Sequelize - how to define a trigger in a model? - mysql

Question

I am currently working with sequelize on RDS Aurora DB and I need to track which records in which tables were deleted - for this, I created a new table dbLog. Now I need to add a trigger to the database which saves the id of the record into dbLog table whenever that record in table t1 gets deleted. Basically, I need to cover two scenarios for already deployed databases and those who dont yet exist.
Database already exists. This is easy since I can create the trigger by raw query like this
CREATE TRIGGER trigger AFTER DELETE ON t1 FOR EACH ROW
INSERT INTO dbLog ( id, tableName, status, updatedAt )
VALUES (OLD.id, 't1', 'D', NOW())`
Database doesn't exist. This is problematic since it gets created by initiation of the model and then sequelize.sync(). So I cant just call a raw query, instead, I need to define this trigger in the model for t1 table. This is how I initiate the table (simplified)
t1.init(
{
id: {
type: new DataTypes.BIGINT,
autoIncrement: true,
primaryKey: true
},
name: {
type: new DataTypes.STRING,
allowNull: false
}
},
{
sequelize,
tableName: 't1',
}
);
The problem is that I dont know how to create that trigger. I tried putting something like this into the attributes section of t1.Init. But there is some problem, when I check the database for triggers, none was created. How can I fix it? And are even triggers created by this way 1:1 equivalent of triggers created by raw query? Thanks a lot.
hooks: {
afterDestroy: function(t1) {
DbLog.create({
id: t1.id,
tableName: 't1',
status: 'D',
updatedAt: '2015-10-02'
})
}
}

Answer 1

You should create triggers in a DB manually by executing a raw SQL query. If you are using migrations then just create a migration with a trigger creation (also a raw SQL query).