Laravel package 开发：没有为 [面包屑] 定义提示路径

Question

I have written a CMS package and am writing a bolt-on module to add events functionality.

Both of these packages use the Laravel Breadcrumbs library .

This is part of the service provider for the events module:

class EventsServiceProvider extends ServiceProvider
{
    // boot method

    // register method
    public function register()
    {
       $this->loadRoutesFrom(__DIR__ . '/routes/web.php');
    }
}

Breadcrumbs for the core CMS package all work fine until I try and load the additional breadcrumb routes for this events module package:

public function register()
{
    $this->loadRoutesFrom(__DIR__ . '/routes/web.php');
    $this->loadRoutesFrom(__DIR__ . '/routes/breadcrumbs.php');
}

This then stops all breadcrumb routes from working and the following error is encountered:

No hint path defined for [breadcrumbs]. (View: /Users/*****/Sites/****/CMS (Package)/src/views/admin/news/create.blade.php)

Answer 1

TL;DR

You're trying to load the breadcrumps routes file from the same directory of your package using __DIR__

Reference the file from the base path

$this->loadRoutesFrom(base_path('routes/breadcrumbs.php'));

The package itself reference it that way, see source

Explanation

__DIR__ is a predefined magic constant in PHP, see docs

__DIR__ The directory of the file. If used inside an include,
the directory of the included file is returned.
This is equivalent to dirname(__FILE__).
This directory name does not have a trailing slash unless it is the root directory.

It outputs the parent directory of the file executing it relatively

Example
Given a directory structure like this

~/test ✹ ★ ᐅ  tree 
.
├── folder
│   └── file.php
├── index.php
└── routes
    └── breadcrumps.php

file.php

<?php

echo __DIR__ . '/routes/breadcrump.php';

Outputs

/home/caddy/test/folder/routes/breadcrump.php

That's an incorrect path, routes directory is NOT inside folder

However an index.php (a renamed copy of file.php) outputs

/home/caddy/test/routes/breadcrump.php

Which is correct, because it's a relative path, index is in the parent directory of routes

Solution?

Use base_path() helper function since you're using Laravel

The base_path function returns the fully qualified path to the project root. You may also use the base_path function to generate a fully qualified path to a given file relative to the project root directory:

$path = base_path();

$path = base_path('vendor/bin');

It outputs a relative path to your index.php file in the public directory going back one step which is the root of your application

I hope this helps

Answer 2

I got this working by checking for the class and loading the routes in the boot method instead:

public function boot(Router $router)
{
  if (class_exists('Breadcrumbs')) {
       require __DIR__ . '/routes/breadcrumbs.php';
    }
}