How to convert Array of Struct to List Realm?

Question

i want to convert Array from struct to List Realm .

static func mapGenreResponsetoGenreEntity( input genre: [GenreModel]) -> List {
    var list = List<GenreEntity>()
    
    return  genre.map { result in
        let newGenre =  GenreEntity()
        newGenre.gamesCount = result.gamesCount ?? 0
        newGenre.id = result.id ?? 0
        newGenre.imageBackground = result.imageBackground ?? "Unknown"
        newGenre.name = result.name ?? "Unknown"
        newGenre.slug = result.slug ?? "Unknown"
  
        list.append(newGenre)
  
        return list
    }
}

and the genre is

struct GenreModel: Codable {
  let gamesCount : Int?
  let id : Int?
  let imageBackground : String?
  let name : String?
  let slug : String?
}

How can i convert from array genre (Struct) to List realm which is GenreEntity ?

Please don’t include images or links in your questions. Include code and structures as text so we can use them in answers with copy/paste. See images and links are evil. Images and links are not searchable so they may not be of use to future readers. — Jay
– Jay, Commented Mar 28, 2021 at 13:59

Jay · Accepted Answer · 2021-03-28 14:38:57Z

2

This should just be a matter of adding the new GenreEntity objects to an array and then return the entire array once done.

This should do it

func convertToList(genreArray: [GenreClass]) -> List<GenreEntityRealmModel> {
    let genreEntityList = List<GenreEntityRealmModel>()
    genreArray.forEach { model in
        let genreEntity = GenreEntity()
        genreEntity.gamesCount = model.gamesCount
        genreEntityList.append(genreEntity)
    }
    return genreEntityList
}

edited Mar 28, 2021 at 14:38

answered Mar 28, 2021 at 14:13

Jay

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8 Comments

Jay Over a year ago

@amaulana Glad to help. I also formatted the code in your question to make it readable. There are formatting tools in the editor when asking questions - the brackets {} that format the code can really help keep the code lined up.

aheze Over a year ago

@amaulana also a quick trick is to do Ctrl + i. This re-indents you code.

Abrcd18 Over a year ago

Could you please say how can I convert List<Int> to [Int]? Tried many answers from SO but still can't find solution :(

Jay Over a year ago

@Abrcd18 You probably don't want to don't need to do that. Leaving realm objects as realm objects has some benefits over casting them to a swift array. May I ask why you want/need to do that? You can just do this Array(your realm list) but again, that may not be the best choice depending on the use case.

Jay Over a year ago

@Abrcd18 It's really hard to diagnose issues within comments. This code Array(your realm list) works, 100% of the time and casts a Realm List to an array. However, there are a LOT of downfalls to doing that. It would be best to create a question with a minimal example of the difficulty and an an explanation of what you're trying to do. Do that, link it here and we'll take a look.

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