[英]How to insert many records in Realm with Swift?
I am trying to perform a massive insertion of data in Realm, but it is making it very slow. 我正在尝试在Realm中进行大量数据插入,但是这使它非常慢。
This is my code: 这是我的代码:
let realm = try! Realm()
let group = GroupRealm()
group.id = 1
group.name = "test"
try! realm.write {
realm.add(group)
}
var product = [String:AnyObject]()
product["id"] = "" as AnyObject!
product["code"] = ("") as AnyObject!
product["detail"] = ("") as AnyObject!
product["onHand"] = (0) as AnyObject!
product["price"] = (0) as AnyObject!
product["isSerialized"] = (0) as AnyObject!
product["isLotNumber"] = (0) as AnyObject!
var groupProduct = [String:AnyObject]()
groupProduct["group"] = group as AnyObject!
for r in 0..<300 {
realm.beginWrite()
for i in 0..<100 {
product["id"] = "\(i)-\(r)" as AnyObject!
realm.create(ProductRealm.self, value: product, update: true)
groupProduct["id"] = "\(i)-\(r)" as AnyObject!
groupProduct["product"] = product as AnyObject!
realm.create(GroupProductRealm.self, value: groupProduct, update: true)
}
try! realm.commitWrite()
}
Objects: 对象:
class ProductRealm: Object {
public dynamic var id: String = ""
public dynamic var code: String = ""
public dynamic var detail: String = ""
public dynamic var onHand: Int = 0
public dynamic var price: Double = 0
public dynamic var isSerialized: Int = 0
public dynamic var isLotNumber: Int = 0
override static func primaryKey() -> String? {
return "id"
}
}
class GroupProductRealm: Object {
public dynamic var id = ""
public dynamic var group: GroupRealm!
public dynamic var product: ProductRealm!
override static func primaryKey() -> String? {
return "id"
}
}
class GroupRealm: Object {
public dynamic var id = 1
public dynamic var name = ""
public dynamic var update = Date()
override static func primaryKey() -> String? {
return "id"
}
}
The tests on my iphone 5s to insert 30000 records are delayed for more than 30 seconds, whereas in an old project I have with sqlite it takes about 16 seconds. 我在iPhone 5s上插入30000条记录的测试被延迟了30秒以上,而在使用sqlite的旧项目中,该测试大约需要16秒。
I have read that realm is much faster in this than sqlite so I know it is an error of mine, but I do not give with the D: 我已经读过,这个领域比sqlite快得多,所以我知道这是我的错误,但是我不接受D:
Sorry for my English. 对不起我的英语不好。
My level of English is not very high, so I will publish the code with the comments in Spanish, if someone can modify it to be in English I would appreciate it. 我的英语水平不是很高,所以我将用西班牙语发布带有注释的代码,如果有人可以将其修改为英语,我将不胜感激。
https://es.stackoverflow.com/questions/48676/como-insertar-muchos-registros-en-realm-con-swift/48913#48913 https://es.stackoverflow.com/questions/48676/como-insertar-muchos-registros-en-realm-con-swift/48913#48913
//
// ViewController.swift
// TestRealm
//
// Created by Sergio Castro on 10/02/17.
// Copyright © 2017 BasTechSoluctions. All rights reserved.
//
import UIKit
import RealmSwift
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Mostrar la ubicación del proyecto para ubicar la base de datos
print(FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.absoluteString)
DispatchQueue(label: "background").async { //Abrir un nuevo hilo para insertar de forma asíncrona
autoreleasepool {
let date1 = Date() // Inicia el conteo del tiempo
let realm = try! Realm() // Instanciar realm en el hilo nuevo
let products = realm.objects(ProductRealm.self) //Crear una lista de todos los productos
//Crear grupo
let group = GroupRealm()
group.id = 1
group.name = "test"
try! realm.write { //Insertar/Reemplazar grupo, sin productos
realm.create(GroupRealm.self, value: group, update: true)
}
///Crear json
//Primero creo un String, donde ingreso todos los datos en formato [{},{},...]
var stringJson = "["
for i in 0..<30000 {
if(i > 0){ stringJson.append(",") }
let dataOrigin = "{\"id\": \"\(i)\", \"code\": \"\", \"detail\": \"\", \"onHand\": 0, \"price\": 0, \"isSerialized\": 0, \"isLotNumber\": 0}"
stringJson.append("\(dataOrigin)")
}
stringJson.append("]")
//Convertir el String en Datos y luego pasarlo a jsonObject (esto para simular el proceso de descarga de datos)
let data = stringJson.data(using: .utf8)!
let jsonP = try! JSONSerialization.jsonObject(with: data, options: .allowFragments) as! [Any]
//Mostrar el tiempo empleado para la creación del json en consola, el tiempo está en segundos por defecto
let date2 = Date()
var time = date2.timeIntervalSince(date1)
print("Json creation in seconds \(time)")
//Recorrer el json en grupos de 100, tantas veces haga falta para recorrer por completo el json, en este caso 300 veces
let limit = 100
for c in 0..<(jsonP.count / limit){
//Insertar/Reemplazar los grupos de datos
realm.beginWrite()
for i in 0..<limit{
let row = jsonP[i + (c*limit)]
realm.create(ProductRealm.self, value: row, update: true)
}
try! realm.commitWrite()
//Mostrar en consola la cantidad de procesos realizados vs la cantidad de registros actuales
///print("\((c+1)*limit) / \(products.count)") //Este proceso aumenta el tiempo de cálculo
print("\((c+1)*limit)") //Este proceso no afecta mucho el tiempo de cálculo
}
group.products.append(objectsIn: products) //Agregar los productos al grupo, aquí se pueden poner filtros
//Actualizar el grupo, para que el array products tenga una referencia a sus productos correspondientes
try! realm.write {
realm.create(GroupRealm.self, value: group, update: true)
}
// Calcular el tiempo de inserción y mostrarlo en consola
let date3 = Date()
time = date3.timeIntervalSince(date2)
print("Finish time in seconds \(time)")
}
}
}
}
class ProductRealm: Object {
public dynamic var id: String = ""
public dynamic var code: String = ""
public dynamic var detail: String = ""
public dynamic var onHand: Int = 0
public dynamic var price: Double = 0
public dynamic var isSerialized: Int = 0
public dynamic var isLotNumber: Int = 0
override static func primaryKey() -> String? {
return "id"
}
}
class GroupRealm: Object {
public dynamic var id = 1
public dynamic var name = ""
public dynamic var update = Date()
let products = List<ProductRealm>()
override static func primaryKey() -> String? {
return "id"
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.