Questions & Help>Questions

Set an Attribute within an Action

/ash#ash-actions
BryanJBryce

BryanJBryce

I have a Resource that has an Attribute called type that is an enum.

I’m creating separate create Actions for each type and so want to set the type in the action itself since we know it.

    attribute :type, :atom do
      constraints one_of: [:paragraph, :image, :table, :citation]
      allow_nil? false
    end

    create :create_paragraph do
      argument :order, :integer, allow_nil?: false
      argument :body, :string, allow_nil?: false
    end

I want to set the Attribute type to :paragraph

2 comments
/ash#ash-actions
590 2

Showing Posts 2 to 1

BryanJBryce

BryanJBryce OP

Thank you!

For completeness this is what my action looks like in working condition:

    create :create_paragraph do
      argument :order, :integer, allow_nil?: false
      argument :body, :string, allow_nil?: false

      change set_attribute(:order, arg(:order))
      change set_attribute(:type, :paragraph)
    end
1
Post #2
jimsynz

jimsynz

Ash Core Team

You can definitely do change set_attribute(:type, :paragraph).

1
Post #1
— All posts loaded —

Where Next? Top

View thread on forum (has 2 replies!)
ash
ash-actions
Home Questions & Help>Questions
2 473 2
Last post
REPLY VIEW THREAD WITH 2 POSTS

Trending in Questions Top

katta
Questions & Help>Questions

Phoenix Ecto realistic benchmarks
I having some trouble figuring out if I have set myself too strict of standards for my production server. Currently I can handle 75% of r...
/phoenix#ecto#troubleshooting
2 1863 12
New
achenet
Questions & Help>Questions

No Tailwind binary for FreeBSD
Hello, I’m trying to build a basic Phoenix web-app, and I’d like to use Tailwind. However, when I launch mix phx.server, I get an error...
/phoenix#freebsd#tailwindcss#tailwind
11 1073 14
New
kpanic
Questions & Help>Questions

"Mentoring" match maker? maybe MVP
Hi everyone, I am toying with the idea of building a “match maker” for giving personal help to people that wants to start coding. I sta...
#helpers#programming
8 940 4
New
Cxx-mlr
Questions & Help>Questions

Using try/catch with update_in/3
I’m working on a small exercise involving update_in/3, and I came up with this solution: data = %{ name: "Periodic Table", category:...
#learning-elixir
9 273 12
New
ChrisAmelia
Questions & Help>Questions

Need help understanding order of function calls from Phoenix auth
I’ve got trouble wrapping my head around the order in which functions are called in this snippet (from Phoenix’s authentication): toke...
/phoenix#learning-elixir
0 76 2
New
dillonoconnor
Questions & Help>Questions

Hologram compiler and iex -S mix
Is there any way to avoid the Hologram compiler running when using iex? It seems like the front-end code could potentially be disregarded...
/hologram#iex
2 386 3
New
thiagogsr
Questions & Help>Questions

Oban Worker max_attempts doesn't compile with a constant
** (ArgumentError) expected :max_attempts to be a positive integer, got: {:@, [line: 10, column: 19], [{:max_attempts, [line: 10, column:...
/oban
0 66 1
New

Other Trending Topics Top

GenericJam
News>Announcing

Mob - Native BEAM / Elixir on Native Mobile
Edit: 2026 May 15 - This post is archived. Mob is alive!! Main docs: mob v0.7.11 — Documentation A bit of explanation for the slightly c...
/mob#library#beam#mobile#liveview#react-native#mobile-app#mobile-development
259 8396 111
New
mudasobwa
Chat & Discussions>Discussions

Cure - a new language compiled to BEAM
I am happy to introduce the very α version of the new programming language compiled to BEAM. Welcome Cure. It has literally three kille...
#static-types#type-checking#types#fsm
171 6315 70
New
garrison
News>Announcing

Hobbes - a low-level distributed database for the Elixir programming language
Hobbes is a low-level distributed database for the Elixir programming language. Hobbes provides a simple, safe, and scalable storage lay...
#library#database#distributed#hobbes
306 6242 88
New
budgie
Chat & Discussions>Discussions

I genuinely hate programming now
A little off-topic, but I feel like people here have a good head on their shoulders. I used to be quite good at making software. Was luc...
#ai#career#rant
460 3763 113
New
KristerV
Chat & Discussions>AI / LLMs

State of developing agents with Elixir (not coding agents)
Hey. Is there anyone here who creates agents in their apps? Not talking about using agents, but creating them. I’m finding it pretty diff...
#agent#ai#llm#dev-tools#ai-tools
31 3653 21
New
mcass19
News>Announcing

ExRatatui - Elixir bindings for the Rust ratatui terminal UI library
ExRatatui lets you cook up rich terminal UIs in Elixir, powered by Rust’s ratatui via Rustler NIFs. Build interactive terminal applicatio...
#library#rust#terminal#tui
60 3370 16
New
Back to top

Latest Ash Threads

Ash Forum ❯

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

Software Mansion

Phoenix, LiveView, multimedia pipelines, distributed systems. 400 engineers, Elixir since 2017. Available for hire.

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Honeybadger

Error tracking, logs, uptime, and Just Enough APM. Built for developers.

Code Sync

Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

WyeWorks

**Building the future of software with AI, trust, and human connection.**

Software Mansion

The team behind Membrane, Popcorn, LiveDebugger. Available for hire.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Popular Tags

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Honeybadger

Error tracking, logs, uptime, and Just Enough APM. Built for developers.

Code Sync

Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

WyeWorks

**Building the future of software with AI, trust, and human connection.**

Software Mansion

The team behind Membrane, Popcorn, LiveDebugger. Available for hire.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement

Options

Thread Display Mode




Thread Preview

Skip Thread Previews