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| Q | A |
|---|---|
| Bug report? | yes |
| Feature request? | no |
| BC Break report? | no |
| RFC? | no |
| Symfony version | 4.0.0-RC1 |
Reproducer: https://github.com/derrabus/symfony-reproducers/tree/bug/no-exception-on-missing-form-component
It is possible to enable the form component without having it actually installed. Container compilation will work without errors and the application remains usable. However, if the console is called without a command, it will bail because of a missing class.
$ ./bin/console
Symfony 4.0.0-RC1 (kernel: src, env: dev, debug: true)
Usage:
command [options] [arguments]
Options:
-h, --help Display this help message
-q, --quiet Do not output any message
-V, --version Display this application version
--ansi Force ANSI output
--no-ansi Disable ANSI output
-n, --no-interaction Do not ask any interactive question
-e, --env=ENV The environment name [default: "dev"]
--no-debug Switches off debug mode
-v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
2017-11-21T22:58:12+00:00 [error] An error occurred while using the console. Message: "Class 'Symfony\Component\Form\Command\DebugCommand' not found"
2017-11-21T22:58:12+00:00 [critical] Class 'Symfony\Component\Form\Command\DebugCommand' not found
In getConsole_Command_FormDebugService.php line 8:
Attempted to load class "DebugCommand" from namespace "Symfony\Component\Form\Command".
Did you forget a "use" statement for "Symfony\Bridge\Twig\Command\DebugCommand"?
list [--raw] [--format FORMAT] [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi] [--no-ansi] [-n|--no-interaction] [-e|--env ENV] [--no-debug] [--] [<command>] [<namespace>]
Also, installing Twig will break the container compilation:
$ composer require twig
Using version ^4.0@RC for symfony/twig-bundle
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 3 installs, 0 updates, 0 removals
- Installing twig/twig (v2.4.4): Loading from cache
- Installing symfony/twig-bridge (v4.0.0-RC1): Loading from cache
- Installing symfony/twig-bundle (v4.0.0-RC1): Loading from cache
Writing lock file
Generating autoload files
Symfony operations: 1 recipe (2b3a73184b0320a68c669f39ebe1b621)
- Configuring symfony/twig-bundle (3.3): From github.com/symfony/recipes:master
Executing script cache:clear [KO]
[KO]
Script cache:clear returned with error code 1
!!
!! In ContainerBuilder.php line 942:
!!
!! You have requested a non-existent service "twig.extension.form".
!!
!!
!!
Installation failed, reverting ./composer.json to its original content.
Both error messages are imho not helpful. I would expect a nice exception if the Form component is enabled without having it installed, e.g. "Form cannot be enabled. Please install symfony/form first."
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DX = Developer eXperience (anything that improves the experience of using Symfony)DX = Developer eXperience (anything that improves the experience of using Symfony)