Add more updates test

association.go

@@ -86,6 +86,14 @@ func (association *Association) Replace(values ...interface{}) error {
 		case schema.BelongsTo:
 			if len(values) == 0 {
 				updateMap := map[string]interface{}{}
+				switch reflectValue.Kind() {
+				case reflect.Slice, reflect.Array:
+					for i := 0; i < reflectValue.Len(); i++ {
+						rel.Field.Set(reflectValue.Index(i), reflect.Zero(rel.Field.FieldType).Interface())
+					}
+				case reflect.Struct:
+					rel.Field.Set(reflectValue, reflect.Zero(rel.Field.FieldType).Interface())
+				}
 
 				for _, ref := range rel.References {
 					updateMap[ref.ForeignKey.DBName] = nil

callbacks/associations.go

@@ -24,6 +24,13 @@ func SaveBeforeAssociations(db *gorm.DB) {
 					if !ref.OwnPrimaryKey {
 						pv, _ := ref.PrimaryKey.ValueOf(elem)
 						ref.ForeignKey.Set(obj, pv)
+
+						if dest, ok := db.Statement.Dest.(map[string]interface{}); ok {
+							dest[ref.ForeignKey.DBName] = pv
+							if _, ok := dest[rel.Name]; ok {
+								dest[rel.Name] = elem.Interface()
+							}
+						}
 					}
 				}
 			}

callbacks/callbacks.go

@@ -37,6 +37,7 @@ func RegisterDefaultCallbacks(db *gorm.DB, config *Config) {
 
 	updateCallback := db.Callback().Update()
 	updateCallback.Match(enableTransaction).Register("gorm:begin_transaction", BeginTransaction)
+	updateCallback.Register("gorm:setup_reflect_value", SetupUpdateReflectValue)
 	updateCallback.Register("gorm:before_update", BeforeUpdate)
 	updateCallback.Register("gorm:save_before_associations", SaveBeforeAssociations)
 	updateCallback.Register("gorm:update", Update)

callbacks/query.go

@@ -37,6 +37,19 @@ func Query(db *gorm.DB) {
 func BuildQuerySQL(db *gorm.DB) {
 	clauseSelect := clause.Select{}
 
+	if db.Statement.ReflectValue.Kind() == reflect.Struct {
+		var conds []clause.Expression
+		for _, primaryField := range db.Statement.Schema.PrimaryFields {
+			if v, isZero := primaryField.ValueOf(db.Statement.ReflectValue); !isZero {
+				conds = append(conds, clause.Eq{Column: clause.Column{Table: db.Statement.Table, Name: primaryField.DBName}, Value: v})
+			}
+		}
+
+		if len(conds) > 0 {
+			db.Statement.AddClause(clause.Where{Exprs: conds})
+		}
+	}
+
 	if len(db.Statement.Selects) > 0 {
 		for _, name := range db.Statement.Selects {
 			if db.Statement.Schema == nil {

callbacks/update.go

@@ -9,6 +9,25 @@ import (
 	"github.com/jinzhu/gorm/schema"
 )
 
+func SetupUpdateReflectValue(db *gorm.DB) {
+	if db.Error == nil {
+		if !db.Statement.ReflectValue.CanAddr() || db.Statement.Model != db.Statement.Dest {
+			db.Statement.ReflectValue = reflect.ValueOf(db.Statement.Model)
+			for db.Statement.ReflectValue.Kind() == reflect.Ptr {
+				db.Statement.ReflectValue = db.Statement.ReflectValue.Elem()
+			}
+
+			if dest, ok := db.Statement.Dest.(map[string]interface{}); ok {
+				for _, rel := range db.Statement.Schema.Relationships.BelongsTo {
+					if _, ok := dest[rel.Name]; ok {
+						rel.Field.Set(db.Statement.ReflectValue, dest[rel.Name])
+					}
+				}
+			}
+		}
+	}
+}
+
 func BeforeUpdate(db *gorm.DB) {
 	if db.Error == nil && db.Statement.Schema != nil && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeUpdate) {
 		tx := db.Session(&gorm.Session{})
@@ -114,21 +133,20 @@ func AfterUpdate(db *gorm.DB) {
 func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 	var (
 		selectColumns, restricted = SelectAndOmitColumns(stmt, false, true)
-		reflectModelValue         = reflect.Indirect(reflect.ValueOf(stmt.Model))
 		assignValue               func(field *schema.Field, value interface{})
 	)
 
