Sending JSON data in the body of an Alamofire Request - swift3

Question

I'm trying to make an api call to submit some data using Alamofire (version 4.0). The trouble i'm having is that when making the call I get a response from the server that the JSON data was not in a valid format.
Is there a way to check if the data data is being serialized correctly in Alamofire?
I have tried many of the solutions currently on StackOverflow and cannot find a solution. Thanks for your help.
This should be the format of the request body:
{
"reference_id": "Test001",
"data": {
"type": "step",
"data": {
"2015-08-02": 8574
}
}
}
My Swift code:
let params: [String:Any] = [
"reference_id": "someName",
"data": [
"type" : "step",
"data": [
"2015-08-02": 8574
]
]
]
print(params)
if let userToken = userToken {
let request = Alamofire.request(url+"API.php?Action=SaveHealthData", method: .post, parameters: params, encoding: JSONEncoding.default).responseString(completionHandler: { response in
print(response)
})
}
The error I'm getting is:
Warning: json_decode() expects parameter 1 to be string, array given in /var/www/html/API/SaveHealthData.php on line 8
{"error":"data not in valid json format"}

Answer 1

Here is the solutions of your problem,
var dataDict : [String : Any] = [:];
dataDict["type"] = "Step"
dataDict["data"] = ["2015-08-02": 8574];
let params: [String:Any] = ["reference_id": "someName",
"data": String.toJSonString(data: dataDict)];
Here toJSonString is an extension of String
static func toJSonString(data : Any) -> String {
var jsonString = "";
do {
let jsonData = try JSONSerialization.data(withJSONObject: data, options: .prettyPrinted)
jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)! as String
} catch {
print(error.localizedDescription)
}
return jsonString;
}
Happy Coding