Sequelize - query on model and related model - OR - node.js

Question

i'm pretty new to Sequelize. I have a scenario in which I want to retrieve records from the DB with filters on the desired model records and his related records. I need to find records that answer the query with properties on the "main" model OR records that answer the query on the related field.
let customers = await db.customers.findAll({
where: {
location: locationId,
some_kind_of_string_identifier: someKindOfStringIdentifier
},
include: [
{
model: db.users,
where: db.sequelize.where(
db.sequelize.fn(
'concat',
db.sequelize.col('first_name'),
' ',
db.sequelize.col('last_name'),
),
db.sequelize.Op.like,
`%${query}%`,
),
},
],
});
So in the example above I have a free text search query (query variable), and I want to get all customers with name like query OR that has "someKindOfStringIdentifier" which matches query.
Is there a way to do so?

Answer 1

I'd try the following:
customers.findAll({
where: {
$and: [{ location: locationId },
{ $or: [{ some_kind_of_string_identifier: someKindOfStringIdentifier },
Sequelize.where(
Sequelize.fn('concat',
Sequelize.col('$db.users.first_name$'), ' ', Sequelize.col('$db.users.last_name$')),
{ like: '%' + query + '%' }
)]
}]
},
include: [{
model: db.users,
required: false
}]
});
Ref: https://stackoverflow.com/a/36287978/5430833, Sequelize: Concat fields in WHERE LIKE clause
Right now, you are effectively doing the WHERE when doing a join. This is not what you want. You want to JOIN both tables (customers and users) and then apply WHERE with your or condition, right?
Above code is untested, but I believe you've got to apply condition in findAll, not the include.