CompactMapValues not working on this simple dictionary - swift

Question

I have a model that looks like:
public struct Profile {
public let bio: String?
public let company: String
public let createdDate: Date
public let department: String
public let email: String
public let firstName: String
public let coverImageURL: URL?
public let jobTitle: String
public let lastName: String
public let location: String?
public let name: String
public let profileImageURL: URL?
public let roles: [String]
public let isActive: Bool
public let updatedDate: Date?
public let userID: String
public init(
bio: String?, company: String, createdDate: Date, department: String, email: String, firstName: String, coverImageURL: URL?, jobTitle: String,
lastName: String, location: String?, name: String, profileImageURL: URL?, roles: [String], isActive: Bool, updatedDate: Date?, userID: String) {
self.bio = bio
self.company = company
self.createdDate = createdDate
self.department = department
self.email = email
self.firstName = firstName
self.coverImageURL = coverImageURL
self.jobTitle = jobTitle
self.lastName = lastName
self.location = location
self.name = name
self.profileImageURL = profileImageURL
self.roles = roles
self.isActive = isActive
self.updatedDate = updatedDate
self.userID = userID
}
}
extension Profile: Equatable { }
I am trying to create a tuple that represents it as (model: Profile, json: [String: Any])
using the following method -
func makeProfile() -> (model: Profile, json: [String: Any]) {
let updatedDate = Date()
let updatedDateStr = updatedDate.toString(dateFormat: "yyyy-MM-dd'T'HH:mm:ss.SSSXXXXX")
let createdDate = Date()
let createdDateStr = createdDate.toString(dateFormat: "yyyy-MM-dd'T'HH:mm:ss.SSSXXXXX")
let coverImageURL = makeURL("https://headerUri.com")
let profileImageURL = makeURL("https://pictureUri.com")
let model = Profile(
bio: "Some Bio",
company: "Cool Job INC",
createdDate: createdDate,
department: "Engineering",
email: "name#domain.tld",
firstName: "Anne",
coverImageURL: coverImageURL,
jobTitle: "Test Dummy",
lastName: "Employee",
location: "London",
name: "Anne Employee",
profileImageURL: profileImageURL,
roles: ["ADMIN"],
isActive: true,
updatedDate: updatedDate,
userID: UUID().uuidString
)
let json: [String: Any] = [
"bio": model.bio,
"company": model.company,
"createdDate": createdDateStr,
"department": model.department,
"email": model.email,
"firstName": model.firstName,
"headerUri": model.coverImageURL?.absoluteString,
"jobTitle": model.jobTitle,
"lastName": model.lastName,
"location": model.location,
"name": model.name,
"pictureUri": model.profileImageURL?.absoluteString,
"roles": model.roles,
"isActive": model.isActive,
"updatedDate": updatedDateStr,
"userId": model.userID
].compactMapValues { $0 }
return (model: model, json: json)
}
}
extension Date {
func toString(dateFormat format: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = format
return dateFormatter.string(from: self)
}
}
All of the optional properties are showing a warning Expression implicitly coerced from 'String?' to 'Any'
I have added .compactMapValues { $0 } to the dict but has had no effect.
How can I clear this warning?

Answer 1

You're getting an error because you trying to implicitly coerce an optional value (which could be nil) to Any, which hides that the value could be nil.
compactMapValues doesn't guarantee at compile-time that the value is not nil; all the compiler knows is that something that is an optional (like String?) is now treated as a non-optional Any.
One way you could avoid the error is by providing a default value instead of the optional:
let json: [String: Any] = [
"bio": model.bio ?? ""
// ...
]
Alternatively, you can create a dictionary of: [String, Any?] to assign values to, and then use .compactMapValues, which would give you back non-optional values of Any.
let withOptionals: [String: Any?] = [
"bio": model.bio,
// ...
]
let json: [String, Any] = withOptionals.compactMapValues { $0 }

Answer 2

You're getting the warning because the values are optional when you initialize the dictionary. Your .compactMapValues { $0 } won't help because by then it's "too late".
Instead you could initialize an empty dictionary and add the values 1 by 1.
var json = [String: Any]()
json["bio"] = model.bio
json["company"] = model.company
// all of the other values
json["userId"] = model.userID