Скачать или смотреть Resolving the 404 Error: How to Correctly Post to a Route in Laravel

Learn how to fix the `404` error in Laravel when expected response status codes are not returned. This guide provides clear solutions and code examples to successfully add products to the cart.
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This video is based on the question https://stackoverflow.com/q/74818425/ asked by the user 'Tilda Mendozae' ( https://stackoverflow.com/u/17917985/ ) and on the answer https://stackoverflow.com/a/74818770/ provided by the user 'Tim Lewis' ( https://stackoverflow.com/u/3965631/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the 404 Error: How to Correctly Post to a Route in Laravel

If you're working with Laravel and encounter the frustrating error message "Expected response status code [201, 301, 302, 303, 307, 308] but received 404," it’s likely due to the way you are posting to a defined route. This issue is common among developers, especially when they are trying to integrate various components of their application, such as routes, controllers, and tests. In this guide, we’ll break down the problem and provide you with a clear solution.

Understanding the Problem

When you receive a 404 error, it means that the route you are trying to access cannot be found. This is particularly problematic if you believe you are correctly referencing the route in your code. Let’s take a closer look at the code structure you’re dealing with.

Test Method: The method responsible for testing the addition of a product to the cart.

Route Declaration: Your defined route for handling the addition of products.

Controller Method: The method that processes the request and redirects to another route.

Your Code Structure

Test

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Route

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Controller

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Solution: How to Fix the 404 Error

To resolve the issue, you need to ensure that you're sending your POST request to the correct URL. Your current test is not using the full path that matches your defined route. Here’s how you can fix it:

Step 1: Reference the Correct URL

The route defined requires a product ID to be passed in the URL. Here are three different ways to correctly post to the intended route:

Using direct URL interpolation:

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Using the URL helper:

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Using the named route helper:

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Step 2: Define the Product

You need to ensure that a product is created or referenced in your test. This can be done using the following approaches:

Creating a new product:

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Referencing the first product:

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Step 3: Complete the Test Method

Here’s what your complete test method should look like:

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Conclusion

By ensuring that you correctly define the URL you’re posting to and having a product instance available in your test, you can successfully avoid the 404 error and see the expected response status codes. Remember, Laravel's routing system is powerful, but it requires accuracy in how you call your routes.

If you continue to experience issues, double-check your route definitions and ensure that you are authenticated when testing routes that require middleware authentication. Happy coding!