Missing argument for parameter #2 in call to Alamofire.request(URLRequestConvertible) - alamofire

Question

Trying to pass an Authentication header in, using the recommended approach of a custom URLRequestConvertible.
So here is my URLRequestConvertible object that conforms to the protocol:
class SecureJSONRouter : URLRequestConvertible {
var type: String
var token: String
var parameters: [String: AnyObject]
init(typevar: String, tokenvar: String, parametersvar: [String: AnyObject]) {
type = typevar
token = tokenvar
parameters = parametersvar
}
var URLRequest: NSURLRequest {
let URL = NSURL(string: da_url)!
let URLRequesting = NSMutableURLRequest(URL: URL.URLByAppendingPathComponent(type))
let encoding = Alamofire.ParameterEncoding.JSON
URLRequesting.setValue(token, forHTTPHeaderField: "Authorization")
return encoding.encode(URLRequesting, parameters: parameters).0
}
}
It's basically a place to store a few things, like a bit of URL, and a token, and a way to create a NSURLRequest with a full URL, the JSON parameters, and the header field for authorization.
When I try to call it like this:
let myUrlRequest: URLRequestConvertible = SecureJSONRouter(typevar: "locations", tokenvar: token!, parametersvar: parameters)
Alamofire.request(myUrlRequest).response{ (req, resp, data, error) in
if (error != nil) {
println(req)
println(resp)
} else {
println("saved \(data)")
}
}
it won't compile, gives me a "Missing argument for parameter #2 in call" error, at the request line.
Any ideas?
PS: I did have my SecureJSONRouter thingy as the recommended Enum instead of a Class, but I got the same error. I was looking at the protocol definition, and figured there's no reason it can't be a simpler (class) in my case, so I changed it. Still the same error.

Answer 1

I think there's a few possible culprits here. First off, are you sure you're calling Alamofire and not AlamoFire? I've seen people make that mistake before.
As for the sample code you posted, it didn't compile for a few different reasons. I couldn't reproduce exactly the same compiler errors you were seeing, but here's a slightly modified version of you original post that does compile.
class SecureJSONRouter : URLRequestConvertible {
var type: String
var token: String
var parameters: [String: AnyObject]
init(typevar: String, tokenvar: String, parametersvar: [String: AnyObject]) {
type = typevar
token = tokenvar
parameters = parametersvar
}
var URLRequest: NSURLRequest {
let URL = NSURL(string: "http://httpbin.org")!
let URLRequesting = NSMutableURLRequest(URL: URL.URLByAppendingPathComponent(type))
let encoding = Alamofire.ParameterEncoding.JSON
URLRequesting.setValue(token, forHTTPHeaderField: "Authorization")
return encoding.encode(URLRequesting, parameters: parameters).0
}
}
Then here's an example of calling your SecureJSONRouter.
let token: String? = "my_fancy_token"
let parameters: [String: AnyObject] = ["sample_parameter": "sample_parameter_value"]
let myUrlRequest: URLRequestConvertible = SecureJSONRouter(typevar: "locations", tokenvar: token!, parametersvar: parameters)
Alamofire.request(myUrlRequest).response{ (req, resp, data, error) in
if (error != nil) {
println(req)
println(resp)
} else {
println("saved \(data)")
}
}
That is compiling with Xcode 6.1.1 against the Alamofire 1.1.3 release. Hope that helps!