


Is there a way to do BeforeCreate and BeforeUpdate hooks for each structure within a structure?
I have the following code:
type innerstructa struct { a string } type innerstructb struct { b string } func (a *a) beforecreate(scope *gorm.scope) error { return scope.setcolumn("a", uuid.new().string()) } func (b *b) beforecreate(scope *gorm.scope) error { return scope.setcolumn("b", uuid.new().string()) } type outerstruct struct { innerstructa innerstructb id string `gorm:"type:varchar(40);not null"` }
When I create the record:
outerStructObject := OuterStruct{ ID: "sample_ID", } err := db.Create(&outerStructObject).Error
Only call one of the beforecreate() hooks. Other beforecreate are skipped.
gorm version is jinzhu/gorm v1.9.16
Is there a way to call both hooks when calling the create statement?
Expected beforecreate hooks to be called for two inner structures - innerstructa and innerstructb.
Correct answer
peter's comment is accurate, I will share my tests and comments here but using the official repositorygo -gorm/ gorm and the latest version v1.25.0
have very similar results and some changes in the api.
When creating an external registry, the internal object can be set like this:
func (o *outerstruct) beforecreate(tx *gorm.db) error { fmt.println("hook triggered: beforecreate for outerstruct") o.innerstructa.a = uuid.new().string() o.innerstructb.b = uuid.new().string() return nil }
To trigger internal object hooks, you can only create them directly:
innera := innerstructa{ a: "123", } errcreateinner := db.create(&innera).error
This is a complete isolated example:
package main import ( "fmt" "log" "github.com/google/uuid" "gorm.io/driver/sqlite" "gorm.io/gorm" ) func main() { db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{}) if err != nil { panic(err) } db.AutoMigrate(&InnerStructA{}, &InnerStructB{}, &OuterStruct{}) outerStructObject := OuterStruct{ ID: "sample_ID", } errCreate := db.Create(&outerStructObject).Error if err != nil { log.Fatal(errCreate) } var outer OuterStruct db.Last(&outer) fmt.Println("Last register: ", outer) // innerA := InnerStructA{ // A: "123", // } // errCreateInner := db.Create(&innerA).Error // if err != nil { // log.Fatal(errCreateInner) // } } type InnerStructA struct { A string } type InnerStructB struct { B string } // This is not being called func (a *InnerStructA) BeforeCreate(tx *gorm.DB) error { fmt.Println("Hook triggered: BeforeCreate for InnerStructA") // ... return nil } // This is not being called func (b *InnerStructB) BeforeCreate(tx *gorm.DB) error { fmt.Println("Hook triggered: BeforeCreate for InnerStructB") // ... return nil } // This works! func (o *OuterStruct) BeforeCreate(tx *gorm.DB) error { fmt.Println("Hook triggered: BeforeCreate for OuterStruct") o.InnerStructA.A = uuid.New().String() o.InnerStructB.B = uuid.New().String() return nil } type OuterStruct struct { InnerStructA InnerStructB ID string `gorm:"type:varchar(40);not null"` }
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