-	switch reflectModelValue.Kind() {
+	switch stmt.ReflectValue.Kind() {
 	case reflect.Slice, reflect.Array:
 		assignValue = func(field *schema.Field, value interface{}) {
-			for i := 0; i < reflectModelValue.Len(); i++ {
+			for i := 0; i < stmt.ReflectValue.Len(); i++ {
-				field.Set(reflectModelValue.Index(i), value)
+				field.Set(stmt.ReflectValue.Index(i), value)
 			}
 		}
 	case reflect.Struct:
 		assignValue = func(field *schema.Field, value interface{}) {
-			if reflectModelValue.CanAddr() {
+			if stmt.ReflectValue.CanAddr() {
-				field.Set(reflectModelValue, value)
+				field.Set(stmt.ReflectValue, value)
 			}
 		}
 	default:
@@ -136,7 +154,12 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 		}
 	}
 
-	switch value := stmt.Dest.(type) {
+	updatingValue := reflect.ValueOf(stmt.Dest)
+	for updatingValue.Kind() == reflect.Ptr {
+		updatingValue = updatingValue.Elem()
+	}
+
+	switch value := updatingValue.Interface().(type) {
 	case map[string]interface{}:
 		set = make([]clause.Assignment, 0, len(value))
 
@@ -148,8 +171,12 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 
 		for _, k := range keys {
 			if field := stmt.Schema.LookUpField(k); field != nil {
-				if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
+				if field.DBName != "" {
-					set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value[k]})
+					if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
+						set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value[k]})
+						assignValue(field, value[k])
+					}
+				} else if v, ok := selectColumns[field.Name]; (ok && v) || (!ok && !restricted) {
 					assignValue(field, value[k])
 				}
 			} else if v, ok := selectColumns[k]; (ok && v) || (!ok && !restricted) {
@@ -167,13 +194,13 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 			}
 		}
 	default:
-		switch stmt.ReflectValue.Kind() {
+		switch updatingValue.Kind() {
 		case reflect.Struct:
 			set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
 			for _, field := range stmt.Schema.FieldsByDBName {
-				if !field.PrimaryKey || (!stmt.ReflectValue.CanAddr() || stmt.Dest != stmt.Model) {
+				if !field.PrimaryKey || (!updatingValue.CanAddr() || stmt.Dest != stmt.Model) {
 					if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
-						value, isZero := field.ValueOf(stmt.ReflectValue)
+						value, isZero := field.ValueOf(updatingValue)
 						if !stmt.DisableUpdateTime {
 							if field.AutoUpdateTime > 0 {
 								value = stmt.DB.NowFunc()
@@ -187,7 +214,7 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 						}
 					}
 				} else {
-					if value, isZero := field.ValueOf(stmt.ReflectValue); !isZero {
+					if value, isZero := field.ValueOf(updatingValue); !isZero {
 						stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
 					}
 				}
@@ -195,16 +222,15 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 		}
 	}
 
-	if !stmt.ReflectValue.CanAddr() || stmt.Dest != stmt.Model {
+	if !updatingValue.CanAddr() || stmt.Dest != stmt.Model {
-		reflectValue := reflect.Indirect(reflect.ValueOf(stmt.Model))
+		switch stmt.ReflectValue.Kind() {
-		switch reflectValue.Kind() {
 		case reflect.Slice, reflect.Array:
 			var priamryKeyExprs []clause.Expression
-			for i := 0; i < reflectValue.Len(); i++ {
+			for i := 0; i < stmt.ReflectValue.Len(); i++ {
 				var exprs = make([]clause.Expression, len(stmt.Schema.PrimaryFields))
 				var notZero bool
 				for idx, field := range stmt.Schema.PrimaryFields {
-					value, isZero := field.ValueOf(reflectValue.Index(i))
+					value, isZero := field.ValueOf(stmt.ReflectValue.Index(i))
 					exprs[idx] = clause.Eq{Column: field.DBName, Value: value}
 					notZero = notZero || !isZero
 				}
@@ -215,7 +241,7 @@ func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
 			stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Or(priamryKeyExprs...)}})
 		case reflect.Struct:
 			for _, field := range stmt.Schema.PrimaryFields {
-				if value, isZero := field.ValueOf(reflectValue); !isZero {
+				if value, isZero := field.ValueOf(stmt.ReflectValue); !isZero {
 					stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
 				}
 			}

