43 lines
942 B
Elixir
43 lines
942 B
Elixir
defmodule Mobilizon.Events.Tag do
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@moduledoc """
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Represents a tag for events.
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"""
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use Ecto.Schema
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import Ecto.Changeset
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alias Mobilizon.Events.Tag.TitleSlug
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alias Mobilizon.Events.TagRelation
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@type t :: %__MODULE__{
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title: String.t(),
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slug: TitleSlug.Type.t(),
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related_tags: [t]
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}
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@required_attrs [:title, :slug]
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@attrs @required_attrs
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schema "tags" do
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field(:title, :string)
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field(:slug, TitleSlug.Type)
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many_to_many(:related_tags, __MODULE__, join_through: TagRelation)
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timestamps()
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end
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@doc false
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@spec changeset(t, map) :: Ecto.Changeset.t()
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def changeset(%__MODULE__{} = tag, attrs) do
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tag
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|> cast(attrs, @attrs)
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|> TitleSlug.maybe_generate_slug()
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|> validate_required(@required_attrs)
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|> TitleSlug.unique_constraint()
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|> validate_length(:title, min: 2, max: 20)
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|> validate_length(:slug, min: 2, max: 20)
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end
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end
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