planka/server/db/migrations/20180722005928_create_card_label.js

module.exports.up = knex =>
  knex.schema.createTable('card_label', table => {
    /* Columns */

    table.increments();

    table.integer('card_id').notNullable();
    table.integer('label_id').notNullable();

    table.timestamp('created_at', true);
    table.timestamp('updated_at', true);

    /* Indexes */

    table.unique(['card_id', 'label_id']);
    table.index('label_id');
  });

module.exports.down = knex => knex.schema.dropTable('card_label');