Fix Association.Replace() error returning

association.go

@@ -118,7 +118,7 @@ func (association *Association) Replace(values ...interface{}) error {
 
 			if _, pvs := schema.GetIdentityFieldValuesMap(reflectValue, primaryFields); len(pvs) > 0 {
 				column, values := schema.ToQueryValues(rel.FieldSchema.Table, foreignKeys, pvs)
-				tx.Where(clause.IN{Column: column, Values: values}).UpdateColumns(updateMap)
+				association.Error = tx.Where(clause.IN{Column: column, Values: values}).UpdateColumns(updateMap).Error
 			}
 		case schema.Many2Many:
 			var (
@@ -154,7 +154,7 @@ func (association *Association) Replace(values ...interface{}) error {
 				tx.Where(clause.Not(clause.IN{Column: relColumn, Values: relValues}))
 			}
 
-			tx.Delete(modelValue)
+			association.Error = tx.Delete(modelValue).Error
 		}
 	}
 	return association.Error

tests/associations_test.go

@@ -3,6 +3,7 @@ package tests_test
 import (
 	"testing"
 
+	"gorm.io/gorm"
 	. "gorm.io/gorm/utils/tests"
 )
 
@@ -32,6 +33,41 @@ func TestInvalidAssociation(t *testing.T) {
 	}
 }
 
+func TestAssociationNotNullClear(t *testing.T) {
+	type CreditCard struct {
+		gorm.Model
+		Number string
+		UserID uint `gorm:"not null"`
+	}
+
+	type User struct {
+		gorm.Model
+		CreditCards []CreditCard
+	}
+
+	DB.Migrator().DropTable(&User{}, &CreditCard{})
+
+	if err := DB.AutoMigrate(&User{}, &CreditCard{}); err != nil {
+		t.Fatalf("Failed to migrate, got error: %v", err)
+	}
+
+	user := &User{
+		CreditCards: []CreditCard{{
+			Number: "1",
+		}, {
+			Number: "2",
+		}},
+	}
+
+	if err := DB.Create(&user).Error; err != nil {
+		t.Fatalf("Failed to create test data, got error: %v", err)
+	}
+
+	if err := DB.Model(user).Association("CreditCards").Clear(); err == nil {
+		t.Fatalf("No error occured during clearind not null association")
+	}
+}
+
 func TestForeignKeyConstraints(t *testing.T) {
 	type Profile struct {
 		ID       uint