Utilizing Realm Results in a React Native ListView

I've been working on creating a react-native ListView that displays the results fetched from Realm. I've been following tutorials on how to use react-native's ListView with Realm, but I keep running into the same issue.

Whenever I try to render the data, I get an error message stating:

Objects are not valid as a React child (found: [object Results]). If you meant to render a collection of children, use an array instead or wrap the object using createFragment(object) from the React add-ons. Check the render method of 'Text'.

Based on my understanding of the Realm documentation and other resources, the Results object is supposed to act like a standard JavaScript list and should be accepted by the cloneWithRows method.

If anyone can provide some guidance on what I might be doing incorrectly or how to resolve this issue, I would greatly appreciate it.

P.S. I've tried using both react-native's ListView and Realm's ListView, but the problem persists.

import React, { Component } from 'react';
import {
    StyleSheet,
    View,
    Text,
    Navigator,
    TouchableHighlight,
    TouchableOpacity,
    //ListView,
} from 'react-native';
import { ListView } from 'realm/react-native';

import realm from './myrealm'

class contextview extends Component {
    getState() {
        console.log("getInitialState");
        var ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
        let pictures = [ realm.objects('picture').filtered('new == true') ];
        console.log("pictures: " + pictures);
        return {
            //dataSource: ds.cloneWithRows(['row 1', 'row 2', 'row 3']),
            dataSource: ds.cloneWithRows(pictures)
        };
    }

    constructor(props)
    {
        super(props);
        this.state = this.getState();
        this.bindMethods();
    }

    render() {
      return (
        <ListView
          dataSource={this.state.dataSource}
          renderRow={(rowData) => <Text>{rowData}</Text>}
        />
      );
    }
}

Answer №1

Have you encountered this issue while using the cloneWithRows function? If that's the case, it might be necessary to apply the cloneWithRows function to a snapshot of the Realm.Results object when utilizing the Realm.ListView. You can refer to the implementation in the Realm example here. Therefore, consider using the Realm.ListView and adjust your code as follows:

let pictures = [ realm.objects('picture').filtered('new == true').snapshot() ];

Answer №2

The source of the issue was located within my render method.

Instead of:

render() {
  return (
    <ListView
      dataSource={this.state.dataSource}
      renderRow={(rowData) => <Text>{rowData}</Text>}
    />
  );
}

The correct approach would have been:

render() {
  return (
    <ListView
      dataSource={this.state.dataSource}
      renderRow={(rowData) => <Text>{rowData.path}</Text>}
    />
  );
}

As the rowData was an object, ReactNative was unable to render it within a Text element.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What is the best way to extract all "conditions" nested under the key "logic" at the 0th index in a JSON object?

I need to manipulate a nested object by removing every "condition" where the key is "logic" and the value is 0 from it. Here is an example of the object structure: Original input: [ { "conditions": [ { "logic": "AND", "paramet ...

ES6: Utilizing tagged templates for embedding nested HTML elements

Currently in the process of familiarizing myself with JavaScript and testing out its tagged template literals feature. <p> Handlebars? Tagged template literals? <span> That is a question. </span> </p> The above snippet showcases ...

Encounter an error parsing the package.json file. Confirmed that it is valid JSON

As I embark on creating my very first yeoman generator, I have encountered an issue when running yo to initiate the project. The error message I am receiving is as follows: npm ERR! install Couldn't read dependencies npm ERR! Darwin 14.0.0 npm ERR! a ...

In my programming world, 'i' is a mysterious being - always undefined, except when it decides

Currently, I am utilizing Vue, Vuedraggable, and Vuetify in my project. I have encountered an issue where I am unable to use 'let' to define the index for my loop as it always returns undefined. Strangely, using 'var' instead of ' ...

Implementing Pagination or Infinite Scroll to Instagram Feed

Currently, I am working on creating an Instagram feed for a fashion campaign where users can hashtag their photos with a specific tag. Using the Instagram API, the script will pull all recent posts with this common tag to display on the webpage. Instagram ...

