Create Association in Sequelize to do a Left Join - node.js

Question

I want to do a left join using Sequelize that does the same as this SQL code.
SELECT * FROM events LEFT JOIN zones ON event_tz=zid WHERE event_creator_fk=116;
I have two tables: events and zones (with a list of time zones).
When querying for all the events that are created by a specific user, I also want to get the name of the time zone and other details about the TZ.
I have tried many combinations of solutions by reviewing sample code, other Stack Overflow questions and the documentation as best I can. The query always works, but doesn't do any joins. That is, it below code always returns the list of events, but no time zone data from the zones table. The generated SQL is correct, except it doesn't have the ...LEFT JOIN zones ON event_tz=zid... part.
The below code is wrong. See answers for details.
db.Event.findAll(
{ where: { event_creator_fk: someUserID } },
{ include: [{ model: db.Zone } ]}
);
If I understand correctly, adding associations between tables in sequelize results in an additional column from automatically being created. This is not what I want to do. I do not want Sequelize to modify the tables or database in any way. I want to setup my database and it's tables without Sequelize. Therefore, I am not calling sequelize.sync(). I don't know if there is away to setup associations the way I want.
Model Definitions
module.exports = function (sequelize, DataTypes) {
var Event = sequelize.define('Event', {
eid: {
type: DataTypes.INTEGER,
primaryKey: true
},
event_tz: {
type: DataTypes.INTEGER,
primaryKey: true,
references: "Zone",
referencesKey: "zid"
},
}, {
classMethods: {
associate: function (models) {
return models.Event.hasOne(models.Zone);
}
},
freezeTableName: true,
timestamps: false,
tableName: 'events'
}
);
return Event;
};
module.exports = function (sequelize, DataTypes) {
return sequelize.define('Zone', {
zid: {
type: DataTypes.INTEGER,
primaryKey: true
}
}, {
classMethods: {
associate: function (models) {
return models.Zone.belongsTo(models.Event);
}
},
freezeTableName: true,
timestamps: false,
tableName: 'zones'
});
};
Table Definitions
DROP TABLE IF EXISTS zones;
CREATE TABLE IF NOT EXISTS zones (
zid integer NOT NULL,
country_code character(2) NOT NULL,
zone_name text NOT NULL,
PRIMARY KEY (zid)
);
DROP TABLE IF EXISTS events;
CREATE TABLE IF NOT EXISTS events (
eid BIGSERIAL NOT NULL,
event_tz SERIAL NOT NULL,
PRIMARY KEY (eid),
FOREIGN KEY (event_tz)
REFERENCES zones(zid) MATCH FULL ON DELETE RESTRICT
);

Answer 1

You need to reverse the associations and tell sequelize about your foreign key. belongsTo means 'add the fk to this model':
models.Event.belongsTo(models.Zone, { foreignKey: 'event_tz');
models.Zone.hasOne(models.Event, { foreignKey: 'event_tz');
// or hasMany if this is 1:m

Answer 2

Part of the problem was that I was using the findAll method incorrectly. The query options where and include should have been included as part of the same object. The first parameter to findAll is an options parameter. See here for more details. The correct code should look like the following.
db.Event.findAll(
{
where: { event_creator_fk: someUserID },
include: [{ model: db.Zone } ]
},
);