How to set to_form error with a nested property

Phoenix Forum Questions / Help
,
1

Hey folks,

I’m trying to use liveview without Ecto, how can I use a form with a nested property in to_form and how to set errors

I’m trying to do this:

to_form(%{"address" => %{ "line_1" => "" }}, errors: [address: [line_1: :too_short]])

and on the html.heex


<.inputs_for :let={address} for={@form[:address]}>
  <.input
    field={address[:line_1]}
    label="line 1"
    type="text"
  />
</.inputs_for>

The error is never set on form

2

errors is an attr on the input component, so you can supply it manually.

3

The default map based implementation of Phoenix.HTML.FormData only works well for simple, non-nested cases.

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