Element-UI 表单验证规则rules 配置参数说明以及判断日期开始时间不能早于结束时间

桃扇骨 2022-10-23 12:39 428阅读 0赞

**目录**

表单验证规则rules 配置参数说明

自定义校验规则

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## 表单验证规则rules 配置参数说明 ##

*  Form 组件提供了表单验证的功能，只需要通过 `rules` 属性传入约定的验证规则，并将 Form-Item 的 `prop` 属性设置为需校验的字段名即可。
 *  rules使用
    
        rules: { 
           name: [ 
                /*required 是否必填  
                  trigeer 触发检查的方式 blur 失去焦点时检查 change 值发生改变时触发*/
                { required: true, message: '请输入活动名称', trigger: 'blur' },
               
                /*type的用法 ,其它的使用请参考文档*/
                { type: 'date', required: true, message: '请选择日期', trigger: 'change' },
        
                /*使用正则*/
                {pattern:/^[a-z]+$/,message:'只能输入字母!'},
        
                /*自定义检查方法.checkfun ,
                  参数 rule, value, callback ,检测成功或不成功都需要手动调用callback , 
                  验证不成功时 callback(new Error('提示信息'))
                  注意 当在下面的对象中有message时则验证失败只会显示message的值 */
                { validator: checkfun, trigger: 'blur' }]
        }
    
     
 *  官网示例如下

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
      <el-form-item label="活动名称" prop="name">
        <el-input v-model="ruleForm.name"></el-input>
      </el-form-item>
      <el-form-item label="活动区域" prop="region">
        <el-select v-model="ruleForm.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai"></el-option>
          <el-option label="区域二" value="beijing"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="活动时间" required>
        <el-col :span="11">
          <el-form-item prop="date1">
            <el-date-picker type="date" placeholder="选择日期" v-model="ruleForm.date1" style="width: 100%;"></el-date-picker>
          </el-form-item>
        </el-col>
        <el-col class="line" :span="2">-</el-col>
        <el-col :span="11">
          <el-form-item prop="date2">
            <el-time-picker placeholder="选择时间" v-model="ruleForm.date2" style="width: 100%;"></el-time-picker>
          </el-form-item>
        </el-col>
      </el-form-item>
      <el-form-item label="即时配送" prop="delivery">
        <el-switch v-model="ruleForm.delivery"></el-switch>
      </el-form-item>
      <el-form-item label="活动性质" prop="type">
        <el-checkbox-group v-model="ruleForm.type">
          <el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
          <el-checkbox label="地推活动" name="type"></el-checkbox>
          <el-checkbox label="线下主题活动" name="type"></el-checkbox>
          <el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
        </el-checkbox-group>
      </el-form-item>
      <el-form-item label="特殊资源" prop="resource">
        <el-radio-group v-model="ruleForm.resource">
          <el-radio label="线上品牌商赞助"></el-radio>
          <el-radio label="线下场地免费"></el-radio>
        </el-radio-group>
      </el-form-item>
      <el-form-item label="活动形式" prop="desc">
        <el-input type="textarea" v-model="ruleForm.desc"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
        <el-button @click="resetForm('ruleForm')">重置</el-button>
      </el-form-item>
    </el-form>
    <script>
      export default {
        data() {
          return {
            ruleForm: {
              name: '',
              region: '',
              date1: '',
              date2: '',
              delivery: false,
              type: [],
              resource: '',
              desc: ''
            },
            rules: {
              name: [
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
              ],
              region: [
                { required: true, message: '请选择活动区域', trigger: 'change' }
              ],
              date1: [
                { type: 'date', required: true, message: '请选择日期', trigger: 'change' }
              ],
              date2: [
                { type: 'date', required: true, message: '请选择时间', trigger: 'change' }
              ],
              type: [
                { type: 'array', required: true, message: '请至少选择一个活动性质', trigger: 'change' }
              ],
              resource: [
                { required: true, message: '请选择活动资源', trigger: 'change' }
              ],
              desc: [
                { required: true, message: '请填写活动形式', trigger: 'blur' }
              ]
            }
          };
        },
        methods: {
          submitForm(formName) {
            this.$refs[formName].validate((valid) => {
              if (valid) {
                alert('submit!');
              } else {
                console.log('error submit!!');
                return false;
              }
            });
          },
          resetForm(formName) {
            this.$refs[formName].resetFields();
          }
        }
      }
    </script>

## 自定义校验规则 ##

let validateStartTime = (rule, value, callback) => {
            if (value === '') {
              callback(new Error('请输入活动开始时间'))
            } else {
              if (new Date(this.dataForm.startTime).getTime() <= new Date().getTime()) {
                callback(new Error('活动开始时间必须大于当前时间！'))
              } else {
                callback()
              }
            }
          }
          let validateEndTime = (rule, value, callback) => {
            if (value === '') {
              callback(new Error('请输入活动结束时间'))
            } else {
              if (
                new Date(this.dataForm.startTime).getTime() >=
                new Date(this.dataForm.endTime).getTime()
              ) {
                callback(new Error('活动结束时间必须大于活动开始时间！'))
              } else {
                callback()
              }
            }
          }
          return{
            dataRule: {
              startTime: [{
                trigger: 'blur',
                validator: validateStartTime
              }],
              endTime: [{
                trigger: 'blur',
                validator: validateEndTime
              }],
             
            },
          }