db/migrate/20180129213822_create_pokeviewer_pokedex_entries.rb


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class CreatePokeviewerPokedexEntries < ActiveRecord::Migration[5.1]
  def change
    create_table :pokedex_entries do |t|
      t.references :trainer, null: true
      t.references :species, null: true
      t.boolean :caught, null: true, default: false

      t.timestamps
    end

    add_foreign_key :pokedex_entries, :trainers,
      column: :trainer_id

    add_foreign_key :pokedex_entries, :species,
      column: :species_id

    add_index :pokedex_entries, [:trainer_id, :species_id],
      unique: true
  end
end