From: "matz (Yukihiro Matsumoto) via ruby-core" <ruby-core@...>
Date: 2025-07-10T08:56:41+00:00
Subject: [ruby-core:122714] [Ruby Feature#21435] Kernel#then_try as a conditional #then

Issue #21435 has been updated by matz (Yukihiro Matsumoto).

Status changed from Open to Rejected

From my point of view, it doesn't make the code clearer. Besides that, the core Ruby does not provide even `#try`.
Maybe ActiveSupport wants to add this method, but not in the core.

Matz.


----------------------------------------
Feature #21435: Kernel#then_try as a conditional #then
https://bugs.ruby-lang.org/issues/21435#change-113991

* Author: Alexander.Senko (Alexander Senko)
* Status: Rejected
----------------------------------------
## What

When chaining, I need sometimes to apply some changes conditionally, like this:
```ruby
@record = Record.find(record_id)
  .then { it.respond_to?(:decorate) ? it.decorate : it }
```

It would be great to DRY it a bit:
```ruby
@record = Record.find(record_id)
  .then_try { it.decorate if it.respond_to? :decorate }
```

Or, even shorter for Rails users:
```ruby
@record = Record.find(record_id)
  .then_try { it.try :decorate }
```

## Why

The intent is to **make it visible at a glance that a statement _may_ affect the result**, but not necessarily does so. Without the proposed method, one needs to read and parse the whole block to know that.

It should help to read longer processing chains, for those who prefer chains and `#then` to plain old iterative approach.

## Naming

It is discussible. I have just two ideas yet:
- `then_try`
- `optional`
- `maybe`

## Reference implementation

```ruby
# Yields self to the block and returns the result of the block if it���s
# truthy, and self otherwise.
def then_try
  tap do
    result = yield(self) or next

    break result
  end
end
```



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