Showing information in a complex nested structure with Angular

Html

<div ng-controller="topicController">
     <a href="#/dashboard">Dashboard</a> | <a href="#/topics">Topics</a> | <a href="#/users">Users</a>

    <h4>{{topic.user_name}} posted a topic</h4>

    <h2>{{topic.topic}}</h2>
    <h4>Description: {{topic.description}}</h4>
    <div ng-controller="postController">
        <label>Post Your Answer here</label>
            <form>
                <textarea name="post" ng-model="new_post.post"></textarea>
                <input type='submit' value='Submit' ng-click='addPost(users._id, topic._id, users.name)'>
            </form>

            <div ng-repeat="x in topic.posts">
                <h4>{{x.post}}</h4>
                <p>Likes:{{x.up_vote}} Dislikes:{{x.down_vote}}</p>
                <ul ng-repeat="i in topic.posts[x].comments">
                    <li>{{topic.posts[x].comments[i].comment}}</li>
                </ul>
                <div ng-controller="commentController">
                <form>
                        <textarea name="comment" ng-model="model.comment"></textarea><br>
                        <input type="submit" value="Submit" ng-click="addComment(users._id, x._id, users.name)">
                </form>
            </div>
        </div>
    </div>
</div>

Upon reviewing the information presented below, it is evident that all data items are correctly populated within the Topic Object, including topic Posts and comments nested within posts.

While the display of topics and posts works seamlessly as intended in my HTML page, challenges arise when attempting to showcase the associated comments.

Despite successfully adding comments to the database, they remain invisible on the frontend. A visual representation depicting the entire object from my console is attached for reference.

Could the issue lie within the ng-repeat function implementation?

Answer №1

The y value you're working with is actually a message entity, not an identifier. Therefore, your nested v-for loop should look like this:

<ul v-for="m in y.messages">
    <li>{{m.text}}</li>
</ul>

Answer №2

It seems there is a confusion regarding the representation of x within your ng-repeat for handling comments. Remember, x refers to each individual comment object in the comments array associated with the post. Therefore, using topic.posts[x] does not make sense and should simply be replaced with x.

To clarify, it would be more appropriate to rename it as comment rather than sticking with x.

Additionally, it is recommended to always include a track by statement in your ng-repeat expressions to enhance performance. In this scenario, you can consider utilizing track by comment._id.

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