Symfony Controller Download File __HOT__
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A controller is a PHP function you create that reads information from theRequest object and creates and returns a Response object. The response couldbe an HTML page, JSON, XML, a file download, a redirect, a 404 error or anythingelse. The controller runs whatever arbitrary logic your application needsto render the content of a page.
What if you need to read query parameters, grab a request header or get accessto an uploaded file? That information is stored in Symfony's Requestobject. To access it in your controller, add it as an argument andtype-hint it with the Request class:
Let's say a user sends you a request with the following query string: =John&lastName=Smith&age=27.Thanks to the MapQueryParameterattribute, arguments of your controller's action can be automatically fulfilled:
This way, browsers can start downloading the assets immediately; like thestyle.css and script.js files in the above example). ThesendEarlyHints() method also returns the Response object, which youmust use to create the full response sent from the controller action.
In Symfony, a controller is usually a class method which is used to acceptrequests, and return a Response object. When mapped with a URL, a controllerbecomes accessible and its response can be viewed.
To facilitate the development of controllers, Symfony provides anAbstractController. It can be used to extend the controller class allowingaccess to some frequently used utilities such as render() andredirectToRoute(). The AbstractController also provides thecreateNotFoundException() utility which is used to return a page not foundresponse.
I would rather think that the first approach is appropriate to keep controller thin (thin controllers, big models) but is this approach right? What code should be in entity, what in controller and what in a service?
Let's also pretend that in many place in my app I need to check if document is finalized before allowing user to perform any action (e.g. edit it). This definitely should be either in a service, as another service would be required to check this. Should I however load the document entity object in controller, send it to service to verify whether it may be finalized or rather load document in service and there perform a check?
Each action inside a controller calls one or more methods from the entity's manager; I always try to avoid using directly the respository's "magic methods" in favor of custom made methods: inside the action, instead of calling
use a service to pass to controller list of documents based on some criteria after performing the required logic, or use a controller to download list of documents, and than pass document to service to perform some logic?
Rather, second. Just because it lets you to understand what's going on looking at your controller code. The way all web-frameworks work is supposed to map each request to controller action. Following this logic expecting a request you go to the controller. I'd suggest you to call service directly in controller to do some custom logic on data. But if you need to retrieve data from database it's better to implement in your repository class not in service.
I would rather think that the first approach is appropriate to keep controller thin (thin controllers, big models) but is this approach right? What code should be in entity, what in controller and what in a service?
It's also pretty easy. You should relate to em there where you need to. There is nothing bad if your logic is not complex and the only need you have before show result to a user is to do very tiny stuff (like setting some virtual property to retrieved entity) its absolutely ok to put this logic into controller.But don't forget refactor your code with complexity growing. If it becomes a code which should be applied in different places (repeatable code) - get in out from controller into service.
These callables are called "controllers". In Symfony, most controllers are implemented as PHP classes. You can create such a class manually, but because we like to go fast, let's see how Symfony can help us.
For configuration related to PHP code, attributes are a better choice as they are defined next to the code. Let me explain with an example. When a request comes in, some configuration needs to tell Symfony that the request path should be handled by a specific controller (a PHP class). When using YAML, XML or PHP configuration formats, two files are involved (the configuration file and the PHP controller file). When using attributes, the configuration is done directly in the controller class.
You might wonder how you can guess the package name you need to install for a feature? Most of the time, you don't need to know. In many cases, Symfony contains the package to install in its error messages. Running symfony console make:message without the messenger package for instance would have ended with an exception containing a hint about installing the right package.
Symfony exposes the request data through a Request object. When Symfony sees a controller argument with this type-hint, it automatically knows to pass it to you. We can use it to get the name item from the query string and add an title.
The name part of the route is a dynamic route parameter - it works like a wildcard. You can now hit /hello then /hello/Fabien in a browser to get the same results as before. You can get the value of the name parameter by adding a controller argument with the same name. So, $name.
I have tested and I it kind of works. But the issue is that the importer class requires the employee access and it does not work. It seems like that the implementation of import is coupled with admin access for employee. So it is not possible to reuse the symfony services of admin in front end controllers.
Every web framework... in any language... has the same main job: to give you a route & controller system: a 2-step system to build pages. A route defines the URL of the page and the controller is where we write PHP code to build that page, like the HTML or JSON.
Ok, route done: it defines the URL and points to the controller that will build the page. Now... we need to create that controller! Inside the src/ directory, there's already a Controller/ directory... but it's empty. I'll right click on this and select "New PHP class". Call it QuestionController.
And.. congratulations! You are inside of a controller function, which is also sometimes called an "action"... to confuse things. Our job here is simple: to build the page. We can write any code we need to do that - like to make database queries, cache things, perform API calls, mine cryptocurrencies... whatever. The only rule is that a controller function must return a Symfony Response object.
Find your browser. We're already on the homepage... so just refresh. Say hello to our very first page. I know, it's not much to look at yet, but we've already covered the most foundational part of Symfony: the route and controller system.
I'm not sure I understand your question... Usually you don't need to specify methods there, the first few lines should register all your classes in the resource: ../src/Controller/ dir, i.e. this way you should not write a specific controller there, only the dir to all your controllers, i.e.:
if you want to specify exact controller - you should use the code from the tutorial: -controller#codeblock-b54cc0bccb where you need to specify the exact method. But then you should remove those few lines that are responsible for registering all your controllers or change it to avoid conflicts.
Hi together,
I'm trying do do this cource with my actual configuration. I've installed Symfony CLI version 5.4.1, symfony welcome page at the end of chapter 2 says: Welcome to Symfony 6.0.5.
Because Harmonious Development with Symfony 6 is not available I use this course and now I face the following problem:
The routes.yaml file in my project is totally different from the file in the video:
routes.yaml (video):
# index
# path: /
# controller: App\controller\DefaultController::index
I'd recommend you to wait the next version of tutorial, but the best way for you is to download code from this tutorial and use it instead of one generated by symfony new command. Also as way may be installing symfony 5 instead of 6 you can do it with
symfony new --version=5.0
Hey guys, I come from the old layered architecture and trying to get a taste of Symfony.
What is the best approach to rendering different blocks (menu, products, news etc.) on the same page?
I googled and apparently you can render multiple controllers inside one Twig view like so:
`{{ render(controller(
I have a controller method, that takes ID value and then fetch the user from the database for that ID value. I'm facing the problem that I can not use that controller method in the twig template as the forms action method. It gives me an error when the application loads the page. It says it expect an ID value on the forms action method.
At the moment I am using two controller methods, one method to load the edit page, with the ID value as a parameter and the second method to process the values when form is submitted (and also to use as the forms action method).
Sorry for my late reply. I got bugged down by the SymfonyWorld conference. You can add the return type to your controller's actions if you want
and about the unused element. You can ignore that warning because PHPStorm does not know that that method it's going to be calle dynamically
I like the quiz feature very much, but I think that the text of the full answer is misleading. There it is written: "The only rule of a Symfony controller is that it must return a Symfony Response object". Controller is a class and classes do not return objects to my understanding. I think you meant a controller function or an "action" if that's the name. In two places of this text it is the "controller" that returns an object.
Hmm, I think you're right! As you correctly said, that word controller can mean either the class or the method/function. In this case, we were a bit lazy with our words and could have been more clear. I'm going to update that now!
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