What should I do if there is an error when passing parameters in laravel route?

Routing is a very important and commonly used function when using the Laravel framework. It can easily link website access requests to the corresponding controllers and methods.

In some cases, we need to pass some parameters in the route so that the controller and method can obtain the corresponding data information. However, sometimes errors in parameter transmission may occur during actual use. Here we will discuss the solution to this problem.

In Laravel, there are two ways to pass route parameters, one is to use URL parameters, and the other is to use route parameters. Below we will introduce these two parameter passing methods respectively.

1. URL parameter passing

URL parameter passing is to pass data information by adding parameters after the URL. For example, if we need to pass a user ID to the controller method, we can use the following method:

Route::get('/user/{id}', 'UserController@show');

In this route, we use {id} as the parameter placeholder, Indicates that an ID parameter needs to be passed. Then in the show method in the controller, we can get the parameter like this:

public function show($id)
{
    // 获取到用户ID，然后进行相应的操作
}

In this way, the user needs to pass the corresponding parameter in the URL when accessing, such as /user/1 will pass 1 as a parameter to the show method.

However, sometimes you may encounter an error message similar to the following:

Missing required parameters for [Route: user.show] [URI: user/{id}]. (View: ...)

This error message means that when using the route() function to generate a URL, Failure to pass required parameters causes URL generation to fail. The solution is to pass the corresponding parameters when using the route() function to generate the URL:

<a href="{{ route(&#39;user.show&#39;, [&#39;id&#39; => $user->id]) }}">用户详情</a>

And if we need to pass multiple parameters, we can add multiple key-value pairs in the array ：

<a href="{{ route(&#39;user.edit&#39;, [&#39;id&#39; => $user->id, 'name' => $user->name]) }}">编辑用户信息</a>

2. Routing parameter passing

Routing parameter passing is to pass data information by setting parameters when defining the route. For example, if we need to pass a product ID and product name to the controller method for query, we can use the following method:

Route::get('/product/{id}/{name}', 'ProductController@show');

In this route, we use {id} and {name} is used as a parameter placeholder, indicating that an ID and name parameter need to be passed. Then in the show method in the controller, we can get these two parameters like this:

public function show($id, $name)
{
    // 获取到商品ID和商品名称，然后进行相应的查询操作
}

In this way, the user needs to pass the corresponding parameters in the URL when accessing, for example /product/1/Apple will pass 1 and Apple as parameters to the show method.

However, sometimes you may encounter errors when passing parameters. For example, when using the following method to generate a URL:

<a href="{{ action(&#39;ProductController@show&#39;, [$product->id]) }}">商品详情</a>

, the following error message will appear:

Missing required parameters for [Route: ] [URI: product/{id}/{name}]. (View: ...)

The solution is to pass the corresponding response when using the action() function to generate the URL. Parameters:

<a href="{{ action(&#39;ProductController@show&#39;, [$product->id, $product->name]) }}">商品详情</a>

Summary

Through the above introduction, we can see that the way to use Laravel routing parameters is very simple, but you will encounter some minor problems during actual use. question. Therefore, we need to pay attention to checking whether the parameter passing method and passed parameters are correct when writing code to avoid errors and functional abnormalities.

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