sushilbansal

sushilbansal

Hi,
I am trying to use Ecto.Enum as following:

 schema "demographics" do
    field :gender, Ecto.Enum,
      values: [
        male: "Male",
        female: "Female",
        other: "Other",
        prefer_not_to_say: "Prefer not to say"
      ]

    field :year_of_birth, :integer
    timestamps(type: :utc_datetime)
  end
  # function to get all the gender options - will be used with select input component
  def get_gender_options() do
    Ecto.Enum.dump_values(__MODULE__, :gender)
  end

It is working fine; it is saving in DB as string (e.g. “Prefer not to say”). Issue occurs when i fetch the db record and display on LiveView. It displays gender as: prefer_not_to_say

How i can get LV to display “Prefer not to say”.

One way i can think of is:

 schema "demographics" do
    field :gender, Ecto.Enum,
      values: [
        :Male,
        :Female,
        :Other,
        :"Prefer not to say"
      ]

    field :year_of_birth, :integer
    timestamps(type: :utc_datetime)
  end

Is there any other way?

Most Liked

LostKobrakai

LostKobrakai

Generally I’d argue that your db representation should be separate from your frontend representation. Just because you store :male runtime value as "Male" in the database doesn’t mean your frontend should render :male as "Male" (applies the same the other direction).

But if you really want to reuse that mapping you can get to it using Ecto.Enum.mappings(schema, :gender).

champeric

champeric

I know some people don’t like using them, but it’s way better in my opinion to use an ENUM if you’re using PostgreSQL. It uses the same space as an int, but it will be readable and better in terms of data integrity (you can’t have a value that doesn’t exist).

There are some caveats, but I never had any problems with them.

CREATE TYPE gender AS ENUM ('male', 'female', 'other');

LostKobrakai

LostKobrakai

Yeah, have two separate mappings. One from atom to frontend string, which can then potentially handle things like localization and another one (the Ecto.Enum one) for atom → db string.

Last Post!

smathy

smathy

Not to mention organizations who use “tableau”-type reporting tools to create their own business reports. Keeping proxy values in sync between your code and not-your-code is a massive PITA.

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