23 lines
846 B
Elixir
23 lines
846 B
Elixir
defmodule Mobilizon.Repo.Migrations.TagsRelations do
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use Ecto.Migration
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def up do
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create table(:tag_relations, primary_key: false) do
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add :tag_id, references(:tags, on_delete: :delete_all), null: false, primary_key: true
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add :link_id, references(:tags, on_delete: :delete_all), null: false, primary_key: true
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add :weight, :integer, null: false, default: 1
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end
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create constraint(:tag_relations, :no_self_loops_check, check: "tag_id <> link_id")
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create index(:tag_relations, [:tag_id], name: :index_tag_relations_tag_id)
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create index(:tag_relations, [:link_id], name: :index_tag_relations_link_id)
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end
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def down do
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drop constraint(:tag_relations, :no_self_loops_check)
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drop index(:tag_relations, [:tags_id])
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drop index(:tag_relations, [:link_id])
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drop table(:tag_relations)
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end
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end
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