30 lines
809 B
Elixir
30 lines
809 B
Elixir
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defmodule Rsh26pool.Voting.Vote do
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@moduledoc """
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A single vote cast by a participant for an idea. A participant may vote for a
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given idea at most once (enforced by a unique index).
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"""
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use Ecto.Schema
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import Ecto.Changeset
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alias Rsh26pool.Voting.{Idea, Participant}
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schema "votes" do
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belongs_to :idea, Idea
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belongs_to :participant, Participant
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timestamps(type: :utc_datetime)
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end
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def changeset(vote, attrs) do
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vote
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|> cast(attrs, [:idea_id, :participant_id])
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|> validate_required([:idea_id, :participant_id])
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|> unique_constraint([:idea_id, :participant_id],
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name: :votes_idea_id_participant_id_index,
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message: "は既に投票済みです"
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)
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|> foreign_key_constraint(:idea_id)
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|> foreign_key_constraint(:participant_id)
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end
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end
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