schema/field.go

@@ -347,6 +347,8 @@ func (field *Field) setupValuerAndSetter() {
 					if v.Type().Elem().Kind() == reflect.Struct {
 						if !v.IsNil() {
 							v = v.Elem()
+						} else {
+							return nil, true
 						}
 					} else {
 						return nil, true

tests/associations_test.go

@@ -8,7 +8,7 @@ import (
 
 func AssertAssociationCount(t *testing.T, data interface{}, name string, result int64, reason string) {
 	if count := DB.Model(data).Association(name).Count(); count != result {
-		t.Errorf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
+		t.Fatalf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
 	}
 
 	var newUser User
@@ -20,7 +20,7 @@ func AssertAssociationCount(t *testing.T, data interface{}, name string, result
 
 	if newUser.ID != 0 {
 		if count := DB.Model(&newUser).Association(name).Count(); count != result {
-			t.Errorf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
+			t.Fatalf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
 		}
 	}
 }
@@ -28,6 +28,6 @@ func AssertAssociationCount(t *testing.T, data interface{}, name string, result
 func TestInvalidAssociation(t *testing.T) {
 	var user = *GetUser("invalid", Config{Company: true, Manager: true})
 	if err := DB.Model(&user).Association("Invalid").Find(&user.Company).Error; err == nil {
-		t.Errorf("should return errors for invalid association, but got nil")
+		t.Fatalf("should return errors for invalid association, but got nil")
 	}
 }

tests/delete_test.go

@@ -31,12 +31,14 @@ func TestDelete(t *testing.T) {
 	}
 
 	for _, user := range []User{users[0], users[2]} {
+		result = User{}
 		if err := DB.Where("id = ?", user.ID).First(&result).Error; err != nil {
 			t.Errorf("no error should returns when query %v, but got %v", user.ID, err)
 		}
 	}
 
 	for _, user := range []User{users[0], users[2]} {
+		result = User{}
 		if err := DB.Where("id = ?", user.ID).First(&result).Error; err != nil {
 			t.Errorf("no error should returns when query %v, but got %v", user.ID, err)
 		}

tests/query_test.go

@@ -264,10 +264,12 @@ func TestSearchWithEmptyChain(t *testing.T) {
 		t.Errorf("Should not raise any error if searching with empty strings")
 	}
 
+	result = User{}
 	if DB.Where(&User{}).Where("name = ?", user.Name).First(&result).Error != nil {
 		t.Errorf("Should not raise any error if searching with empty struct")
 	}
 
+	result = User{}
 	if DB.Where(map[string]interface{}{}).Where("name = ?", user.Name).First(&result).Error != nil {
 		t.Errorf("Should not raise any error if searching with empty map")
 	}
@@ -319,6 +321,7 @@ func TestSearchWithMap(t *testing.T) {
 	DB.First(&user, map[string]interface{}{"name": users[0].Name})
 	CheckUser(t, user, users[0])
 
+	user = User{}
 	DB.Where(map[string]interface{}{"name": users[1].Name}).First(&user)
 	CheckUser(t, user, users[1])
 

tests/update_test.go

@@ -2,6 +2,8 @@ package tests_test
 
 import (
 	"errors"
+	"sort"
+	"strings"
 	"testing"
 	"time"
 
