dorian-marchal
With these modules:
defmodule Foo do
use Ecto.Schema
import Ecto.Changeset
schema "foo" do
field(:name, :string, null: false)
embeds_many(:bars, __MODULE__.Bar, on_replace: :delete)
end
def changeset(model, params \\ %{}) do
model
|> cast(params, [:name])
|> cast_embed(:bars)
|> validate_required([:name, :bars])
end
end
defmodule Foo.Bar do
use Ecto.Schema
embedded_schema do
field(:bar, :string, null: false)
end
end
I expect the following line to return a “can’t be blank” error for the :bars field:
%Foo{} |> Foo.changeset(%{name: "foo"})
But instead, I got a valid changeset.
How can I make sure that :bars is present in the changeset?
I already tried cast_embed(:bars, required: true) but it doesn’t help.
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dorian-marchal
In fact,
:barsis defined:So I don’t get why
%Foo{} |> Shipfixcore.Repo.insertproduces a:But I guess it has nothing to do with
embeds_many.Edit:
I opened an other thread to get help for the underlying issue: How to insert an empty list in a `jsonb` column?
Maybe this one should be closed?
dimitarvp
How about adding it a default value of
[]in the migration?You can then also use
Ecto.Changeset.validate_lengthif you don’t want to allow a non-empty list being inserted or updated, I suppose.dorian-marchal
That’s what I ended up doing
I opened an issue on the Ecto repo to indicate this behaviour: Can't insert an empty list in a `jsonb` column via `embeds_many` · Issue #3324 · elixir-ecto/ecto · GitHub