[LiveComponent] Handle loose comparison with empty placeholder #2426
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Thank you @FoxCie. |
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Thank you for the quick merge! |
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…ues()` with edge cases (smnandre) This PR was squashed before being merged into the 2.x branch. Discussion ---------- [LiveComponent] Fix `ComponentWithFormTrait::extractFormValues()` with edge cases | Q | A | ------------- | --- | Bug fix? | yes | New feature? | no <!-- please update src/**/CHANGELOG.md files --> | Issues | Fix #2487 | License | MIT #2403 fixed an old bug to simulate browser behaviour when a select field has no option selected, no placeholder, and is required (it then uses the first option) #2425 and #2426 fixed the way we handled empty strings as placeholders In #2487 `@maciazek` explained us how a custom type with a "choices" option became unusable since the last changes. Also.. while I was reading all this I realized we returned wrong values here when "option groups" were used.. leading to other problems. I updated the code of `extractFormValues()` method to: * check if most of the caracteristic keys added in `ChoiceType::buildView` were defined in the `$view->vars`, to ensure we are dealing with a `<select>` field built by a `ChoiceType` * fetch recursively the value of the first displayed option (even with groups) Commits ------- b7f1ba4 [LiveComponent] Fix `ComponentWithFormTrait::extractFormValues()` with edge cases
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Fix for a bug that arises when using an empty placeholder in a required select field, that is wrongly treated as an absence of placeholder by LiveComponents.
LiveComponents test placeholders of required selects to detect when to set a default value from the choices (i.e. if the select is required and does not have a placeholder, among other conditions) by just casting the placeholder to a boolean. This leads to empty placeholders (placeholders that are the empty string) to be treated as an absence of placeholders when they should not. This MR fixes this by replacing the condition on placeholders with a more appropriate one.
According to the docs https://symfony.com/doc/current/reference/forms/types/choice.html#placeholder and https://symfony.com/doc/current/reference/forms/types/choice.html#field-variables, the placeholder can be a boolean (
falseindicates that there should not be a placeholder), a string (the text to display for the empty value) or a TranslatableMessage (same as string, but goes through a translator before being displayed). The vars property is either the value of the field, ornullif there is no placeholder specified. From this, I considered that there is no placeholder either if the placeholder holdsfalseornull.I added a simple test that checks the behaviour when there is a required select with an empty placeholder ; we expect the value of the field to be empty in such cases when we do not modify it.
#SymfonyHackday :)