message({
        
              message: "菜单顺序等修改成功",
              type: "success",
            });
            //刷新出新的菜单
            this.getMenus();
            //设置需要默认展开的菜单
            this.expandedKey = this.pCid;
            this.updateNodes = [];
            this.maxLevel = 0;
            // this.pCid = 0;
          });
        },
        handleDrop(draggingNode, dropNode, dropType, ev) {
        
          console.log("handleDrop: ", draggingNode, dropNode, dropType);
          //1、当前节点最新的父节点id
          let pCid = 0;
          let siblings = null;
          if (dropType == "before" || dropType == "after") {
        
            pCid =
              dropNode.parent.data.catId == undefined
                ? 0
                : dropNode.parent.data.catId;
            siblings = dropNode.parent.childNodes;
          } else {
        
            pCid = dropNode.data.catId;
            siblings = dropNode.childNodes;
          }
          this.pCid.push(pCid);
    
          //2、当前拖拽节点的最新顺序，
          for (let i = 0; i < siblings.length; i++) {
        
            if (siblings[i].data.catId == draggingNode.data.catId) {
        
              //如果遍历的是当前正在拖拽的节点
              let catLevel = draggingNode.level;
              if (siblings[i].level != draggingNode.level) {
        
                //当前节点的层级发生变化
                catLevel = siblings[i].level;
                //修改他子节点的层级
                this.updateChildNodeLevel(siblings[i]);
              }
              this.updateNodes.push({
        
                catId: siblings[i].data.catId,
                sort: i,
                parentCid: pCid,
                catLevel: catLevel,
              });
            } else {
        
              this.updateNodes.push({
         catId: siblings[i].data.catId, sort: i });
            }
          }
    
          //3、当前拖拽节点的最新层级
          console.log("updateNodes", this.updateNodes);
        },
        updateChildNodeLevel(node) {
        
          if (node.childNodes.length > 0) {
        
            for (let i = 0; i < node.childNodes.length; i++) {
        
              var cNode = node.childNodes[i].data;
              this.updateNodes.push({
        
                catId: cNode.catId,
                catLevel: node.childNodes[i].level,
              });
              this.updateChildNodeLevel(node.childNodes[i]);
            }
          }
        },
        allowDrop(draggingNode, dropNode, type) {
        
          //1、被拖动的当前节点以及所在的父节点总层数不能大于3
    
          //1）、被拖动的当前节点总层数
          console.log("allowDrop:", draggingNode, dropNode, type);
          //
          this.countNodeLevel(draggingNode);
          //当前正在拖动的节点+父节点所在的深度不大于3即可
          let deep = Math.abs(this.maxLevel - draggingNode.level) + 1;
          console.log("深度：", deep);
    
          //   this.maxLevel
          if (type == "inner") {
        
            // console.log(
            //   `this.maxLevel：${this.maxLevel}；draggingNode.data.catLevel：${draggingNode.data.catLevel}；dropNode.level：${dropNode.level}`
            // );
            return deep + dropNode.level <= 3;
          } else {
        
            return deep + dropNode.parent.level <= 3;
          }
        },
        countNodeLevel(node) {
        
          //找到所有子节点，求出最大深度
          if (node.childNodes != null && node.childNodes.length > 0) {
        
            for (let i = 0; i < node.childNodes.length; i++) {
        
              if (node.childNodes[i].level > this.maxLevel) {
        
                this.maxLevel = node.childNodes[i].level;
              }
              this.countNodeLevel(node.childNodes[i]);
            }
          }
        },
        edit(data) {
        
          console.log("要修改的数据", data);
          this.dialogType = "edit";
          this.title = "修改分类";
          this.dialogVisible = true;
    
          //发送请求获取当前节点最新的数据
          this.$http({
        
            url: this.$http.adornUrl(`/product/category/info/${
          data.catId}`),
            method: "get",
          }).then(({
          data }) => {
        
