谷粒商城46 - 前端-商品服务-API-三级分类-基本修改效果完成

亦凉 2022-11-25 11:47 161阅读 0赞

### 文章目录 ###

*   *   *  需求
         *  新增修改的案例
         *  对弹框进行修改
         *  测试
         *  完整代码

### 需求 ###

树形结构上新增update 链接, 点击后, 弹窗回显分类信息 , 输入相关信息, 点击确定进行修改, 页面显示修改的数据.

### 新增修改的案例 ###

新增update修改的按钮, 用update方法接收数据  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70][]  
update方法中, 获取点击的修改的分类信息, 并且打开 分类修改的弹窗.  
向后端发送请求, 获取数据. 进行回显.  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 1][]

### 对弹框进行修改 ###

弹框的表单新增图标和计量单位 输入框. 用category.icon 和 category.productUnit 进行双向绑定.  
并且修改点击确定后的方法 为submitData方法  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 2][]  
submitData 方法如下, 根据是点击的append 还是 update , 去赋值 dialogType 的值, 调用添加分类或修改分类的方法.  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 3][]  
data中,定义了title 和 dialogType 根据新增和修改 动态的赋值  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 4][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 5][]  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 6][]  
![20200808173817499.png][]  
修改时, 点击确定后, 触发 editCategory 方法, **注意只提交要修改的数据和id , 不能提交其他数据, 否则数据库中会修改其他数据为默认值,导致数据丢失.**. 修改完成之后, 关闭弹窗, 重新获取分类, 重新显示勾选的分类.  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 7][]  
由于修改和添加共用的一个 表单, 因此在点击添加的append的时候, 要把绑定 的值初始化, 特别是catId 设置为null , 只有设置为null , 才代表新增.  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 8][]

### 测试 ###

点击了update进行了回显  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 9][]  
修改发送的请求  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 10][]  
回显  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 11][]  
测试新增  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 12][]  
测试新增  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 13][]  
新增发送的请求  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 14][]  
页面成功进行了新增  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzMjI5NjY5_size_16_color_FFFFFF_t_70 15][]

### 完整代码 ###

<template>
      <div>
        <el-tree
          :data="menus"
          :props="defaultProps"
          :expand-on-click-node="false"
          show-checkbox
          :default-expanded-keys="expandedkey"
          node-key="catId"
        >
          
    
          <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="update(data)">update</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>
    //这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）
    //例如：import 《组件名称》 from '《组件路径》';
    
    export default { 
      //import引入的组件需要注入到对象中才能使用
      components: { },
    
      data() { 
        return { 
          // 弹框的标题
          title: "",
          // 操作类型 是修改还是新增
          dialogType: "",
          //表单的值
          category: { 
            name: "",
            parentCid: 0,
            catLevel: 0,
            showStatus: 1,
            sort: 0,
            catId: null,
            productUnit: "",
            icon: "",
          },
          dialogVisible: false,
          menus: [],
          expandedkey: [],
          defaultProps: { 
            children: "children",
            label: "name",
          },
        };
      },
      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;
          });
        },
    
        //根据点击确定的类型, 判断是编辑还是增加
        submitData() { 
          if (this.dialogType == "add") { 
            this.addCategory();
          }
          if (this.dialogType == "update") { 
            this.editCategory();
          }
        },
    
        //点击按钮的修改
        update(data) { 
          this.dialogType = "update";
          this.title = "修改分类";
          console.log(" 要修改的数据 ", data);
          this.dialogVisible = true;
    
          //从后端查询要修改的分类数据
          this.$http({ 
            url: this.$http.adornUrl(`/product/category/info/${ data.catId}`),
            method: "get",
          }).then(({  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;
          });
        },
    
        //点击确定后,发送修改分类数据
        editCategory() { 
          //修改发送的数据. 注意只提交要修改的数据和id , 不能提交其他数据, 否则数据库中会修改其他数据为默认值,导致数据丢失.
          var {  catId, name, icon, productUnit } = this.category;
    
          this.$http({ 
            url: this.$http.adornUrl("/product/category/update"),
            method: "post",
            data: this.$http.adornData({  catId, name, icon, productUnit }, false),
          }).then(({  data }) => { 
            //添加成功后的操作
            this.$message({ 
              type: "success",
              message: "分类修改成功!",
            });
    
            this.getMenus();
            this.expandedkey = [this.category.parentCid];
            this.category.name = "";
            this.category.productUnit = "";
            this.category.icon = "";
            this.dialogVisible = false;
          });
        },
        //添加分类
        addCategory() { 
          //点击添加分类, 关闭表单
          this.dialogVisible = false;
          console.log("提交的表单数据: ", this.category);
    
          this.$http({ 
            url: this.$http.adornUrl("/product/category/save"),
            method: "post",
            data: this.$http.adornData(this.category, false),
          }).then(({  data }) => { 
            //添加成功后的操作
            this.$message({ 
              type: "success",
              message: "分类添加成功!",
            });
    
            this.getMenus();
            this.expandedkey = [this.category.parentCid];
            this.category.name = "";
          });
        },
    
        // 点击树形的 append, 触发的方法, data为点击的父节点数据
        append(data) { 
          console.log("append ", data);
    
          this.dialogType = "add";
    
          this.title = "添加分类";
          //点击 append 弹出添加分类的对话框
          this.dialogVisible = true;
          //父级的id
          this.category.parentCid = data.catId;
          //分类的层级, 当前层级, 加一
          this.category.catLevel = data.catLevel * 1 + 1;
    
    
          //赋初始化值 
          this.category.name = "";
          this.category.productUnit = "";
          this.category.icon = "";
          this.category.catId = null;
          this.category.sort = 0;
        },
    
        remove(node, data) { 
          //console.log("remove ", node, data);
    
          this.$confirm(`是否删除 [ ${ data.name} ] 菜单?`, "提示", { 
            confirmButtonText: "确定", // 点击确定, 触发then
            cancelButtonText: "取消", // 点击取消 触发 catch ,由于取消不需要任何的操作, 但删除catch会报错, 因此保留空方法
            type: "warning",
          })
            .then(() => { 
              var idArr = [data.catId];
    
              this.$http({ 
                url: this.$http.adornUrl("/product/category/delete"),
                method: "post",
                data: this.$http.adornData(idArr, false),
              }).then(({  data }) => { 
                this.$message({ 
                  type: "success",
                  message: "删除成功!",
                });
                //expandedkey = node.parent.data.catId;
                this.getMenus();
                this.expandedkey = [node.parent.data.catId];
              });
            })
            .catch(() => { });
        },
      },
      //监听属性 类似于data概念
      computed: { },
      //监控data中的数据变化
      watch: { },
      //方法集合
      //生命周期 - 创建完成（可以访问当前this实例） 组件创建完成就发送请求
      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. 页面被激活就会发送请求
    };
    </script>
    <style scoped>
    </style>

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