![]() For example, the package provides a simple and elegant way to log model changes. There are a number of third-party packages that can help you log changes to database tables in Laravel. If you do decide to use database triggers, be sure to write them carefully and test them thoroughly. Use Laravel model events for logging changes to database tables in Laravel applications, unless performance is a critical concern. Here is a summary of the key differences between database triggers and Laravel model events for logging: Database Triggers vs Laravel Model Events Features However, if performance is a critical concern, you may want to consider using database triggers instead. ![]() ![]() There are a few different ways you can do this, and in this tutorial, I will walk through them and explain the benefits and drawbacks of each one. They are simpler to write and maintain, and they are easier to test. Published on August 25th, 2022 by Steve McDougall When working with Eloquent Models, it is common to tap into the events dispatched through the Models lifecycle. In general, I recommend using Laravel model events for logging changes to database tables in Laravel applications. Portability: Laravel model events are less portable than database triggers because they are specific to Laravel. Performance: Laravel model events are generally slower than database triggers because they are executed by your Laravel application. Testable: Laravel model events are easier to test than database triggers because they can be tested inside of your Laravel application. Simple: Laravel model events are simpler to write and maintain than database triggers. Portability: Database triggers are more portable than Laravel model events because they are not specific to Laravel.Ĭomplexity: Database triggers can be complex to write and maintain.ĭebugging: Database triggers can be difficult to debug because they are executed outside of your Laravel application. /rebates/2fcourse2flaravel-interview-questions2f&. Performance: Database triggers are generally faster than Laravel model events because they are executed directly by the database engine. Laravel model events: Laravel model events are a Laravel-specific feature that allows you to listen for and respond to changes to Eloquent models.īoth approaches have their own advantages and disadvantages. You have total control whether to run your listeners synchronously or asynchronously.Įven if you don’t follow this, hopefully this article was helpful to you in some way.There are two main ways to log changes to database tables in Laravel applications:ĭatabase triggers: Database triggers are special procedures that are automatically executed when certain events occur on a table, such as INSERT, UPDATE, or DELETE. Good code is code that is easy to move around (or delete). Your test suite will also run faster since you aren’t running unrelated code in your tests. This approach may seem simple, but it can grow with your application while also maintaining good test coverage by having tests that don’t break easily. Now, if from the developer perspective you should always assign an UUID to the model when it gets created, then yes, model observers are the way to go. But from a developer perspective, you don’t want the user going there when you’re testing your code, for instance. ![]() If you ask your client whether every time a user is created, it should go to the marketing system, he is going to answer yes, 100%. Is this action something that always needs to happen from the developer OR from the client perspective? Events allow you to easily execute code each time a specific model class is saved or updated in the database. event listeners isn’t trivial, I tend to ask this question: Eloquent models fire several events, allowing you to hook into the following points in a models lifecycle: retrieved, creating, created, updating, updated, saving, saved, deleting, deleted, restoring, restored. Since deciding when to use model observers vs. However, I still think there’s space for model observers. For instance, in our code where we use our user factory, we would have to do something in order to avoid sending notifications, mocking our HTTP integration with our marketing system, and so on. ![]() Using model observers can be really handy, but since they are global, they will run everywhere. You may have noticed that instead of dispatching the UserCreated event in our controller, we could have simply dispatched the event directly in a model observer. It’s a simple test, but it can save you from situations like when a giant git rebase results in accidentally removing one listener while fixing the conflicts on the EventServiceProvider. Event::assertListening is a recent contribution I made to the Laravel framework, and it covers this missing gap between asserting the events are dispatched and unit testing your event listeners code. ![]()
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