CODEWITHSUNDEEP
elixirphoenix-frameworkecto
webdeb
webdeb

Reputation: 13211

Ecto.Changeset if profile_img_url is not set use gravatar

When a new user registers, I would like to give him an gravatar profile image by default, afterwards he should be able to set it manually, so the changeset method should only apply if profile_img_url is nil

def changeset(model, params \\ :empty) do
  model
  |> cast(...)
  ...
  |> get_gravatar
end

defp get_gravatar(current_changeset) do
  case current_changeset do
    %Ecto.Changeset{valid?: true, *is_nil:* :profile_img_url} ->
         put_change(current_changeset, :profile_img_url, get_somehow_the_gravatar_img(current_changeset))
    _ -> current_changeset
  end
end

So basically, the question is, is this the right way to do it, and is there an Ecto mehtod to check if the value is nil or not. (Not only in the changeset, but also in the db)

Upvotes: 2

Views: 217

Answers (2)

webdeb
webdeb

Reputation: 13211

Found a solution, but I'll not mark it as accepted, to let other people make a better suggestion.

  defp get_gravatar(current_changeset) do
    case current_changeset do
      %Ecto.Changeset{valid?: true, model: %{profile_img_url: nil, email: email}} ->
        put_change(current_changeset, :profile_img_url, to_string(Gravatar.new(email)) <> "?d=identicon")

      _ -> current_changeset
    end
  end

Upvotes: 2

coderVishal
coderVishal

Reputation: 9109

As per my current understanding your implementation is current, you could use an alternative style of code 

  def get_gravatar changeset do
    if changeset.valid? && !(get_field(changeset, :profile_img_url) |> is_nil ) do
      put_change(changeset, :profile_img_url, get_gravatar_image)
    else
      changeset
    end
  end

Upvotes: 2

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