async validator 代码片段

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写校验的几种方式

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rules: {
      projectCode: [
        { required: true, message: '结算项目CODE不能为空' },
        { min: 5, max: 10, message: '长度在 5-10 个字符', trigger: 'blur' },
        { pattern: /^[_a-zA-Z0-9]+$/, message: '仅支持字母及数字，不区分大小写' }
      ],
      projectName: [
        { required: true, message: '结算项目名称不能为空' },
        { validator: this.validateProject, trigger: 'blur' }
      ],
      taxRate: [
        { required: true, message: '税率不能为空' },
      ],
      bizType: [
        { required: true, message: '业务类型不能为空' },
        { min: 5, max: 20, message: '长度在 5-20 个字符', trigger: 'blur' },
        { pattern: /^[_a-zA-Z0-9]+$/, message: '仅支持字母及数字，不区分大小写' }
      ],
      bizTypeDesc: [
        { min: 0, max: 40, message: '长度在 0-40 个字符', trigger: 'blur' }
      ],
      enableStatus:[
        { required: true, message: '状态不能为空' },
      ],
    }