How to delete data in thinkphp model

ThinkPHP is a popular PHP development framework that allows us to develop Web applications more efficiently by using the MVC architecture. When developing web applications, we need to use databases to store and manage data. Therefore, it is very important to understand how to use ThinkPHP models to delete data.

In ThinkPHP, we can use models to operate database tables, including adding, modifying and deleting data. Now, let's learn how to delete data from the model.

Deleting a single piece of data

Deleting a single piece of data is relatively simple, you only need to use the delete method in the model. For example, we have a User model and want to delete the user data with id 1:

$user = new User();
$user->where('id', 1)->delete();

In this way, the user's data is deleted.

Delete multiple pieces of data

In some cases, we need to delete multiple pieces of data in batches. In ThinkPHP, it is also very easy to implement. We only need to use the where conditional statement in the model to select the data that needs to be deleted.

For example, we have an Article model and need to delete all articles classified as 3:

$article = new Article();
$article->where('category_id', 3)->delete();

In this way, all articles classified as 3 are deleted.

Soft deletion

In practical applications, sometimes we do not want to delete data directly from the database because it may cause irreversible data loss. Instead, soft deletion is achieved by setting the deletion flag to 1 so that it can be restored or recovered in some way in the future. In ThinkPHP, we can solve this problem by using soft delete.

First, we need to add a "deletion flag" field to the data table, for example: deleted_at. Then, define a protected $deleteTime = 'deleted_at' attribute in the model to achieve soft deletion.

For example, we have a Goods model that needs to be soft deleted:

//定义Goods模型中的删除标志
protected $deleteTime = 'deleted_at';

//执行软删除操作
$goods = Goods::get(1);
$goods->delete();

In this example, if we perform a soft delete operation, the deleted_at field of the product will be set to the current time , while the data actually still exists in the database.

Summary

In this article, we learned how to delete data using the ThinkPHP model. We can use the delete method to delete a single piece of data, or use the where conditional statement to delete multiple pieces of data. Additionally, we covered how to use soft delete to preserve data and recover it if needed. Mastering these methods can help us manage and maintain data in the database more efficiently.

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