React native 无法从领域数据库架构获取值

我正在使用react native和realm作为DB创建一个访客管理应用程序。 为了添加访问者，我使用带有各种文本字段的PopUpDialog。 一个是Headercomponent，标题和“+”用于显示弹出窗口

export const TodoSchema = {
    name: TODO_SCHEMA,
    primaryKey: 'id',
    properties: {
        id: 'int',    // primary key
        name: { type: 'string', indexed: true },
        age: { type: 'string', indexed: true },
        reason: { type: 'string', indexed: true },
        address: { type: 'string', indexed: true },
        visitorid: { type: 'string', indexed: true },
        visitingperson: { type: 'string', indexed: true },
        number: { type: 'string', indexed: true },
        done: { type: 'bool', default: false }
    }
};
export const TodoListSchema = {
    name: TODOLIST_SCHEMA,
    primaryKey: 'id',
    properties: {
        id: 'int',    // primary key
        name: 'string',
        creationDate: 'date',
        exitDate: 'date',
        todos: { type: 'list', objectType: TODO_SCHEMA }
    }
};

现在在主组件中，我正在尝试获取creationDate的值，它是未定义的，任何建议都是好的

MainComponent.js的代码

Imports required for components

import React, { Component } from 'react';
import { View, FlatList, Text, TouchableOpacity, StyleSheet, Alert } from 'react-native';
import { updateTodoList, deleteTodoList, queryAllTodoLists } from '../databases/allSchemas';
import realm from '../databases/allSchemas';
import Swipeout from 'react-native-swipeout';

import HeaderComponent from './HeaderComponent';
import PopupDialogComponent from './PopupDialogComponent';

let FlatListItem = props => {
    const { itemIndex, id, name, creationDate, exitDate, popupDialogComponent, onPressItem } = props;

在这里，我试图从db creationdate、name、id中获取对象，并将其返回为未定义