join same table in sequelize and print in excel - node.js

Question

I want to print parent name in excel
this is my code
function getReportT0Print(req, res) {
return new Promise((resolve, reject) => {
Product.findAll({
where: {
$and: [
{
public: true,
visible: true,
ancestry: {
$not: null,
},
},
],
},
include: [
{
model: ormDb.Document,
required: false,
},
],
attributes: ["name", "slug", "folder_path"],
})
.then(function (data) {
// console.log("data" + data.length);
var rows = [];
rows.push(["Product Name", "Slug", "File Path", "Product Parent Name"]);
data.map(function (product) {
rows.push([
product.name,
product.slug,
product.folder_path,
(here i need to print parent name)
]);
});
var workbook = new Excel.Workbook();
var sheet = workbook.addWorksheet("products_with_tags");
sheet.addRows(rows);
resolve(workbook);
return res.send("successfull");
})
.catch(function (err) {
reject(err);
});
});
}
i can print name, slug,folder_path but i don't know how to print parent name in excel file
as parent name is not present but i have given parent_id in place of parent name and want to print parent name
my SQl table look like this
("id" "name" "version" "published" "reviewed" "visible" "public", "parent_id")

Answer 1

You need to register an association between two Product models like this:
Product.belongsTo(Product, { foreignKey: 'parent_id', as: 'parent' });
You can place it in some module outside model's module file where you create Sequelize instance, for example.
To use this association you need to use the same include option as you did with Document:
Product.findAll({
where: {
$and: [
{
public: true,
visible: true,
ancestry: {
$not: null,
},
},
],
},
include: [
{
model: Product,
as: 'parent',
required: false, // or true if parent_id is required field
// or you wish to get all products with parents
attributes: ["name", "slug", "folder_path"],
},
{
model: ormDb.Document,
required: false,
},
],
attributes: ["name", "slug", "folder_path"],
})