Okay so I have an project folder inside my Laravel app. named TLGD (the name if my site). Inside i created a form validation helper which is being used to take away unnecessary code form the controller.
here is the folder structure:
TGLD\Validation\Forms
and inside here I have my form helper classes
now in the controller just to test it out I was calling the classes by the use methd from php like so:
use TGLD\Validation\Forms\Login;
login being the class for the login validation
now thus works great so I tried to autoload the TGLD folder so I don't need to add the use line in every controller. Here is my composer.json file
"autoload": {
"classmap": [
"app/commands",
"app/controllers",
"app/models",
"app/database/migrations",
"app/database/seeds",
"app/tests/TestCase.php"
],
"psr-4": {
"TGLD\\": "app/TGLD"
}
},
but when I autoload it it gives me the error that my login class doesn't exist which means the autoloader is not working. Is there a syntax error or am I missing something? I ran
composer dump-autoload -o
well any advice is helpful thank you in advance
What you want to do cannot be done.
You have to use the complete namespace somewhere to identify the class you want to use. You have several options to do this
Using the fully qualified name of the class with namespace like this: new \TGLD\Validation\Forms\Login().
Using a use clause that imports the named class into the current namespace for this file with use TGLD\Validation\Forms\Login; ... new Login();
Using a part of the namespace in the use, and use the rest in the class name: use TGLD\Validation\Forms; ... new Forms\Login();
After you have chosen the class name in one way or the other, PHP knows which class it needs, and then triggers the autoloading if the class is still unknown to PHP.
So you cannot affect the naming of classes with autoloading.
Related
I am just start working with Laravel, want to create a custom class and want to call this class in every controller. For this, I create a Customer class in app/Library/ folder.
When I tried to autoload this library via composer, json it's giving an error:
Could not scan for classes inside "App/Library/Customer" which does not appear to be a file nor a folder.
How can we use autoload class in controllers?
Customer.php
<?php
namespace App\Library;
use App\Model\User;
class Customer
{
public function login($user_name,$password){
$data = User::where('email', $user_name)
->where('password', $password)
->first();
return $data->id';
}
}
Autoload section of Composer.json
{
"autoload": {
"classmap": [
"database",
"app/Library/Customer"
],
"psr-4": {
"App\\": "app/"
},
"files" : [
"app/Helper/helper.php"
]
}
}
I think you're not understanding what the composer autoload is there for. You use this to include libraries and their dependencies, not really for classes you've created in your app.
What you're better off doing is when you create the controller add in the class you want to use eg:
<?php
use App\Library\Customer;
You will need to put this in every controller.
You should remove it from the classmap group and just add the proper namespace and class. You can see all the psr-4 standards here: http://www.php-fig.org/psr/psr-4/
Lets say you have a folder structure like this:
app
-> Library
-> Customer.php // namespace App\Library; class Customer{}
-> Model
-> User.php // namespace App\Model; class User{}
And all the files should autoload as long as you use the proper namespace and class names.
By the way you should use the Auth facade instead: https://laravel.com/docs/5.4/authentication
There is no need to classmap as already psr-4 autoloading is in place. You've to understand how it works. then you can simply import your classes using use keyword, like this
<?php
use App\Library\Customer;
For more information read PSR-4: Autoloader and take this Tutorial
I am trying to change an autoloading system that I've written before.
I'm using composer and at the moment I'm autoloading just one library with class map.
"autoload": {
"classmap": ["libs/"]
}
I want to add a psr-4 loader for the rest of the files and to be able to call the files under libs without namespaces and without "use" them' kind of like aliases in laravel. This is what I'm trying to do:
"autoload": {
"classmap": ["libs/"],
"psr-4": {
"App\\": ""
}
}
So eventually if in "libs" I have the Session class I'm calling it as:
Session::get('anything')
but now after trying to add the psr-4 and calling it from within a namespaced class
namespace App\models;
Class User{
function get(){
return Session::get('anything');
}
}
It won't work anymore because it looks for session within the user's namespace.