@@ -218,3 +220,304 @@ func TestBlockGlobalUpdate(t *testing.T) {
 		t.Errorf("should returns missing WHERE clause while updating error, got err %v", err)
 	}
 }
+
+func TestSelectWithUpdate(t *testing.T) {
+	user := *GetUser("select_update", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	var result User
+	DB.First(&result, user.ID)
+
+	user2 := *GetUser("select_update_new", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	result.Name = user2.Name
+	result.Age = 50
+	result.Account = user2.Account
+	result.Pets = user2.Pets
+	result.Toys = user2.Toys
+	result.Company = user2.Company
+	result.Manager = user2.Manager
+	result.Team = user2.Team
+	result.Languages = user2.Languages
+	result.Friends = user2.Friends
+
+	DB.Select("Name", "Account", "Toys", "Manager", "ManagerID", "Languages").Save(&result)
+
+	var result2 User
+	DB.Preload("Account").Preload("Pets").Preload("Toys").Preload("Company").Preload("Manager").Preload("Team").Preload("Languages").Preload("Friends").First(&result2, user.ID)
+
+	result.Languages = append(user.Languages, result.Languages...)
+	result.Toys = append(user.Toys, result.Toys...)
+
+	sort.Slice(result.Languages, func(i, j int) bool {
+		return strings.Compare(result.Languages[i].Code, result.Languages[j].Code) > 0
+	})
+
+	sort.Slice(result.Toys, func(i, j int) bool {
+		return result.Toys[i].ID < result.Toys[j].ID
+	})
+
+	sort.Slice(result2.Languages, func(i, j int) bool {
+		return strings.Compare(result2.Languages[i].Code, result2.Languages[j].Code) > 0
+	})
+
+	sort.Slice(result2.Toys, func(i, j int) bool {
+		return result2.Toys[i].ID < result2.Toys[j].ID
+	})
+
+	AssertObjEqual(t, result2, result, "Name", "Account", "Toys", "Manager", "ManagerID", "Languages")
+}
+
+func TestSelectWithUpdateWithMap(t *testing.T) {
+	user := *GetUser("select_update_map", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	var result User
+	DB.First(&result, user.ID)
+
+	user2 := *GetUser("select_update_map_new", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	updateValues := map[string]interface{}{
+		"Name":      user2.Name,
+		"Age":       50,
+		"Account":   user2.Account,
+		"Pets":      user2.Pets,
+		"Toys":      user2.Toys,
+		"Company":   user2.Company,
+		"Manager":   user2.Manager,
+		"Team":      user2.Team,
+		"Languages": user2.Languages,
+		"Friends":   user2.Friends,
+	}
+
+	DB.Model(&result).Select("Name", "Account", "Toys", "Manager", "ManagerID", "Languages").Updates(updateValues)
+
+	var result2 User
+	DB.Preload("Account").Preload("Pets").Preload("Toys").Preload("Company").Preload("Manager").Preload("Team").Preload("Languages").Preload("Friends").First(&result2, user.ID)
+
+	result.Languages = append(user.Languages, result.Languages...)
+	result.Toys = append(user.Toys, result.Toys...)
+
+	sort.Slice(result.Languages, func(i, j int) bool {
+		return strings.Compare(result.Languages[i].Code, result.Languages[j].Code) > 0
+	})
+
+	sort.Slice(result.Toys, func(i, j int) bool {
+		return result.Toys[i].ID < result.Toys[j].ID
+	})
+
+	sort.Slice(result2.Languages, func(i, j int) bool {
+		return strings.Compare(result2.Languages[i].Code, result2.Languages[j].Code) > 0
+	})
+
+	sort.Slice(result2.Toys, func(i, j int) bool {
+		return result2.Toys[i].ID < result2.Toys[j].ID
+	})
+
+	AssertObjEqual(t, result2, result, "Name", "Account", "Toys", "Manager", "ManagerID", "Languages")
+}
+
+func TestOmitWithUpdate(t *testing.T) {
+	user := *GetUser("omit_update", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	var result User
+	DB.First(&result, user.ID)
+
+	user2 := *GetUser("omit_update_new", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	result.Name = user2.Name
+	result.Age = 50
+	result.Account = user2.Account
+	result.Pets = user2.Pets
+	result.Toys = user2.Toys
+	result.Company = user2.Company
+	result.Manager = user2.Manager
+	result.Team = user2.Team
+	result.Languages = user2.Languages
+	result.Friends = user2.Friends
+
+	DB.Omit("Name", "Account", "Toys", "Manager", "ManagerID", "Languages").Save(&result)
+
+	var result2 User
+	DB.Preload("Account").Preload("Pets").Preload("Toys").Preload("Company").Preload("Manager").Preload("Team").Preload("Languages").Preload("Friends").First(&result2, user.ID)
+
+	result.Pets = append(user.Pets, result.Pets...)
+	result.Team = append(user.Team, result.Team...)
+	result.Friends = append(user.Friends, result.Friends...)
+
+	sort.Slice(result.Pets, func(i, j int) bool {
+		return result.Pets[i].ID < result.Pets[j].ID
+	})
+	sort.Slice(result.Team, func(i, j int) bool {
+		return result.Team[i].ID < result.Team[j].ID
+	})
+	sort.Slice(result.Friends, func(i, j int) bool {
+		return result.Friends[i].ID < result.Friends[j].ID
+	})
+	sort.Slice(result2.Pets, func(i, j int) bool {
+		return result2.Pets[i].ID < result2.Pets[j].ID
+	})
+	sort.Slice(result2.Team, func(i, j int) bool {
+		return result2.Team[i].ID < result2.Team[j].ID
+	})
+	sort.Slice(result2.Friends, func(i, j int) bool {
+		return result2.Friends[i].ID < result2.Friends[j].ID
+	})
+
