Search a dictionary in a custom object inside an array - arrays

Question

I’m building search functionality. I have an array of User objects and each User has a dictionary of tags. I’m trying to return users with searched tags.
My user class is:
class User: NSObject {
var name: String?
var tags = Dictionary<String, String>()
}
An example of the tags is:
tags: {
“entry1” : “test1”,
“entry2” : “test2”,
“entry3” : “test3”
}
I’ve been trying variances of:
let predicate = NSPredicate(format: “tags contains[c] %#", “test1”);
let filteredArray = self.usersArray!.filter { predicate.evaluate(with: $0) }; print(“users = ,\(filteredArray)");
It’s throwing “this class is not key value coding-compliant for the key tags.’ I'm not sure how to search inside the User object.
Update:
I've change the dictionary to an array and
filter { $0.tags.contains(searchTerm) } works for exact search match, as suggested.
.filter( {$0.tags.reduce(false, {$1.contains(searchTerm)} )} ) does not work for a partial match however, which is what i'm looking for.
Here is what is printed:
Search term: ale
Result: []
Tags array inside each object:
["Alex", "Will", ""]
["Bob", "Dan", ""]
["First", "Second", "Third"]
["Testing 1", "Testing 2", ""]

Answer 1

Your implementation of tags seems cumbersome. Here is a simpler one.
class User {
var name: String
var tags: [String]
}
Now let's say you have an array of users in users.
var users: [User]
// Store users in the array
Now, this is how you check which user contains a particular tag.
let tag = "yourTag"
users.filter( { $0.tags.contains(tag) } )
However, if you are adamant that you need the tags in a dictionary, then you could do it like this,
users.filter( {$0.tags.values.contains(tag)} )
If you want to check if the tag is part of any of the tags in a particular user, you could do it like this,
let filteredUsers = users.filter( {$0.tags.reduce(false, {$1.contains(tag)} )} )
P.S - we don't use ; in Swift.

Answer 2

It's good practice to make your models conform to Codeable:
struct User: Codable {
var userId: UUID
var name: String = ""
var referenceTags: [String: String] = [:]
}
// Create some users:
let Bob = User(userId: UUID(), name: "Bob", referenceTags: ["tag1": "no", "tag2": "yes"])
let Steve = User(userId: UUID(), name: "Steve", referenceTags: ["tag2": "no", "tag3": "no"])
Create an array of users to filter.
let users:[User] = [Bob, Steve]
Get a search predicate or string from your Search bar or other.
let searchPredicate = "yes"
Filter and iterate over tags for the required value.
let results = users.filter { (user) -> Bool in
for (key, _) in user.referenceTags.enumerated() {
if (user.referenceTags[key] == searchPredicate) {
return true
}
}
}