initial import

microservices/gorm-relation/go.mod

@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/gormrelation
+
+go 1.14
+
+require github.com/jinzhu/gorm v1.9.14

microservices/gorm-relation/go.sum

@@ -0,0 +1,32 @@
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microservices/gorm-relation/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+type Customer struct {
+	gorm.Model
+	FirstName    string
+	LastName     string
+	CreditCard   CreditCard
+	CreditCardId uint
+}
+
+type CreditCard struct {
+	gorm.Model
+	Number string
+}
+
+func main() {
+	db, err := gorm.Open("sqlite3", "test.db")
+	if err != nil {
+		panic("failed to connect database")
+	}
+	defer db.Close()
+
+	// LogMode enable
+	db.LogMode(true)
+
+	// Migrate the schema
+	db.AutoMigrate(&CreditCard{}, &Customer{})
+
+	// Create
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	customer.CreditCard = CreditCard{Number: "123-123-123"}
+	db.Set("gorm:association_autoupdate", false).Set("gorm:association_autoupdate", true).Create(&customer)
+
+	var foundCustomer Customer
+	var foundCreditCard CreditCard
+
+	db.Where(&Customer{FirstName: "Hans"}).First(&foundCustomer)
+	db.Model(&foundCustomer).Related(&foundCreditCard)
+
+	fmt.Println("Gefunden wurde:", foundCreditCard.Number)
+
+	db.Delete(&foundCustomer)
+
+}