Returning error messages just once for every field

[iedmrc]

Support plan

• which support plan is this issue covered by?
  Community
• is this issue currently blocking your project?
  Partially
• is this issue affecting a production system?
  No

Context

• node version:
  v10.8.0
• module version:
  17.1.0
• environment (e.g. node, browser, native):
  node.js
• used with (e.g. hapi application, another framework, standalone, ...):
  another framework (strapi)
• any other relevant information:

How can we help?

Hi,
As in the title, I want to return just one error message for every field.
I tried error() and it just returns the very first error even {abortEarly: false} is set.
I tried message(), messages(), rule() with ruleset and either they did nothing or I got "Error: Cannot set flag inside a ruleset". I just want to do a very simple thing but couldn't for 3-4 hours. I read documents and issues and tried all I understand, as listed above. Some were legacy (belongs to older versions) some were not worked.
How can I achieve this?
Thanks!

[hueniverse]

You either get one error for the entire validation process or you get every single error found. If you are using error() it will override all other errors because it is designed to return custom errors and not joi validation errors. You will need to write your own error processor that consolidates the errors per field. Not sure how that will work if you have sub field, but this is not a common use case.