Add hidden fields option to sanitizing

[lambertkevin]

Description of what you did:

Added a hiddenFields attribute to the response config in order to sanitize entities globally. It will help preventing default values from appearing on every responses of every entities. (e.g. __v or timestamps when using mongodb).

Fix #4342

My PR is a:

• 💥 Breaking change
• 🐛 Bug fix
• 💅 Enhancement
• 🚀 New feature

Main update on the:

• Admin
• Documentation
• Framework
• Plugin

Manual testing done on the following databases:

• Not applicable
• MongoDB
• MySQL
• Postgres
• SQLite

[derrickmehaffy]

LGTM this is a nice addition thank you 👍

[derrickmehaffy]

As a side note @lambertkevin because I know the Strapi team will say it, can you please add documentation for this?

https://github.com/strapi/strapi/blob/master/docs/3.0.0-beta.x/concepts/configurations.md

[alexandrebodin]

THanks for your contribution. I’ll take a look at i later.

[alexandrebodin]

The hiddenFields param shouldn't be set on the configuration files by default. A good documentation with an example would work just fine.

[lambertkevin]

@alexandrebodin Ok removed the default configs and added example to the documentation

[alexandrebodin]

Thanks for the update. I meant remove the hiddenFields key from the files completly.

[derrickmehaffy]

Remove this hiddenFields from the config

[alexandrebodin]

Hi @lambertkevin do you think you will be able to make the last changes ? Thanks !

[alexandrebodin]

Hi @lambertkevin I'm going to close this PR for now until you can make the changes ;).