module.exports = (sequelize, DataTypes) => {
    var Ranking = sequelize.define('Ranking', {
        rank: DataTypes.DOUBLE
    });

    Ranking.associate = function (models) {
        models.Ranking.hasOne(models.Tag, { as: 'tagContext' });
        models.Ranking.hasOne(models.Artist, { as: 'artistContext' });
        models.Ranking.belongsToMany(models.Song, { through: 'SongRankings' });
    };

    return Ranking;
};