75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// Пример использования KeyOrder в опциях коллекции — встроенная сортировка ключей при сериализации.
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package main
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import (
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"fmt"
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"log"
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"os"
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"time"
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"direct-dev.ru/gitea/GiteaAdmin/elowdb-go/pkg/linedb"
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)
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// Item — структура для вставки (LineDB поддерживает struct и map)
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type Item struct {
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Name string `json:"name"`
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Value int `json:"value"`
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Active bool `json:"active"`
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Atime string `json:"atime"`
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}
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func main() {
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os.RemoveAll("./data")
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// KeyOrder в опциях коллекции — при задании используется кастомная сериализация с порядком ключей
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initOptions := &linedb.LineDbInitOptions{
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CacheSize: 100,
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CacheTTL: time.Minute,
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DBFolder: "./data",
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Collections: []linedb.JSONLFileOptions{
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{
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CollectionName: "items",
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AllocSize: 256,
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KeyOrder: []linedb.KeyOrder{
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{Key: "id", Order: 0},
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{Key: "atime", Order: -1},
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},
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},
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},
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}
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db := linedb.NewLineDb(nil)
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if err := db.Init(false, initOptions); err != nil {
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log.Fatalf("Init failed: %v", err)
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}
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defer db.Close()
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opts := linedb.LineDbAdapterOptions{}
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// Инсерты: map и структуры (LineDB принимает оба)
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items := []any{
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map[string]any{"Value": 42, "Name": "Test", "Active": true, "atime": "2024-01-01"},
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map[string]any{"Active": false, "Name": "Alice", "Value": 100, "atime": "2024-01-02"},
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map[string]any{"Name": "Bob", "Value": 0, "Active": true, "atime": "2024-01-03"},
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Item{Name: "Charlie", Value: 7, Active: true, Atime: "2024-01-04"},
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Item{Name: "Diana", Value: 99, Active: false, Atime: "2024-01-05"},
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}
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if err := db.Insert(items, "items", opts); err != nil {
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log.Fatalf("Insert failed: %v", err)
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}
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// Read
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all, err := db.Read("items", opts)
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if err != nil {
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log.Fatalf("Read failed: %v", err)
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}
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fmt.Printf("Records: %d\n", len(all))
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for _, r := range all {
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fmt.Printf(" %+v\n", r)
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}
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raw, _ := os.ReadFile("./data/items.jsonl")
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fmt.Printf("\nRaw file:\n%s\n", string(raw))
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}
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