el-form表单根据条件触发校验

<template>
  <div>
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm">

      <el-form-item label="活动区域" prop="resource">
        <el-radio-group v-model="ruleForm.resource">
          <el-radio :label="1">线上品牌商赞助</el-radio>
          <el-radio :label="2">线下场地免费</el-radio>
        </el-radio-group>
      </el-form-item>

      <el-form-item label="活动名称" prop="name" :required="this.ruleForm.resource === 1">
        <el-input v-model="ruleForm.name" class="w-220"></el-input>
      </el-form-item>
    </el-form>
    <el-button type="primary" @click="btn">提交</el-button>
  </div>
</template>

<script>
export default {
  data () {
    // 触发校验
    const validatePass = (rule, value, callback) => {
      if (this.ruleForm.resource === 1 && !value) {
        return callback(new Error('不能为空'));
      } else {
        callback()
      }
    }
    return {
      ruleForm: {
        resource: '',
        name: ''
      },
      rules: {
        resource: [
          { required: true, message: '请选择', trigger: 'change' }
        ],
        name: [
          { validator: validatePass, trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    //  提交
    btn () {
      this.$refs.ruleForm.validate((valid) => {
        if (valid) {
          console.log('成功')
        }
      })
    }
  }
}
</script>

<style>
</style>