How to fetch data by id Swift - swift

Question

So I'm saving data in my database by id to be retrieved by id using http://localhost:8000/albums/whateverId so that is what I'm trying to do in my Swift app, retrieve data by id, by first retrieving all the ids then trying to implement those ids in my url and fetch my data by id.
Fetch all the data (retrieving ids)
class Webservice {
func getAllPosts(completion: #escaping ([Post]) -> ()) {
guard let url = URL(string: "http://localhost:8000/albums")
else {
fatalError("URL is not correct!")
}
URLSession.shared.dataTask(with: url) { data, _, _ in
let posts = try!
JSONDecoder().decode([Post].self, from: data!); DispatchQueue.main.async {
completion(posts)
}
}.resume()
}
}
Variables
struct Post: Codable, Hashable, Identifiable {
let id: String
let title: String
let path: String
let description: String
}
Set the variables to the data from completion(posts) in class Webservice
final class PostListViewModel: ObservableObject {
init() {
fetchPosts()
}
#Published var posts = [Post]()
private func fetchPosts() {
Webservice().getAllPosts {
self.posts = $0
}
}
}
And Here's How I'm Trying To Get The Data By Id By Using The id From The Data I Just Fetched
Here's how I would fetch the data using the url with a certain id
class SecondWebService: Identifiable {
var id:String = ""
init(id: String?) {
self.id = id!
}
func getAllPostsById(completion: #escaping ([PostById]) -> ()) {
guard let url = URL(string: "http://localhost:8000/albums/\(id)")
else {
fatalError("URL is not correct!")
}
URLSession.shared.dataTask(with: url) { data, _, _ in
let posts = try!
JSONDecoder().decode([PostById].self, from: data!); DispatchQueue.main.async {
completion(posts)
}
}.resume()
}
}
Variables
struct PostById: Codable, Hashable, Identifiable {
let id: String
let name: String
let path: String
}
Iterate through my data from PostListViewModel() from the first section and implement id into my class SecondWebService using the url to get data by id
final class PostListViewByIdModel: ObservableObject {
#ObservedObject var model = PostListViewModel()
init() {
fetchPostsById()
}
#Published var postsById = [PostById]()
private func fetchPostsById() {
for post in model.posts {
SecondWebService(id: post.id).getAllPostsById {
self.postsById = $0
print("ALL THAT \($0)")
}
}
}
}
I feel like this code should work but it's not printing anything.