planka/server/db/migrations/20180721234154_create_project_membership.js

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

    table.increments();

    table.integer('project_id').notNullable();
    table.integer('user_id').notNullable();

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

    /* Indexes */

    table.unique(['project_id', 'user_id']);
    table.index('user_id');
  });

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