Resolving the Can't Read Object of Object Issue in Angular with JSON Files

Discover how to effectively use an object from a JSON file in your Angular application to overcome the `ngFor` limitations and display data seamlessly.
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Resolving the Can't Read Object of Object Issue in Angular with JSON Files

When building Angular applications, you might find yourself needing to read data from a JSON file. However, if the structure of your JSON data is not compatible with Angular’s ngFor directive, you may struggle to display the information as required. This guide will help you address a common problem: "I can't read the object of an object in a JSON file and use it in Angular." We will explore the solution to ensure you can efficiently render your JSON data onto the HTML template.

Understanding the Problem

[[See Video to Reveal this Text or Code Snippet]]

The Solution

To resolve this issue, you need to convert your JSON object into an array of keys that ngFor can properly iterate over. Below are simple steps to achieve this.

Step 1: Extracting the Object Keys

Code Implementation

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Using ngFor in Your HTML

Once you have the keys in an array, you can easily iterate through it using ngFor. Modify your HTML to reference the keys and access the corresponding objects.

HTML Implementation

[[See Video to Reveal this Text or Code Snippet]]

Explanation

*ngFor="let keyName of objectKeys": This iterates over that array of keys.

[tunnel]="objects[keyName]": This accesses the associated object using the current key.

[name]="objects[keyName]?.name": This safely retrieves the name property from the object using optional chaining (?.) to avoid potential undefined errors.

Conclusion

By performing these simple adjustments, you can successfully read your JSON object and utilize its properties in your Angular templates. Remember, ngFor requires an array for iteration, so converting your object’s keys is crucial. Now, you’ll be able to display each object’s properties smoothly in your Angular application, and your data presentation will become much more dynamic and user-friendly.

Feel free to reach out if you have any further questions or run into any issues!