+	AssertObjEqual(t, result2, result, "Age", "Pets", "Company", "CompanyID", "Team", "Friends")
+}
+
+func TestOmitWithUpdateWithMap(t *testing.T) {
+	user := *GetUser("omit_update_map", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	var result User
+	DB.First(&result, user.ID)
+
+	user2 := *GetUser("omit_update_map_new", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	updateValues := map[string]interface{}{
+		"Name":      user2.Name,
+		"Age":       50,
+		"Account":   user2.Account,
+		"Pets":      user2.Pets,
+		"Toys":      user2.Toys,
+		"Company":   user2.Company,
+		"Manager":   user2.Manager,
+		"Team":      user2.Team,
+		"Languages": user2.Languages,
+		"Friends":   user2.Friends,
+	}
+
+	DB.Model(&result).Omit("Name", "Account", "Toys", "Manager", "ManagerID", "Languages").Updates(updateValues)
+
+	var result2 User
+	DB.Preload("Account").Preload("Pets").Preload("Toys").Preload("Company").Preload("Manager").Preload("Team").Preload("Languages").Preload("Friends").First(&result2, user.ID)
+
+	result.Pets = append(user.Pets, result.Pets...)
+	result.Team = append(user.Team, result.Team...)
+	result.Friends = append(user.Friends, result.Friends...)
+
+	sort.Slice(result.Pets, func(i, j int) bool {
+		return result.Pets[i].ID < result.Pets[j].ID
+	})
+	sort.Slice(result.Team, func(i, j int) bool {
+		return result.Team[i].ID < result.Team[j].ID
+	})
+	sort.Slice(result.Friends, func(i, j int) bool {
+		return result.Friends[i].ID < result.Friends[j].ID
+	})
+	sort.Slice(result2.Pets, func(i, j int) bool {
+		return result2.Pets[i].ID < result2.Pets[j].ID
+	})
+	sort.Slice(result2.Team, func(i, j int) bool {
+		return result2.Team[i].ID < result2.Team[j].ID
+	})
+	sort.Slice(result2.Friends, func(i, j int) bool {
+		return result2.Friends[i].ID < result2.Friends[j].ID
+	})
+
+	AssertObjEqual(t, result2, result, "Age", "Pets", "Company", "CompanyID", "Team", "Friends")
+}
+
+func TestSelectWithUpdateColumn(t *testing.T) {
+	user := *GetUser("select_with_update_column", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	updateValues := map[string]interface{}{"Name": "new_name", "Age": 50}
+
+	var result User
+	DB.First(&result, user.ID)
+	DB.Model(&result).Select("Name").UpdateColumns(updateValues)
+
+	var result2 User
+	DB.First(&result2, user.ID)
+
+	if result2.Name == user.Name || result2.Age != user.Age {
+		t.Errorf("Should only update users with name column")
+	}
+}
+
+func TestOmitWithUpdateColumn(t *testing.T) {
+	user := *GetUser("omit_with_update_column", Config{Account: true, Pets: 3, Toys: 3, Company: true, Manager: true, Team: 3, Languages: 3, Friends: 4})
+	DB.Create(&user)
+
+	updateValues := map[string]interface{}{"Name": "new_name", "Age": 50}
+
+	var result User
+	DB.First(&result, user.ID)
+	DB.Model(&result).Omit("Name").UpdateColumns(updateValues)
+
+	var result2 User
+	DB.First(&result2, user.ID)
+
+	if result2.Name != user.Name || result2.Age == user.Age {
+		t.Errorf("Should only update users with name column")
+	}
+}
+
+func TestUpdateColumnsSkipsAssociations(t *testing.T) {
+	user := *GetUser("update_column_skips_association", Config{})
+	DB.Create(&user)
+
+	// Update a single field of the user and verify that the changed address is not stored.
+	newAge := uint(100)
+	user.Account.Number = "new_account_number"
+	db := DB.Model(&user).UpdateColumns(User{Age: newAge})
+
+	if db.RowsAffected != 1 {
+		t.Errorf("Expected RowsAffected=1 but instead RowsAffected=%v", db.RowsAffected)
+	}
+
+	// Verify that Age now=`newAge`.
+	result := &User{}
+	result.ID = user.ID
+	DB.Preload("Account").First(result)
+
+	if result.Age != newAge {
+		t.Errorf("Expected freshly queried user to have Age=%v but instead found Age=%v", newAge, result.Age)
+	}
+
+	if result.Account.Number != user.Account.Number {
+		t.Errorf("account number should not been changed, expects: %v, got %v", user.Account.Number, result.Account.Number)
+	}
+}
+
+func TestUpdatesWithBlankValues(t *testing.T) {
+	user := *GetUser("updates_with_blank_value", Config{})
+	DB.Save(&user)
+
+	var user2 User
+	user2.ID = user.ID
+	DB.Model(&user2).Updates(&User{Age: 100})
+
+	var result User
+	DB.First(&result, user.ID)
+
+	if result.Name != user.Name || result.Age != 100 {
+		t.Errorf("user's name should not be updated")
+	}
+}
+
+func TestUpdatesTableWithIgnoredValues(t *testing.T) {
+	type ElementWithIgnoredField struct {
+		Id           int64
+		Value        string
+		IgnoredField int64 `gorm:"-"`
+	}
+	DB.Migrator().DropTable(&ElementWithIgnoredField{})
+	DB.AutoMigrate(&ElementWithIgnoredField{})
+
+	elem := ElementWithIgnoredField{Value: "foo", IgnoredField: 10}
+	DB.Save(&elem)
+
+	DB.Model(&ElementWithIgnoredField{}).
+		Where("id = ?", elem.Id).
+		Updates(&ElementWithIgnoredField{Value: "bar", IgnoredField: 100})
+
+	var result ElementWithIgnoredField
+	if err := DB.First(&result, elem.Id).Error; err != nil {
+		t.Errorf("error getting an element from database: %s", err.Error())
+	}
+
+	if result.IgnoredField != 0 {
+		t.Errorf("element's ignored field should not be updated")
+	}
+}

