app2-api/modules/comments/comment.model.js

module.exports = function (sequelize, DataTypes) {
    const Comment = sequelize.define('Comment', {
        id: {
            type: DataTypes.UUID,
            defaultValue: DataTypes.UUIDV4,
            primaryKey: true
        },
        entityId: {
            type: DataTypes.UUID,
            allowNull: false,
        },
        entityName: {
            type: DataTypes.STRING,
            allowNull: false,
        },
        content: {
            type: DataTypes.STRING,
            allowNull: false
        },
        nameUserOld: {
            type: DataTypes.STRING(125),
        },
        profile_pictureOld: {
            type: DataTypes.STRING(255),
        },
    }, {
        indexes: [{
            unique: false,
            fields: ['entityId']
        }],
        tableName: 'comments',
        freezeTableName: true,
        timestamps: true,

        defaultScope: {
            include: [{
                model: sequelize.models.User,
                as: 'user',
                attributes: ['name', 'surname', 'profile_picture'],
            }]
        },
    });

    Comment.addScope('onlyEvents', () => {
        return {
            where: {
                entityName: 'event'
            }
        }
    });

    Comment.addScope('onlySpeakers', () => {
        return {
            where: {
                entityName: 'speaker'
            }
        }
    });

    Comment.associate = function (models) {
        Comment.User = Comment.belongsTo(models.User, { foreignKey: 'userId', constraints: false, as: 'user' });
    };



    return Comment;

};