Question to the Ash gurus: in the same way Ecto schemas can have virtual fields (e.g. by passing the virtual: true option, so that those fields are part of the schema/struct but not persisted to the database), does Ash have a similar concept for attributes? e.g. attributes do # Core data, persist…

Ash has three concepts that map to the concept of a virtual field. Often, virtual fields exist to simulate one of these three things Arguments Arguments are action-specific inputs. For example: create :register do accept [:email] argument :password, :string, allow_nil?: false argument :confi…

Great, thanks very much @zachdaniel , appreciate the thorough answer! I was looking in the wrong place, it hadn’t clicked with me that there were some action-specific approaches rather than defining them as part of the attribute block.

Hmm…not really. You could use the value of a metadata field, with something like value={form.source.data.__metadata__[:metadata_field]}, and then you’d have an argument w/ the same name as that metadata that sets the metadata accordingly. But I’m not sure why you’d want to do that.

I have added custom_fields which has an array of multiple fields. I want to dynamically add each field to the form so can use it like <.input field={@form[:custom_field_id]} /> Here’s the structure of the data: %Resource{ Id: UUID STRING, title: "just a test", custom_fields: [ %…

Where do your custom field values get stored? I assume in a map-typed attribute in the resource? And then to accept them as input you’d need to accept a map of custom field values too? So then you could do things like (just as a potential example) <.input name={@form[:field].name <> “[field_1]”} id…

Correct. They are stored in an {:array, :map} attribute. I wanted to make a custom_field the like an attribute on a resource, but your proposal works for now. Thanks for the proposal.

Elixir Programming Language Forum

Virtual attributes mirroring Ecto's virtual fields

Questions & Help Questions

kamaroly September 22, 2024, 8:25pm 4

Can a metadata attribute be used in AshPhoenix Form?