Haskell on Rails

or: How I Learned to Stop Worrying and Love the Compiler

James Dabbs

@

I

Haskell

II

Yesod

III

Ruby

Haskell

Yesod

&

Haskell

Yesod

&

Haskell

Ruby

&

Old Chestnuts

Immutable data

=

😻

nil

=

🙀

Composition

Prefer composition over inheritance

Gang of Four, Sandi Metz, et al.

Haskell

Ruby

Haskell

Ruby

Haskell

Ruby

Haskell

Ruby

Haskell

Ruby

Rack works because it's composable

It's composable because functional

}

}

Configuration

Execution

Mocking is required when our decomposition strategy has failed.

Eric Elliott

Layers &

Boundaries

Model:

View:

problem domain objects  ⇄  database

domain objects  →  HTML / JSON

Model:

View:

Validation:

problem domain objects  ⇄  database

domain objects  →  HTML / JSON

user input  →  domain objects

Hanami:

dry-rb:

ROM:

https://hanamirb.org

https://dry-rb.org

http://rom-rb.org

@solnica

Haskell on Rails

or: How I Learned to Stop Worrying and Love the Compiler

James Dabbs

@

Haskell on Rails

By James Dabbs

Haskell on Rails

An introduction to Haskell for Rails developers

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