tests/utils.go

@@ -3,6 +3,7 @@ package tests
 import (
 	"database/sql/driver"
 	"fmt"
+	"go/ast"
 	"reflect"
 	"sort"
 	"strconv"
@@ -126,6 +127,37 @@ func AssertEqual(t *testing.T, got, expect interface{}) {
 			return
 		}
 
+		if reflect.ValueOf(got).Kind() == reflect.Slice {
+			if reflect.ValueOf(expect).Kind() == reflect.Slice {
+				if reflect.ValueOf(got).Len() == reflect.ValueOf(expect).Len() {
+					for i := 0; i < reflect.ValueOf(got).Len(); i++ {
+						name := fmt.Sprintf(reflect.ValueOf(got).Type().Name()+" #%v", i)
+						t.Run(name, func(t *testing.T) {
+							AssertEqual(t, reflect.ValueOf(got).Index(i).Interface(), reflect.ValueOf(expect).Index(i).Interface())
+						})
+					}
+				} else {
+					name := reflect.ValueOf(got).Type().Elem().Name()
+					t.Errorf("%v expects length: %v, got %v", name, reflect.ValueOf(expect).Len(), reflect.ValueOf(got).Len())
+				}
+				return
+			}
+		}
+
+		if reflect.ValueOf(got).Kind() == reflect.Struct {
+			if reflect.ValueOf(got).NumField() == reflect.ValueOf(expect).NumField() {
+				for i := 0; i < reflect.ValueOf(got).NumField(); i++ {
+					if fieldStruct := reflect.ValueOf(got).Type().Field(i); ast.IsExported(fieldStruct.Name) {
+						field := reflect.ValueOf(got).Field(i)
+						t.Run(fieldStruct.Name, func(t *testing.T) {
+							AssertEqual(t, field.Interface(), reflect.ValueOf(expect).Field(i).Interface())
+						})
+					}
+				}
+				return
+			}
+		}
+
 		if reflect.ValueOf(got).Type().ConvertibleTo(reflect.ValueOf(expect).Type()) {
 			got = reflect.ValueOf(got).Convert(reflect.ValueOf(expect).Type()).Interface()
 			isEqual()