I have a resource TodoTask that has a many-to-many with a Context like so # in todo_task relationships do has_many :context_relationships, TodoTaskContext do destination_attribute :task_id end many_to_many :contexts, Context do join_relationship :context_relat…

Will do. Edit: done. Added here with a link to a GH repo reproducing it. https://github.com/ash-project/ash_phoenix/issues/384

Looking at your response in GH , it does seem like adding that option auto?: [include_non_map_types?: true does at least handle the specific issue of field.value always being empty. That being said, even with those values present, I’m still having an issue getting this wired up. # task actio…

That doesn’t look like enough to make those things show up as selected to me. options={@contexts |> Enum.map(fn opt -> {opt.name, opt.id} end)} ahhh, okay. So what is happening here is that the argument itself doesn’t contain a value that corresponds to what is currently selected. The value of @f…

Yup, the value of @form[:contexts] is a list of Phoenix.HTML.Form: [ %Phoenix.HTML.Form{ data: %TodoTaskContext{task_id: ^task_id, context_id: ^context_1_id} }, %Phoenix.HTML.Form{ data: %TodoTaskContext{task_id: ^task_id, context_id: ^context_2_id} } …

So it seems like there’s two things that might not be working together correctly. If I leave out the nested form config, I can properly submit my form, BUT the intial field value is always an empty list: # form form = AshPhoenix.Form.for_update(task, :update, as: "task") # render …

@matt-savvy I think the best thing from this point might actually be to make a small reproduction project that we can look at, and/or add some tests for this behavior to AshPhoenix.Form. Then we can just get it all fixed in one fell swoop, and maybe even write a guide on it :smiley:

I think the best thing from this point might actually be to make a small reproduction project that we can look at Yup, I can extend the project I linked yesterday. and/or add some tests for this behavior to AshPhoenix.Form I did try to do that, but since the test resources in AshPhoenix are a…

We can start w/ the project and worry about the tests later :smiley:

Too late, I think I got the tests showing the issue https://github.com/ash-project/ash_phoenix/pull/385 LMK if this is clear.

Elixir Programming Language Forum

Creating forms with change manage_relationship not loading values

Questions & Help Questions

zachdaniel July 2, 2025, 8:48pm 16

Will look shortly, thanks for the test!