[Validation][FrameworkBundle] Add auto_mapping config

[ogizanagi]

I may have missed it, but I didn't find any documentation about the validation.auto_mapping config in FrameworkBundle (nor in the fwb ref page).

Ex:

framework:
    validation: 
        # Enables validator auto-mapping support.
        # For instance, basic validation constraints will be inferred from Doctrine's metadata.
        auto_mapping:
            App\Entity\: []

(ref symfony/recipes#664)

[carsonbot]

Thank you for this issue.
There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Hello? This issue is about to be closed if nobody replies.

[ogizanagi]

This feature still isn't documented

[ro0NL]

@ogizanagi can you tell me if an an empty array is intended to disable auto-validation, or could it mean validate everything actually? We got this issue symfony/symfony#44693 :D

[ogizanagi]

An empty array where? IIRC:

framework:
    validation:
        auto_mapping:
            App\Entity\: []

should auto-validate everything in the App\Entity\ ns.

framework:
    validation:
        auto_mapping: []

should not enable auto-validation in any ns.

[ro0NL]

Sorry, it's about your second example. This is the default config, and it causes validation to run on our 4.4 app 🙈

symfony/symfony#44698 im a bit less hesitant now to apply patch on 4.4 :)

[carsonbot]

Thank you for this issue.
There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Could I get an answer? If I do not hear anything I will assume this issue is resolved or abandoned. Please get back to me <3

[carsonbot]

Hey,

I didn't hear anything so I'm going to close it. Feel free to comment if this is still relevant, I can always reopen!

[zacharywp]

This feature still isn't documented

Correct. This still isn't documented in the fwb ref page nor can I find any inline documentation in symfony/framework-bundle.

This feature is presently disabled by default, or opt-in, as you know.

It is mentioned in Databases and the Doctrine ORM: Validating Objects, but the feature being opt-in isn't.

I think it would be nicer to move this new section to a complete new article, linked at the bottom of the guide. It's not really a base feature we should explain in Doctrine imo. Ideally, we should make the main guides as short as possible.

Originally posted by @wouterj in #11132 (comment)

I would agree in the context of the lack of a reference to this feature in FrameworkBundle documentation being an issue and the feature presently being opt-in. Otherwise, the feature itself would be explained in the Doctrine documentation alongside a note of it being opt-in, how to opt-in, and then referenced in the FrameworkBundle documentation.

Ref: #18245, #11132, symfony/symfony#34860