[SR-9279] JSONEncoder with dateEncodingStrategy of millisecondsSince1970 produces Float type in resulting JSON #3587
Description
| Previous ID | SR-9279 |
| Radar | None |
| Original Reporter | rkhalili (JIRA User) |
| Type | Bug |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Foundation |
| Labels | Bug, Codable |
| Assignee | None |
| Priority | Medium |
md5: 26375280f8cb81c834f177bb618146aa
Issue Description:
When JSON-encoding a dictionary with a Date object, and specifying millisecondsSince1970 for the date encoding strategy, the resulting encoded value for the Date object is a floating point number with some amount of decimal places, instead of an integer representing milliseconds. This doesn't seem correct, I feel like this can cause incompatibility with systems or APIs that don't expect floats for millisecond values (which was the case for my company's Java back-end API).
To reproduce:
let test = ["key": Date()]
let encoder = JSONEncoder()
encoder.dateEncodingStrategy = .millisecondsSince1970
if let result = try? encoder.encode(test) {
if let backToString = String(data: result, encoding: .utf8) {
print("JSON: " + backToString)
}
}
Expected output:
JSON: {"key":1542355551611}Actual output:
JSON: {"key":1542355551611.2129}