先看需求:(不想看的直接拉到最后)

 【需求说明】

6、如状态为上架时,库存为必填,下架状态时,库存为可填,前面无星号

实现方法:使用this.$set()和this.$delete()

上代码:

由于设计商业隐私,代码只上传一部分:
 

<el-form :model="commodityForm" ref="commodityForm" :rules="rules" label-width="120px">
      
        其他字段......

        <el-form-item label="上下架状态" prop="status">
          <el-switch
            v-model="commodityForm.status"
            :active-value="1"
            :inactive-value="0"
            @change="switchChange"
            >
          </el-switch>
        </el-form-item>
      </el-form>

表单data中原来的rules:

      // 表单校验
      rules:{
        name: [{ required: true, message: "请输入商品名称", trigger: ['blur','change']}],
        title: [{ required: true, message: "请输入商品标题", trigger: ['blur','change']}],
        commodityFormImg:[{ required: true, message: '请上传商品图片', trigger: 'change'}],
        typeId: [{ required: true, message: '请选择所属分类', trigger: 'change'}],
        brandId: [{ required: true, message: '请选择商品品牌', trigger: 'change'}],
        specification: [{ required: true, message: '请选择商品规格', trigger: ['blur','change']}],
        sellingPrice: [{ required: true, message: '请输入销售价', trigger: ['blur','change']}],
        // stock: [{ required: true, message: '请输入库存', trigger: ['blur','change']}],
        detail: [
          { required: true, message: "商品详情不能为空", trigger: "blur" },
          { validator: validateEditor, trigger: 'blur,change' }
        ]
      },

不添加上下架状态的rules

在change事件中进行判断:重点方法在这里!!!!!!!!!!

    // 上下架开关事件
    switchChange(e) {
       if(e != 1) {
        //删除校验的关键的两行代码(两行都要!!!!!!!!!!!!!!!)
        // 这个只能删除文字提示,但是星号还在,
        this.$refs["commodityForm"].clearValidate(["stock"]);
        // 这个只能删除星号提示,但是文字还在
        this.$delete(this.rules,'stock');
       }else{
         //添加校验代码(!!!!!!!!!!!!!!!)
        this.$set(this.rules,'stock',[{ required: true, message: '请输入库存', trigger:      
         ['blur','change']}])
       }
    }

动态添加删除rules

2023-1-29二更一个最新的方法:

 <el-form-item label="库存" prop="stock" :rules="commodityForm.status == 1 ? { required: true, message: '请输入库存', trigger: ['blur','change']} : {}">
          <el-input v-model.trim="commodityForm.stock" @input="commodityForm.stock = commodityForm.stock.replace(/[^\d]/g, '')" size="small" placeholder="请输入库存"></el-input>
        </el-form-item>

感谢我的好同事教我做事哈哈哈

 :rules="commodityForm.status == 1 ? { required: true, message: '请输入库存', trigger: ['blur','change']} : {}"

同时方法中的代码留一个:

   switchChange(e) {
       if(e != 1) {
        this.$refs["commodityForm"].clearValidate(["stock"]);
       }
    }

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