forked from opengaussexamples/examples
96 lines
2.3 KiB
Go
96 lines
2.3 KiB
Go
package main
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import (
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"bytes"
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"context"
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"database/sql"
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"fmt"
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"os"
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"time"
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"gitee.com/chentanyang/ogx"
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"gitee.com/chentanyang/ogx/dbfixture"
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"gitee.com/chentanyang/ogx/dialect/ogdialect"
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"gitee.com/chentanyang/ogx/extra/ogxdebug"
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_ "gitee.com/opengauss/openGauss-connector-go-pq"
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)
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type User struct {
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ID int64 `ogx:",pk,autoincrement"`
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Name sql.NullString
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Email string
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Attrs map[string]interface{} `ogx:",nullzero"`
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CreatedAt time.Time
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UpdatedAt sql.NullTime
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}
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type Org struct {
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ID int64 `ogx:",pk,autoincrement"`
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Name string
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OwnerID int64
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Owner *User `ogx:"rel:belongs-to"`
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}
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func main() {
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ctx := context.Background()
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connStr := "host=192.168.20.40 port=26000 user=cuih password=Gauss@123 dbname=test sslmode=disable"
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opengaussdb, err := sql.Open("opengauss", connStr)
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if err != nil {
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panic(err)
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}
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opengaussdb.SetMaxOpenConns(1)
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db := ogx.NewDB(opengaussdb, ogdialect.New())
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db.AddQueryHook(ogxdebug.NewQueryHook(ogxdebug.WithVerbose(true)))
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// Register models before loading fixtures.
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db.RegisterModel((*User)(nil), (*Org)(nil))
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defer func() {
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_ = dropSchema(ctx, db, (*User)(nil), (*Org)(nil))
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}()
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// Automatically create tables.
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fixture := dbfixture.New(db, dbfixture.WithRecreateTables())
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// Load fixtures.
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if err := fixture.Load(ctx, os.DirFS("."), "fixture.yml"); err != nil {
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panic(err)
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}
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// You can access fixtures by _id and by a primary key.
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fmt.Println("Smith", fixture.MustRow("User.smith").(*User))
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fmt.Println("Org with id=1", fixture.MustRow("Org.pk1").(*Org))
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// Load users and orgs from the database.
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var users []User
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var orgs []Org
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if err := db.NewSelect().Model(&users).OrderExpr("id").Scan(ctx); err != nil {
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panic(err)
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}
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if err := db.NewSelect().Model(&orgs).OrderExpr("id").Scan(ctx); err != nil {
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panic(err)
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}
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// And encode the loaded data back as YAML.
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var buf bytes.Buffer
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enc := dbfixture.NewEncoder(db, &buf)
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if err := enc.Encode(users, orgs); err != nil {
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panic(err)
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}
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fmt.Println("")
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fmt.Println(buf.String())
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}
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func dropSchema(ctx context.Context, db *ogx.DB, models ...interface{}) error {
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for _, model := range models {
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if _, err := db.NewDropTable().Model(model).IfExists().Cascade().Exec(ctx); err != nil {
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return err
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}
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}
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return nil
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}
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