            //请求成功
            console.log("要回显的数据", data);
            this.category.name = data.data.name;
            this.category.catId = data.data.catId;
            this.category.icon = data.data.icon;
            this.category.productUnit = data.data.productUnit;
            this.category.parentCid = data.data.parentCid;
            this.category.catLevel = data.data.catLevel;
            this.category.sort = data.data.sort;
            this.category.showStatus = data.data.showStatus;
            /**
             *         parentCid: 0,
            catLevel: 0,
            showStatus: 1,
            sort: 0,
             */
          });
        },
        append(data) {
        
          console.log("append", data);
          this.dialogType = "add";
          this.title = "添加分类";
          this.dialogVisible = true;
          this.category.parentCid = data.catId;
          this.category.catLevel = data.catLevel * 1 + 1;
          this.category.catId = null;
          this.category.name = "";
          this.category.icon = "";
          this.category.productUnit = "";
          this.category.sort = 0;
          this.category.showStatus = 1;
        },
    
        submitData() {
        
          if (this.dialogType == "add") {
        
            this.addCategory();
          }
          if (this.dialogType == "edit") {
        
            this.editCategory();
          }
        },
        //修改三级分类数据
        editCategory() {
        
          var {
         catId, name, icon, productUnit } = this.category;
          this.$http({
        
            url: this.$http.adornUrl("/product/category/update"),
            method: "post",
            data: this.$http.adornData({
         catId, name, icon, productUnit }, false),
          }).then(({
          data }) => {
        
            this.$message({
        
              message: "菜单修改成功",
              type: "success",
            });
            //关闭对话框
            this.dialogVisible = false;
            //刷新出新的菜单
            this.getMenus();
            //设置需要默认展开的菜单
            this.expandedKey = [this.category.parentCid];
          });
        },
        //添加三级分类
        addCategory() {
        
          console.log("提交的三级分类数据", this.category);
          this.$http({
        
            url: this.$http.adornUrl("/product/category/save"),
            method: "post",
            data: this.$http.adornData(this.category, false),
          }).then(({
          data }) => {
        
            this.$message({
        
              message: "菜单保存成功",
              type: "success",
            });
            //关闭对话框
            this.dialogVisible = false;
            //刷新出新的菜单
            this.getMenus();
            //设置需要默认展开的菜单
            this.expandedKey = [this.category.parentCid];
          });
        },
    
        remove(node, data) {
        
          var ids = [data.catId];
          this.$confirm(`是否删除【${
          data.name}】菜单?`, "提示", {
        
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
          })
            .then(() => {
        
              this.$http({
        
                url: this.$http.adornUrl("/product/category/delete"),
                method: "post",
                data: this.$http.adornData(ids, false),
              }).then(({
          data }) => {
        
                this.$message({
        
                  message: "菜单删除成功",
                  type: "success",
                });
                //刷新出新的菜单
                this.getMenus();
                //设置需要默认展开的菜单
                this.expandedKey = [node.parent.data.catId];
              });
            })
            .catch(() => {
        });
    
          console.log("remove", node, data);
        },
      },
      //生命周期 - 创建完成（可以访问当前this实例）
      created() {
        
        this.getMenus();
      },
      //生命周期 - 挂载完成（可以访问DOM元素）
      mounted() {
        },
      beforeCreate() {
        }, //生命周期 - 创建之前
      beforeMount() {
        }, //生命周期 - 挂载之前
      beforeUpdate() {
        }, //生命周期 - 更新之前
      updated() {
        }, //生命周期 - 更新之后
      beforeDestroy() {
        }, //生命周期 - 销毁之前
      destroyed() {
        }, //生命周期 - 销毁完成
      activated() {
        }, //如果页面有keep-alive缓存功能，这个函数会触发
    };
    </script>
    <style scoped>
    </style>

## 二、后端修改 ##

后台方法有少量的修改，主要是为了与前端的吻合

![在这里插入图片描述][b33c0e362c6b40b0abfc51d76c53ed2c.png]

新增批量修改的方法。。。。

![在这里插入图片描述][13a3c695762245509cb708df7b983fee.png]

## 三、测试 ##

![在这里插入图片描述][b3ad0ac36b494087a763b1517421a970.png]  
![在这里插入图片描述][6fc46b75859b44a9892090bb33919155.png]  
![在这里插入图片描述][fcc3757f5d784affba0a607c4292237d.png]

[b33c0e362c6b40b0abfc51d76c53ed2c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/12dcc8335af9448b87a74202561f6659.png
[13a3c695762245509cb708df7b983fee.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/4ad322e5721a477d8c7be3bca3281332.png
[b3ad0ac36b494087a763b1517421a970.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/fd5ff8c34d59413bbc2420da0e113335.png
[6fc46b75859b44a9892090bb33919155.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/6b2c0d7ad87e4c6cb16aadd343170a2b.png
[fcc3757f5d784affba0a607c4292237d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/2583beae789a4121a24c26789756da9e.png