app2-api/modules/multimedia/multimedia.model.js

'use strict';

module.exports = function (sequelize, DataTypes) {
    const Multimedia = sequelize.define('Multimedia', {
        id: {
            type: DataTypes.UUID,
            defaultValue: DataTypes.UUIDV4,
            primaryKey: true,
        },
        multimediafileId: {
            type: DataTypes.UUID,
            allowNull: false,
        },
        entityId: {
            type: DataTypes.UUID,
            allowNull: false,
        },
        entityName: {
            type: DataTypes.STRING,
            allowNull: false,
        },
        type: {
            type: DataTypes.STRING,
            allowNull: false,
        },
        /*entity: {
            type: DataTypes.VIRTUAL,
            get: function() {
                const name = this.get('entityName');
                const id = this.get('entityId'); 
                let modelName = '';
                switch (name) {
                    case 'post':
                        modelName = 'Post';
                        break;
                        
                    case 'speaker':
                        modelName = 'Speaker'
                        break;

                    case 'event':
                        modelName = 'Event';
                        break;

                    default:
                        break;
                }

                return sequelize.models[modelName].findByPk(id).then(function(result) { return result });
            }
            
        }*/
    }, {
        indexes: [{
            unique: false,
            fields: ['entityId']
        }],
        tableName: 'multimedias',
        freezeTableName: true,
        timestamps: true,
    });

    Multimedia.associate = function (models) {
        Multimedia.MultimediaFile = Multimedia.belongsTo(models.MultimediaFile, { foreignKey: 'multimediafileId' });
    };

    return Multimedia;
};