Sequelize - Query to Sequelize methods - mysql

Question

I'm using Sequelize for a node project but I'm having some trouble converting a query in a Sequelize way.
Scenario: I have 2 tables (User and Event) with a n:m relation through UserEvent table. In UserEvent table there is is_creator attribute; what I need is an object with event name, event id and is_creator field.
Example:
[{
id: 1,
name: "Event",
is_creator: true
}]
Here is the query:
SELECT `Event`.`id`,`Event`.`name` as `Name`, `UserEvents`.`is_creator` AS `is_creator` FROM `Events` AS `Event` INNER JOIN (`UserEvents` INNER JOIN `Users` AS `Users` ON `Users`.`id` = `UserEvents`.`UserId`) ON `Event`.`id` = `UserEvents`.`EventId` AND `Users`.`id` = 1;
Unfortunately, I'm unable to "translate" it to Sequelize.
Actual code:
var queryOptions: FindOptions = {
include: [
{
model: db.User,
where: {
id: user.id
}
}
],
};
Query executed:
SELECT `Event`.`id`, `Event`.`uuid`, `Event`.`image`, `Event`.`name`, `Event`.`start_at`, `Event`.`end_at`, `Event`.`location`, `Event`.`description`, `Event`.`createdAt`, `Event`.`updatedAt`, `Users`.`id` AS `Users.id`, `Users`.`uuid` AS `Users.uuid`, `Users`.`email` AS `Users.email`, `Users`.`password` AS `Users.password`, `Users`.`firstName` AS `Users.firstName`, `Users`.`lastName` AS `Users.lastName`, `Users`.`activationCode` AS `Users.activationCode`, `Users`.`resetCode` AS `Users.resetCode`, `Users`.`active` AS `Users.active`, `Users`.`dob` AS `Users.dob`, `Users`.`image` AS `Users.image`, `Users`.`createdAt` AS `Users.createdAt`, `Users`.`updatedAt` AS `Users.updatedAt`, `Users.UserEvent`.`uuid` AS `Users.UserEvent.uuid`, `Users.UserEvent`.`is_creator` AS `Users.UserEvent.is_creator`, `Users.UserEvent`.`createdAt` AS `Users.UserEvent.createdAt`, `Users.UserEvent`.`updatedAt` AS `Users.UserEvent.updatedAt`, `Users.UserEvent`.`UserId` AS `Users.UserEvent.UserId`, `Users.UserEvent`.`EventId` AS `Users.UserEvent.EventId` FROM `Events` AS `Event` INNER JOIN (`UserEvents` AS `Users.UserEvent` INNER JOIN `Users` AS `Users` ON `Users`.`id` = `Users.UserEvent`.`UserId`) ON `Event`.`id` = `Users.UserEvent`.`EventId` AND `Users`.`id` = 1;
Thanks in advance for your cooperation!

Answer 1

Do you want to limit the number of columns that your query is returning?
You can look at the attributes option. You can specify the table fields that you want.
For example, if you want the id, email and firstName of a user, you can specify it this way.
var queryOptions: FindOptions = {
include: [
{
model: db.User,
where: {
id: user.id
},
attributes: ['id', 'email', 'firstName']
}
],
};
You can similarly add the attributes option for the UserEvents table.
PS: I currently, do not have enough reputation to add comments on questions. Otherwise I would've done that.