I am trying to setup many to many relationship in Sequelize for my Postgres tables using a tag (lookup) table. I was successful in setting up the relationship.
Now my lookup table, has an additional field which is a foreign key to another table. I want the data for that table to be included in my result set. This is where I am having hard time figuring out the syntax.
My models:
Models.user = sequelize.define('user', { //attributes});
Models.school = sequelize.define('school', { //attributes });
Models.role = sequelize.define('role', { //attributes });
Models.userSchools = sequelize.define('user_school', {
user_school_id: { type: Sequelize.INTEGER, primaryKey: true }
});
Models.user.belongsToMany(Models.school, { through: Models.userSchools, foreignKey: 'user_id', otherKey: 'school_id' });
Models.school.belongsToMany(Models.user, { through: Models.userSchools, foreignKey: 'school_id', otherKey: 'user_id' });
Models.userSchools.belongsTo(Models.role, { foreignKey: 'role_id' });
Working query: This query gives me all the users and their schools.
Models.user.findAll({
where: {
//condition
},
include: [Models.school]
})
Now I want to include the role for each schools. None of the below queries are working.
Models.user.findAll({
where: {
//conditions
},
include: [Models.schools, Models.role]
})
Above query is throwing an error saying role is not associated to user, which is expected.
Models.user.findAll({
where: {
//conditions
},
include: [Models.schools, {model: Models.userSchools, include: Models.role}]
})
This query is also throwing an error:
"userSchools is not associated to user".
Can any one help with syntax to how I can get the role information from the userSchools model?
Edit:
I have add a "through" condition which gets me the role_id but not the related role data.
Models.user.findAll({
where: {
//conditions
},
include: [{
model: Models.school,
as: 'schools',
through: {
attributes: ['role_id']
}
}]
})
Related
I have an Orders and Transactions table.
The id in Orders is to be used in the sellOrderId and buyOrderId columns
To model this in my Orders table I have
static associate({ Transactions }) {
Orders.hasMany(Transactions, { foreignKey: 'buyOrderId', sourceKey: 'id', as: 'buyTransactions' });
Orders.hasMany(Transactions, { foreignKey: 'sellOrderId', sourceKey: 'id', as: 'sellTransactions' });
}
In my Transactions model I have
static associate({ Orders }) {
Transactions.belongsTo(Orders, { foreignKey: 'id', targetKey: 'sellOrderId' });
Transactions.belongsTo(Orders, { foreignKey: 'id', targetKey: 'buyOrderId' });
}
I am attempting to get all Orders along with their associated transactions
I have tried many different queries but they all error out with the same error
EagerLoadingError [SequelizeEagerLoadingError]: Transaction is not associated to Orders!
Currently I have
const orders = await Order.findAll({
include: [
{
model: Transaction,
as: 'buyTransactions'
},
{
model: Transaction,
as: 'sellTransactions'
}
]
});
Regardless of if I have one or both same error, I can see in the database that the relationship exists, Im not sure why sequelize is not honoring this.
I have a few associations between models like so:
Patient.hasMany(Transaction, {
as: 'transactions',
foreignKey: 'patient_id',
sourceKey: 'id'
});
Transaction.belongsTo(Patient, {
as: 'patient',
foreignKey: 'patient_id',
targetKey: 'id'
});
Transaction.hasMany(Transaction, {
as: 'transactions',
foreignKey: 'item_to_pay',
sourceKey: 'id'
});
I'm writing a query to get a list of transactions that belong to a patient and include the models associated with them:
Transaction.findAll({
where: {
patient_id: 1
},
include: [{
model: Patient,
as: 'patient',
attributes: ['first_name']
}, {
model: Transaction,
as: 'transactions',
include: [{
model: Patient,
as: 'patient',
attributes: ['first_name']
}]
}],
});
However when the result returns, it does not include the second nested patient model as I expect it to.
I've also tried writing a different query to see if I can get the desired result:
Transaction.findAll({
where: {
patient_id: 1
},
include: [{
model: Transaction,
as: 'transactions',
include: [{
model: Patient,
as: 'patient',
attributes: ['first_name']
}]
}],
});
But this query errors out and returns 'Unknown column 'patient.id' in field list'.
Does anyone see something wrong with my query or associations? Is there something I'm not understanding about the associations here?
I ended up changing my original query since I couldn't figure it out at the time. I stumbled into the same issue recently and realized the issue came from how I named my associations. I named the transaction.hasMany association as transactions which ended up confusing MySQL with the query that was generated because one of the tables is named transactions.
TLDR, don't name your associations the same name as any of your table names.
I am trying to querying a join table using sequelize:
Here is the model:
db.client.belongsToMany(db.user, {
through: db.clientUser,
onDelete: 'cascade',
});
db.user.belongsToMany(db.client, {
through: db.clientUser,
});
and this is what I am trying to do:
db.user.findAll({
where: {
group_id: 1,
},
include: [{
model: db.clientUser,
where: {
is_manager: 1,
}
}],
raw: true,
})
However I get the following error: client_user is not associated to user!
Any idea what could be the cause of this issue?
You declared a relationship between client from user through clientUser. Although pedantic, its complaint is technically correct: there is no explicitly declared relationship declared between client and clientUser. Nor should there be: your belongsToMany relationship should take care of that. Your query can be adjusted to work with this relationship.
Note: I don't know what tables group_id and is_manager are found in. They may need to be shuffled around.
db.user.findAll({
where: {
group_id: 1,
},
include: [{
model: db.client,
through: {
where: {
is_manager: 1, // Assuming clientUser.is_manager?
},
}],
raw: true,
})
I have a many-to-many relation between User and Device model, through a UserDevice join table:
device.belongsToMany(user, {
through: {
model: userDevice
},
foreignKey: "deviceId",
as: "customers"
});
user.belongsToMany(device, {
through: {
model: userDevice
},
foreignKey: "customerId",
as: "devices"
});
setCustomers: Sequelize.BelongsToManySetAssociationsMixin<UserInstance, string, UserDeviceAttribute>;
getCustomers: Sequelize.BelongsToManyGetAssociationsMixin<UserInstance>;
I can find devices and populate customers correctly with:
this.db.models.Device.findAll({
include: [{
model: User,
as: "customers"
}]
I can't figure out how I can populate customers in other scenarios, i.e. when I'm setting customers manually. Right now I'm trying something like:
return device.setCustomers(customers)
.then(() => {
return device.getCustomers();
})
.then((users) => {
device.setAttributes("customers", users);
return device;
});
but it's not working, setAttributes doesn't set customers field.
The answer is in the question. I found the bug today when encountered same issue.
https://github.com/sequelize/sequelize/blob/master/lib/model.js#L3483
setAttributes seems to be a reserved method for sequelize.
I have a Node entity with a many to many relationship with itself through Edge
var Node = db.define('nodes', {
'name': sequelize.STRING
});
var Edge = db.define('edges', {
'weight': sequelize.STRING
});
Node.hasMany(Node, { as: 'parents', foreignKey: 'parent_id', through: Edge});
Node.hasMany(Node, { as: 'children', foreignKey: 'child_id', through: Edge});
I want to get a nodes children which are created after a specific time using a query like the following
node.getChildren({
include: [Edge],
where: ['createdAt > ?', 1413000965754]
}).complete(function(err, children){
// ...
});
but I cant get it to work.