How to use newer not stable yet version of symfony? - composer-php

Question

Currently I use 5.2.3 version of Symfony. I want to use feature from this pull request https://github.com/symfony/symfony/pull/36851. It's rather github / composer related question rather than symfony itself. How to do it?
So far I try:
{
...
"symfony/form": "5.2.*-dev", // changes I made to composer.json
...
}
The composer update end successfully:
- Upgrading symfony/form (v5.2.4 => 5.2.x-dev 7664ad9): Extracting archive
But still If I use choice_translation_parameters in code I get:
public function buildForm(FormBuilderInterface $builder, array $options)
{
...
$builder->add('amount', ChoiceType::class, ["label" => "rese.amount?", "choices" => $roomAmountChoices, "choice_translation_parameters" => []]);
...
}
An error has occurred resolving the options of the form "Symfony\Component\Form\Extension\Core\Type\ChoiceType": The option "choice_translation_parameters" does not exist. Defined options are: "action", "allow_file_upload", "attr", "attr_translation_parameters", "auto_initialize", "block_name", "block_prefix", "by_reference", "choice_attr", "choice_filter", "choice_label", "choice_loader", "choice_name", "choice_translation_domain", "choice_value", "choices", "compound", "csrf_field_name", "csrf_message", "csrf_protection", "csrf_token_id", "csrf_token_manager", "data", "data_class", "disabled", "ea_crud_form", "empty_data", "error_bubbling", "expanded", "getter", "group_by", "help", "help_attr", "help_html", "help_translation_parameters", "inherit_data", "invalid_message", "invalid_message_parameters", "is_empty_callback", "label", "label_attr", "label_format", "label_html", "label_translation_parameters", "mapped", "method", "multiple", "placeholder", "post_max_size_message", "preferred_choices", "property_path", "required", "row_attr", "setter", "translation_domain", "trim", "upload_max_size_message".

Answer 1

Using *-dev isn't going to work because the code is still waiting to be merged into symfony/symfony.
Take a look at http://vvv.tobiassjosten.net/php/have-composer-use-development-branches/ for instructions how to override a package with a different repository.
In your case the composer.json would have:
"repositories": [
{
"type": "git",
"url": "https://github.com/VincentLanglet/symfony.git"
}
]
Warning: This will be good for short periods of time but going into production with this is risky. You will get the feature you want but are relying on the author to keep updated with the real symfony master.

Answer 2

Since it is an open (unmerged) branch, you can not directly pull it. You have to get this registered in your composer.json using repository pattern.
Something similar to
{
"repositories": [
{
"type": "git",
"url": "https://github.com/VincentLanglet/symfony.git"
}
],
"require": {
"symfony/form": "^5.2"
}
}

Answer 3

You (in this example me, because i answer to my own question ) do everything right, just pick wrong branch. Change it to:
{
...
"symfony/form": "5.*-dev",
...
}
If you take a closer look on symfony/form repository history you notice that previously composer pick branch which doesn't include commit with feature you request.