Data binding: Bind repeatable list of textboxes into List<String>

[Oliver Gondža-2]

Hey, I am struggling with something supposedly simple. I need to get a
list of strings from user through both UI and JCasC.

In UI, I use `f:repeatable > f:textbox`, that unfortunately produces a
bit clumsy json structure of `"foo": [ {"name": "value 1"},
{"name": "value b"}, ... ]`. For databinding only, this is hidden and
can be read through a dummy data-bound class with field `String name` so
I can consume `List<Dummy>` and unwrap the strings manually. However,
this breaks the desired JCasC semantics of:

```
foo:
   - one
   - two
```

I ended up overriding `GlobalConfiguration#configure` to massage the
Json during form submission only to make it match the straightforward
type of `List<String>` that also works for JCasC. That, of course, is ugly.

Is there a more elegant way to read list of string inputs and have it
bound to `List<String>`?

Thanks!
--
oliver

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[Daniel Beck-2]

https://issues.jenkins.io/browse/JENKINS-27901

On Wed, Jan 6, 2021 at 11:53 AM Oliver Gondža <[hidden email]> wrote:

Hey, I am struggling with something supposedly simple. I need to get a
list of strings from user through both UI and JCasC.

In UI, I use `f:repeatable > f:textbox`, that unfortunately produces a
bit clumsy json structure of `"foo": [ {"name": "value 1"},
{"name": "value b"}, ... ]`. For databinding only, this is hidden and
can be read through a dummy data-bound class with field `String name` so
I can consume `List<Dummy>` and unwrap the strings manually. However,
this breaks the desired JCasC semantics of:

```
foo:
   - one
   - two
```

I ended up overriding `GlobalConfiguration#configure` to massage the
Json during form submission only to make it match the straightforward
type of `List<String>` that also works for JCasC. That, of course, is ugly.

Is there a more elegant way to read list of string inputs and have it
bound to `List<String>`?

Thanks!
--
oliver

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[Jesse Glick-4]

Note that `CustomDescribableModel` was intended to help with this sort of case (`String` → `List<String>` and vice-versa) but AFAIK is not yet honored by `configuration-as-code`, which does not use `structs` APIs for its introspection.

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[Oliver Gondža-2]

Thanks for confirmation, folks. The issue have pointed me to using textarea to represent the list of strings making my life a whole lot simpler!

On Wednesday, January 6, 2021 at 7:57:36 PM UTC+1 Jesse Glick wrote:

Note that `CustomDescribableModel` was intended to help with this sort of case (`String` → `List<String>` and vice-versa) but AFAIK is not yet honored by `configuration-as-code`, which does not use `structs` APIs for its introspection.

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