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Learn how to efficiently delete related Eloquent relationships in Laravel, ensuring related data is properly removed when deleting records.
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This video is based on the question https://stackoverflow.com/q/63578502/ asked by the user 'Nistha Adhikari' ( https://stackoverflow.com/u/8889490/ ) and on the answer https://stackoverflow.com/a/63578702/ provided by the user 'Naveed Ali' ( https://stackoverflow.com/u/10183434/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Delete Related Eloquent Relationships in Laravel

When working with databases in Laravel, specifically using Eloquent ORM, managing relationships between models can become complex. A common scenario occurs when you want to delete a primary record and also ensure that all related records in other tables are deleted.

In this guide, we will look at how to delete an Order and all its related OrderItem and GoldSilver records seamlessly.

Understanding the Problem

You have three tables: Order, OrderItem, and GoldSilver. The relationships are set up such that:

An Order can have multiple OrderItems.

Each OrderItem is linked to a GoldSilver item.

Upon deleting an Order, you also want to delete all relevant OrderItems and their associated GoldSilver items. While Laravel Eloquent provides an easy way to delete associated OrderItems, deleting the corresponding GoldSilver records requires additional steps.

Your Initial Setup

Your current model relationships are as follows:

Order.php

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

OrderItem.php

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

GoldSilver.php

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

The Solution

To achieve your goal, we need to modify the destroy method in your controller. The aim is to:

Retrieve the Order record.

Loop through each OrderItem to delete their corresponding GoldSilver records.

Delete the OrderItems themselves.

Finally, return a success response.

Step-by-Step Implementation

Here's how you can adjust your destroy method:

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

Explanation of Code Changes

Finding the Order: Using Order::find($id) retrieves the order you wish to delete.

Looping through OrderItems: By iterating through the orderItem collection, you can access each OrderItem related to the Order.

Deleting GoldSilver items: For each OrderItem, you call goldSilver()->delete() to remove the corresponding record before deleting the OrderItems.

Deleting OrderItems: Finally, order->orderItem()->delete() clears out all items related to that order.

Conclusion

Deleting records in a relational database can often lead to unintentional data remaining or orphan records. By carefully managing related Eloquent relationships in Laravel, you ensure that when you delete an Order, all its associated OrderItems and GoldSilver entries are efficiently removed. This approach not only keeps your database clean but also prevents potential bugs from orphaned data.

If you have more questions about managing relationships in Laravel, feel free to reach out!