Sequelize include multiple tables in query - mysql

Question

So i have the following structure receipts -> policies -> policholders
Every receipt belongs to a policy and every policy belong to a policyholder
What i want to do is when i fetch receipts i get an object back with the both the policy and policyholder included (i am using feathers-sequelize, hook is included below). I get the error that policyholders is not associated to receipts
Desired response:
{
"ReceiptId": 1,
"Supplement": 10.1,
"policy": {
"PolicyNumber": 1234
},
"policyholder": {
"Name": "Joe",
"Surname": "Blogs"
}
}
Policies model
// See http://docs.sequelizejs.com/en/latest/docs/models-definition/
// for more of what you can do here.
const Sequelize = require("sequelize");
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get("sequelizeClient");
const policies = sequelizeClient.define(
"policies",
{
PolicyId: {
autoIncrement: true,
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
},
PolicyNumber: {
type: DataTypes.STRING(30),
allowNull: true,
},
CompanyId: {
type: DataTypes.INTEGER,
allowNull: true,
},
PolicyholderId: {
type: DataTypes.INTEGER,
allowNull: true,
},
},
{
hooks: {
beforeCount(options) {
options.raw = true;
},
},
}
);
// eslint-disable-next-line no-unused-vars
policies.associate = function (models) {
// Define associations here
// See http://docs.sequelizejs.com/en/latest/docs/associations/
const { policyholders, companies } = models;
policies.belongsTo(policyholders, { foreignKey: "PolicyholderId" });
};
return policies;
};
Policyholder model
// See http://docs.sequelizejs.com/en/latest/docs/models-definition/
// for more of what you can do here.
const Sequelize = require("sequelize");
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get("sequelizeClient");
const policyholders = sequelizeClient.define(
"policyholders",
{
PolicyholderId: {
autoIncrement: true,
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
},
Name: {
type: DataTypes.STRING(250),
allowNull: true,
},
Surname: {
type: DataTypes.STRING(250),
allowNull: true,
},
},
{
hooks: {
beforeCount(options) {
options.raw = true;
},
},
}
);
// eslint-disable-next-line no-unused-vars
policyholders.associate = function (models) {
// Define associations here
// See http://docs.sequelizejs.com/en/latest/docs/associations/
const { policies } = models;
policyholders.hasMany(policies, { foreignKey: "PolicyholderId" });
};
return policyholders;
};
receipts model
// See http://docs.sequelizejs.com/en/latest/docs/models-definition/
// for more of what you can do here.
const Sequelize = require("sequelize");
const DataTypes = Sequelize.DataTypes;
module.exports = function (app) {
const sequelizeClient = app.get("sequelizeClient");
const receipts = sequelizeClient.define(
"receipts",
{
ReceiptId: {
autoIncrement: true,
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
},
PolicyId: {
type: DataTypes.INTEGER,
allowNull: true,
},
Supplement: {
type: DataTypes.INTEGER,
allowNull: true,
},
},
{
hooks: {
beforeCount(options) {
options.raw = true;
},
},
}
);
// eslint-disable-next-line no-unused-vars
receipts.associate = function (models) {
// Define associations here
// See http://docs.sequelizejs.com/en/latest/docs/associations/
const { policies } = models;
receipts.belongsTo(policies, { foreignKey: "PolicyId" });
};
return receipts;
};
get related hook
module.exports = function (options = {}) {
return async (context) => {
const { include, ...query } = context.params.query;
const Policies = context.app.services.policies.Model;
const Policyholders = context.app.services.policyholders.Model;
context.params.sequelize = {
include: [Policies, Policyholders],
raw: false,
};
// Update the query to not include `include`
context.params.query = query;
return context;
};
};

Answer 1

If Placeholders is linked to Receipts through Policies then you need to indicate Placeholders in an include option of Policies itself:
context.params.sequelize = {
include: [{
model: Policies,
include: [Policyholders]
}],
raw: false,
};