enum giving error with vapor 4 and fluent - enums

Question

This puzzles me:
I have a model in which I want to use an enum. I first declare the enum:
enum MenuChoices: String, Codable {
case reachableAt
case attentionTo
case reasonVisit
case reasonProblem
}
Then it is in my fields of the class:
#Enum(key: "menu_choices")
var menuChoices: MenuChoices
I then create it in the database using a migration:
struct CreateUserMenu: Migration {
func prepare(on database: Database) -> EventLoopFuture<Void> {
return database.enum("menu_choices")
.case("reachable_at")
.case("attention_to")
.case("reason_visit")
.case("reason_problem")
.create()
.flatMap { menu_choices in
return database.schema("user_menus")
.id()
.field("created_at", .datetime, .required)
.field("updated_at",.datetime, .required)
.field("deleted_at",.datetime)
.field("menu_choices", menu_choices)
.field("be_nl", .string)
.field("be_fr", .string)
.field("en_us", .string)
.create()
}
}
}
So far so good. This migration works and the database looks ok. But when I want to add some data to seed the database in another migration I get an error :
let test = UserMenu( menuChoices: MenuChoices.reachableAt, beNl: "nl", beFr: "fra", enUs: "eng")
let _ = test.save(on: database)
+ App.addUserMenus on default
Would you like to continue?
y/n> y
[ ERROR ] previousError(MySQL error: Server error: Data truncated for column 'menu_choices' at row 1)
Fatal error: Error raised at top level: previousError(MySQL error: Server error: Data truncated for column 'menu_choices' at row 1): file /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-1103.8.25.8/swift/stdlib/public/core/ErrorType.swift, line 200
USSS-Voyager-II:24yours data$
Unfortunately this error doesn’t really help to pinpoint the source of the problem

Answer 1

The problem is that there is no mapping between the swift definition of the enum and the Fluent enum. Putting a string literal value for your swift enum definition that matches the string literal value of the Fluent will fix the problem.
enum MenuChoices: String, Codable {
case reachableAt = "reachable_at"
case attentionTo = "attention_to"
case reasonVisit = "reason_visit"
case reasonProblem = "reason_problem"
}