Question

我正在尝试在注册用户时验证验证码。查询有多个条件。如果返回了文档，则验证码将被验证，否则不会被验证。来自以下代码段的问题，尽管未返回文档，但始终满足if（foundUser）。

<template>
        <el-select
          v-model="selectTag.values"
          placeholder="select profiles"
          multiple
          collapse-tags
          filterable
          remote
          @change="values => handleSelectAll(values, 'routingProfile')"
          :filter-method="handleFilter"
        >
          <el-option
            v-for="option in selectTag.options"
            :key="option.value"
            :label="option.label"
            :value="option.value"
          >
          </el-option>
        </el-select>
</template>
<script>
import { Select, Option } from 'element-ui';

export default {
  props: {},
  components: {
    [Select.name]: Select,
    [Option.name]: Option
  },
  data() {
    return {
      selectTag: {
        prvsState: [],
        loading: false,
        count: 0,
        values: [],
        options: [
          { value: 'all', label: 'SELECT/DESELECT ALL' },
          { value: 'value1', label: 'label1' },
          { value: 'value2', label: 'label2' }
        ]
      }
    };
  },
  methods: {
  handleFilter(query) {
  var searchQuery = query.toLowerCase();
  var formField = this.selectTag;
  var fieldOptions = formField.options;
  var filterOptions = [{ value: 'all', label: 'Select/unselect all' 
  }];
  fieldOptions.forEach(option => {
    let optionLabel = option.label.toLowerCase();
    if (optionLabel.includes(searchQuery)) {
      filterOptions.push(option);
    }
  });
  formField.options = filterOptions;
},
    handleSelectAll(selectedValues) {
      var fieldOptions = this.selectTag.options;
      var prvsState = this.selectTag.prvsState;
      if (selectedValues.includes('all')) {
        if (prvsState.includes('all')) {
          this.selectTag.values = [];
          this.selectTag.prvsState = [];
        } else {
          this.selectTag.prvsState = selectedValues;
          this.selectTag.values = [];
          fieldOptions.forEach(option => {
            if (option.value != 'all') {
              this.selectTag.values.push(option.value);
            }
          });
        }
      } else {
        this.selectTag.values = selectedValues;
        this.selectTag.prvsState = selectedValues;
      }
    }
  }
};
</script>

Answer 1

foundUser可以用3种方式编写

  if (foundUser.length !== 0) {}
  if (!foundUser.length) {}
  if (foundUser.length > 0) {}

选择最适合您的一种。

我建议选择2号

UserModel
            .find({
                email,
                verificationCode: code
            },
            (err, foundUser) => {
                if(err) {
                    return res.json({msg: "Error"})
                }
                else {
                    console.log('foundUser', foundUser)
                    if (!foundUser.length) {
                        return res.json({msg: "found email + code"})
                    }
                    else {
                        return res.json({msg: "No email & code matched"})
                    }

                }
            })

猫鼬查找具有多个条件的查询

1 个答案: