Sequelize not creating foreign keys on db as expected - node.js

Question

Given this ERD, I'm trying to figure out why foreign keys are not being created on documentChildren and documentAttribute as they each have a column which should be a FK to document.
My sequelize models are all working fine, but i'm curious what i'm doing wrong in that real FK's are not being generated.
document migration:
'use strict'
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('documents', {
id: {
allowNull: false,
primaryKey: true,
type: Sequelize.UUID,
defaultValue: Sequelize.UUIDV4
},
...
})
}
...
}
documentChildren migration:
'use strict'
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('documentChildren', {
id: {
allowNull: false,
primaryKey: true,
type: Sequelize.UUID,
defaultValue: Sequelize.UUIDV4
},
documentId: {
allowNull: false,
type: Sequelize.UUID,
references: {
model: 'documents',
key: 'id'
}
},
...
})
}
...
}
documentAttribute migration:
'use strict'
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('documentAttributes', {
id: {
allowNull: false,
primaryKey: true,
type: Sequelize.UUID,
defaultValue: Sequelize.UUIDV4
},
documentId: {
allowNull: false,
type: Sequelize.UUID,
references: {
model: 'documents',
key: 'id'
}
},
...
})
}
...
}
document model associations:
document.associate = function (models) {
document.hasMany(models.documentAttribute)
document.hasMany(models.documentChildren)
}

Answer 1

Your code shows
"documentId" uuid NOT NULL REFERENCES documents(id)
The REFERENCES documents(id) is the FK. Check postgresql-docs
You are confused with the indexes creation, that does not mean having a FK.