I know there are many frameworks which implements it out of the box with aliases.., it's just that this project is kinda old and I'm trying to organize it a bit and get rid of all the requires anywhere - at the moment each model has to be required.
I want to add a psr-4 loader for the rest of the files and to be able to call the files under libs without namespaces and without "use" them' kind of like aliases in laravel.
You can't use the classes without either adding use or adding the fully qualified namespace path starting with the backslash \. This has nothing to do with the way you load these classes, but is a basic requirement of PHP itself - so there is no way around it no matter how you'd like to design your autoloading.
As was commented, adding a backslash works, but this is the required minimum:
namespace App\models;
Class User{
function get(){
return \Session::get('anything');
}
}
I've ended up writing another class that aliasing any classses that i want so i will be able to call them out of the box.
you can see it here:
https://github.com/shahafan/SAmvc-App/blob/master/Config/Aliases.php
basically i'm just using the php class_alias function so i can load all the classes that i want before using them.
i think laravel does it the same way.
My Autoload specification are as follows
"autoload" : {
"psr-4" : {
"MyMVC\\" : "app/"
},
"classmap": [
"app/Controllers",
"app/Helpers"
],
"files": ["app/routes.php"]
},
The contents of routes.php file are:
<?php
use MyMVC\Core\Route;
$route = new Route;
$route->add('/', 'HomeController#index');
$route->add('about', 'AboutController#index');
$route->add('contact', 'ContactController#index');
now in my app/init.php i am trying to use the $route object but its giving me error
Notice: Undefined variable: route in /var/www/html/mymvc/app/init.php on line 29
Here is how i am trying to use the $route object.
/**
* Constructor
* Bootstrap our application based on the configurations provided
*/
public function __construct()
{
// require 'app/routes.php` This will work fine but it should be autoloaded
var_dump($route);
exit;
}
I have also ran command composer dump-autoload
Autoloading won't work here. PHP can only autoload classes. Your expectation that app/routes.php will be autoloaded is not possible, because that file does not contain a class declaration, and you are not able to trigger it's execution by using a previously unknown class.
It is true that Composer will execute that file once when you include vendor/autoload.php - however, this is really bad behavior of your software. Don't use the "files" autoloading to include configuration files. Mind the performance impact this may have when being used in libraries. You should avoid using it altogether, it is meant to be used for legacy code that cannot otherwise be made working.
On the other hand, your architecture is broken. You shouldn't write a class that "magically" knows about the configuration just by accessing a variable that is supposed to be initialized somewhere else. A good pattern would be to pass the configuration as a parameter to the constructor:
public function __construct ($routes)
{
$this->routes = $routes;
}
The part of the code that creates this class is supposed to grab the configuration from somewhere and pass it as a parameter. This concept is called inversion of control or dependency injection: Classes do not invoke the other classes they need to work with, they ask for them and get them as a parameter.
I would like to call statics methods in a helpers folders.
I have tried many tutos but it's always for just one file.
My config
/app/Helpers/Languages.php -> my static class
composer.json
"autoload": {
"classmap": [
"database",
"app/Helpers/" <- I understand, L5 add in own autoload
app.php
'aliases' => [ ...., 'Languages' => 'App\Helpers\Languages',
What I tried :
Add autoload classmap, HelpersServiceProviders class, namespace (work just in blade template, not in a Controller)
Add autoload psr-4 with and without classmap, namespace
For all the method, I need to put the use 'app/Helpers/Languages' but I would like call just Languages::myFunction() without 'use' . Is it possible ?
I already the 'app/' folder in psr-4 so it will be load folder and my file, isn't it ?