Script on Tampermonkey executed prior to page loading

I am facing a challenge with hiding a specific section from an HTML page: <h1 data-ng-show="!menuPinned &amp;&amp; !isSaaS" class="logo floatLeft" aria-hidden="false"><span>XXX&nbsp;</span><span style="font-weight: bold;"& ...

The for loop is throwing an error because the variable 'i' is not defined

I recently started using eslint and I'm in the process of updating my code to comply with my eslint configuration. module.exports = { env: { browser: true, commonjs: true, node: true, es2021: true, }, extends: 'eslint:recomm ...

Utilize flexbox to create a list that is displayed in a column-reverse layout

I am facing a challenge in displaying the latest chat person in the 1st position (active) using Firebase. Unfortunately, Firebase does not have a date field which makes it difficult to achieve this. I have attempted converting the date into milliseconds an ...

Should we pass <script> tags or unsanitized values to the Handlebars layout?

How can I pass values to handlebars that are not sanitized upon output? For instance, I want to ensure that when using the code res.render('index', {script: '<script src="bundle.js"></script>'}), it is not rendered as {{scri ...

Guide to Implementing npm Package 'latlon-geohash' in Angular 7

I'm encountering an issue while attempting to utilize the latlon-geohash npm package within my Angular 7 application. When I execute it, I encounter the following error... ERROR TypeError: latlon_geohash__WEBPACK_IMPORTED_MODULE_8__.encode is not ...

What is the best way to integrate Google Analytics into a Next.js application without the need for an _app.js or _document.js file?

I'm encountering some challenges while trying to incorporate Google Analytics into my Next.js application. One issue I'm facing is the absence of an _app.js or _document.js file in the project structure. Additionally, I notice that when I include ...

What is the best way to send the accurate data type from PHP to Javascript?

My approach involves using the jQuery post method to insert a record in MySQL. The issue I'm facing is that when comparing the output of the PHP using ==, all three conditionals function correctly. However, with ===, the first two conditionals return ...

Is there a way to display these panels in a scrollable table layout?

My aim is to replicate this specific styling: https://i.stack.imgur.com/jz5lm.png This type of table shown above is being dynamically imported via Redux: class LocationList extends React.Component { componentDidMount() { this.props.fetchLocations( ...

Transferring files via Bluetooth on PhoneGap

As someone new to phonegap, I'm interested in transferring text files from one device to another using Bluetooth within the platform. I've looked at several examples but haven't found a solution yet. I've come across some examples that ...

Fade in images using jQuery

I am having issues with fading in and out images using jQuery, it doesn't seem to be working as expected. I think there might be something crucial that I am missing. Take a look at the script below: var count = 1; setInterval(function() { ...

Display JSON data in AngularJS and show the corresponding data on the right side when clicked

I'm brand new to using AngularJS and I've been struggling with this issue. Take a look at the code snippet below to see what I mean. The titles are shown on the left, and when you click on one, I want the corresponding body to display on the righ ...

Experiencing Challenges with JavaScript Implementation Within an HTML Document

Code: <!DOCTYPE html> <head> <script type="text/javascript" src="jquery-3.3.1.js"> </script> <script type="text/javascript"> $(function() { alert("Hello World"); }); </script> <meta charset ...

Is the params object sorted by $http in AngularJS?

Currently, I am in the process of writing unit tests for my AngularJS application. In order to perform these tests, I am utilizing the $httpBackend to mock the $http request internally. During the testing phase, I make use of $httpBackend.expectGET to ens ...

Cross-Origin Request Sharing (CORS) problem encountered while making an API call with

My current challenge involves calling an API that returns data in XML format as a response. While testing the .htm file on my local machine, I encountered the following error. https://i.stack.imgur.com/FsvZ0.png Similarly, running it from the codepen.io ...

Is a webpage's sluggishness in Internet Explorer due to its lengthy page structure causing issues while loading quickly on other browsers?

My application has a page that is particularly long, around 8Mb of source HTML mainly comprised of tables. I am aware that this indicates poor architecture, but unfortunately, I am unable to make immediate changes due to certain constraints. In most brows ...