Name not found in input core component

Questions / Help
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1

Hi! I’m new in Phoenix and Liveview. I’m trying to create a form using a changeset but I don’t know why the input core component can’t find the name, id, value, etc key.

Here is my form:

<.simple_form :let={f} for={@changeset |> dbg()} id="promo-form" phx-change="validate" phx-submit="save">
    <.input field={{f, :first_name} |> dbg()} type="text" label="First Name" />
    <.input field={{f, :email}} type="email" label="Email" phx-debounce="blur" />
    <:actions>
      <.button phx-disable-with="Sending...">Send Promo</.button>
    </:actions>
  </.simple_form>

And here is the error:
key :name not found in: %{changed: nil, given: %{changed: nil, field: {%Phoenix.HTML.Form{source: #Ecto.Changeset<action: nil, changes: %{}, errors: [first_name: {“can’t be blank”, [validation: :required]}, email: {“can’t be blank”, [validation: :required]}], data: #Pento.Promo.Recipient<>, valid?: false>, impl: Phoenix.HTML.FormData.Ecto.Changeset, id: “promo-form”, name: “recipient”, data: %Pento.Promo.Recipient{email: nil, first_name: nil}, hidden: [], params: %{}, errors: [], options: [method: “post”, id: “promo-form”, multipart: false, “phx-change”: “validate”, “phx-submit”: “save”], index: nil, action: nil}, :first_name}, label: “First Name”, type: “text”}, errors: [], field: {%Phoenix.HTML.Form{source: #Ecto.Changeset<action: nil, changes: %{}, errors: [first_name: {“can’t be blank”, [validation: :required]}, email: {“can’t be blank”, [validation: :required]}], data: #Pento.Promo.Recipient<>, valid?: false>, impl: Phoenix.HTML.FormData.Ecto.Changeset, id: “promo-form”, name: “recipient”, data: %Pento.Promo.Recipient{email: nil, first_name: nil}, hidden: [], params: %{}, errors: [], options: [method: “post”, id: “promo-form”, multipart: false, “phx-change”: “validate”, “phx-submit”: “save”], index: nil, action: nil}, :first_name}, id: nil, inner_block: [], label: “First Name”, multiple: false, prompt: nil, rest: %{}, type: “text”}

The core component:

def input(assigns) do
    ~H"""
    <div phx-feedback-for={@name}>
      <.label for={@field.id}><%= @label %></.label>
      <input
        type={@type}
        name={@name}
        id={@id}
...

I don’t know if this is because my changeset is schemaless because I this this component working to register a user for example

defmodule Pento.Promo.Recipient do
  import Ecto.Changeset

  @types %{email: :string, first_name: :string}
  defstruct [:email, :first_name]

  def changeset(%__MODULE__{} = user, attrs) do
    {user, @types}
    |> cast(attrs, Map.keys(@types))
    |> validate_required([:first_name, :email])
    |> validate_format(:email, ~r/@/)
  end
end
2

You would need to also add a name to the input/1. As we see in the component it is expecting @name to be set, so we can pass it in like so:

 <.input name="first_name" field={{f, :first_name}} type="text" label="First Name" />
 <.input name="email" field={{f, :email}} type="email" label="Email" phx-debounce="blur" />
3

After looking at the component, the field should be something like this

  <.input field={f[:email]} label="Email"/>
4

@tomkonidas I add the name then the error is about the value:
Example:
<.input field={{f, :first_name} |> dbg()} name={f.name} type="text" label="First Name" />
Error:
key :value not found in: %{changed: nil, given: %{changed: nil, field: {%Phoenix.HTML.Form{source: #Ecto.Changeset<action: nil, changes: %{}, errors: [first_name: {“can’t be blank”, [validation: :required]}, email: {“can’t be blank”, [validation: :required]}], data: #Pento.Promo.Recipient<>, valid?: false>, impl: Phoenix.HTML.FormData.Ecto.Changeset, id: “promo-form”, name: “recipient”, data: %Pento.Promo.Recipient{email: nil, first_name: nil}, hidden: [], params: %{}, errors: [], options: [method: “post”, id: “promo-form”, multipart: false, “phx-change”: “validate”, “phx-submit”: “save”], index: nil, action: nil}, :first_name}, label: “First Name”, name: “recipient”, type: “text”}, errors: [], field: {%Phoenix.HTML.Form{source: #Ecto.Changeset<action: nil, changes: %{}, errors: [first_name: {“can’t be blank”, [validation: :required]}, email: {“can’t be blank”, [validation: :required]}], data: #Pento.Promo.Recipient<>, valid?: false>, impl: Phoenix.HTML.FormData.Ecto.Changeset, id: “promo-form”, name: “recipient”, data: %Pento.Promo.Recipient{email: nil, first_name: nil}, hidden: [], params: %{}, errors: [], options: [method: “post”, id: “promo-form”, multipart: false, “phx-change”: “validate”, “phx-submit”: “save”], index: nil, action: nil}, :first_name}, id: nil, inner_block: [], label: “First Name”, multiple: false, name: “recipient”, prompt: nil, rest: %{}, type: “text”}

<.label for={@id}><%= @label %></.label>
      <input
        type={@type}
        name={@name}
        id={@id}
        value={Phoenix.HTML.Form.normalize_value(@type, @value)}
        class={[
          "mt-2 block w-full rounded-lg text-zinc-900 focus:ring-0 sm:text-sm sm:leading-6",
          "phx-no-feedback:border-zinc-300 phx-no-feedback:focus:border-zinc-400",
          @errors == [] && "border-zinc-300 focus:border-zinc-400",
          @errors != [] && "border-rose-400 focus:border-rose-400"

And adding a value={f.value} doesn’t fix it.

5

Try passing in your input fields like:

field={f[:key_on_changeset]}
2 Likes
6

:fire: Thanks!