将 sqlite prepare 转换为自定义模型

Question

我想将结果转换为 ModelA 数组，但没有想出办法。

let query = "SELECT t1.columnA, t2.columnB from table1 as t1, table2 as t2 ..."
let results = try! db.prepare(query) as Array<ModelA>() // I do not know how to cast

模型A：

Struct ModelA: Codable{
let columnA: String
let columnB: String
}

Answer 1

你不能直接投射，尝试在结果上使用map

let models = results.map { ModelA(columnA: [=10=][0], columnB: [=10=][1] }

将 sqlite prepare 转换为自定义模型

Cast sqlite prepare to a custom model

sqlite

swift

sqlite.swift