If it's can help when in load a page without I've :
FatalErrorException Class 'App\Http\Controllers\Languages' not found
When I updated composer.json, I did't forgot composer dump-autoload
I don't think the problem you have is because the class is not being autoloaded, but rather because you try to use it the wrong way. Even with the alias you added, when using the class from within a namespace (like App\Http\Controllers) you have to either add an import statement:
use App\Helpers\Languages;
// or with the alias
use Languages;
Or specify the FQN when using it:
\App\Helpers\Languages::myFunction();
// or with the alias
\Languages::myFunction();
You can't really avoid this. What you could do, so you don't have to worry about namespaces: use helper functions without a class. Just like Laravel's helper functions. (route(), 'trans()', etc)
I want to add Accessors and Mutators to a model. In Laravel 4 it worked all fine, but with Laravel 5 I have some trouble.
I have a "lib" folder in my App directory which contains the "db_transformers.php" file. This file holds classes like "dbDate" with a set and get function to transform dates stored in the database to a user-friendly format.
The "db_transformers.php" file is namespaced:
<?php namespace App\lib;
I also rerfer to the folder in my model:
use App\lib;
But my methodes still throw errors:
public function getDateTimeAttribute($value)
{
return dbDate::get($value);
}
This will return a "Class 'App\dbDate' not found" error.
What could be my problem?
You're confusing autoloading (PHP including/requiring a class definition file) with namespaces (a system that allows hierarchical naming of PHP classes/functions to help prevent code conflicts).
It's an easy thing to do. Covering the changes to autoloading in Laravel 5 is beyond the scope of a Stack Overflow question, but if you're interested I've written a multiple article series on how autoloading works with composer/Laravel 4/Laravel 5.
To your specific question, you say you've defined a class named dbDate in a file named db_transformers.php, and db_transformers.php has a namespace of App\lib.
#File: lib/db_transformers.php
namespace App\lib;
//other code
class dbDate
{
//other code
}
//other code
This mean your class's full name is App\lib\dbDate. The entire thing is the class's name. That's probably the biggest thing to get used to with namespaces in PHP.
This means if you wanted to use the class in other code, you'd need to refer to the full class name, including a leading backslash.
return \App\lib\DbDate::get($value);
You could also import the class using the use keyword
use App\lib\DbDate;
//other code
public function getDateTimeAttribute($value)
{
//since we imported the class with `use`, we don't need to type the full name
return DbDate::get($value);
}
The use keywords imports a specific class into the current namespace. When you said
use App\lib;
you were telling PHP
You know that global classApp\lib? I'm going to refer to it below as lib
Since you don't have a class named lib, this is meaningless, and it's why your use didn't help.
So that's namespaces. The other problem you need to solve is autoloading. Autoloading is what lets you skip the require or include statement/function when you want a class definition files in your project.
Laravel 4 used a bunch of different autoloaders, including something called a classmap autoloader. The classmap autoloader automatically parses all the files in your project looking for classes, and creates a giant map of which class is where (that's over simplifying it a bit, see the article series I linked earlier for the full details).
In Laravel 4, the classmap autoloader probably read the file in lib for you. Laravel 5 reduced the number of autoloaders, which included getting rid of the classmap autoloader for most folders.
The simplest thing you can do in Laravel 5 is to configure your project to use the classmap autoloader again. Open up composer.json and find this section
"autoload": {
"classmap": [
"database"
],
"psr-4": {
"App\\": "app/"
}
},
And add lib to the classmap autoloader section
"autoload": {
"classmap": [
"database",
"lib"
],
"psr-4": {
"App\\": "app/"
}
},
This tells composer to include the lib folders when it creates its autoloader files. You'll need to run the dumpautoload command
composer dump-autoload
after doing that, and you should be able to use the classes defined in lib/db_transformers.php as you wish.
You need to use the complete class name: use App\lib\dbDate;
You might also look into using view decorators for this purpose, as doing it in your model is really not appropriate.
Several packages exist to help with this, e.g. https://github.com/ShawnMcCool/laravel-auto-presenter