How to write this properly with async/await
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How to write this properly with async/await
Newbie web developer here, I am making a project and was suffering a bit of callback hell, so I read a abit and found out about async/await, I tried to use it in my code (in a seed file for my db to try my website but it doesnt seem to be working.
Basically I have categories, sub-categories and prodjucts and I want to create all categories first, then sub-categories and then the products but I can't seem to get it to work in order.
Here is my code:
async function addCats() {
//CREATE CATEGORIES
//async.each(categories, function(category, callback){
for (const category of categories){
await Category.create({name:category}, function(err, createdCategory) {
if(err)
console.log(err);
else {
console.log("Created category ");
}
});
}
}
async function addSubs() {
sub_categories.forEach(function(sub){
//Find the Parents ID
Category.find({name: sub.parent}, function(err, foundParent){
if(err)
console.log(err);
else {
SubCategory.create({name:sub.name, parent:{name: sub.parent, id: foundParent._id}}, function(err,createdSub){
if(err)
console.log(err);
else
console.log("Created sub-category");
})
}
})
})
}
function seedDB(){
Category.remove({}, function(err){
if(err)
console.log(err);
else {
SubCategory.remove({}, function(err){
if(err)
console.log(err);
else {
Product.remove({}, function(err){
if(err)
console.log(err);
else {
addCats();
addSubs();
//CREATE PRODUCTS
products.forEach(function(product){
//Find category ID
Category.find({name:product.category}, function(err, foundCategory){
if(err)
console.log(err);
else {
//Find sub-category ID
SubCategory.find({name:product.sub_category}, function(err, foundSubCategory){
if(err)
console.log(err);
else {
//See if the ID's are linked?
console.log('fsub: ' + foundSubCategory + ' fsubP: ' + foundSubCategory)
if(!foundSubCategory.parent._id.equals(foundCategory._id))
console.log("This is not a valid categories sub-category");
else {
//CREATE PRODUCT
Product.create({name: product.name, category: product.category,
subcategory: product.sub_category, price: product.price, description: product.description
}, function(err, createdProduct){
if(err)
console.log(err);
else
console.log("Created product: " + createdProduct);
})
}
}
})
}
})
})
}
});
}
});
}
});
}
Even if I comment out the last part where I add the products I still cant get the categories to be created first and then the sub-categories, they continue to get created out of order.
Thanks
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