diff --git a/callbacks/associations.go b/callbacks/associations.go
new file mode 100644
index 00000000..1df0103a
--- /dev/null
+++ b/callbacks/associations.go
@@ -0,0 +1,72 @@
+package callbacks
+
+import (
+	"reflect"
+
+	"github.com/jinzhu/gorm"
+	"github.com/jinzhu/gorm/schema"
+	"github.com/jinzhu/gorm/utils"
+)
+
+func SaveBeforeAssociations(db *gorm.DB) {
+	if db.Statement.Schema != nil {
+		for _, rel := range db.Statement.Schema.Relationships.BelongsTo {
+			creatable, updatable, saveRef := saveAssociationCheck(db, rel.Field)
+
+			switch db.Statement.ReflectValue.Kind() {
+			case reflect.Slice:
+			case reflect.Struct:
+				if _, zero := rel.Field.ValueOf(db.Statement.ReflectValue); !zero {
+					f := rel.Field.ReflectValueOf(db.Statement.ReflectValue)
+
+					_, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(f)
+
+					if isZero && creatable {
+						if f.Kind() == reflect.Ptr {
+							db.Session(&gorm.Session{}).Create(f.Interface())
+						} else {
+							db.Session(&gorm.Session{}).Create(f.Addr().Interface())
+						}
+					} else if !isZero && updatable {
+						if f.Kind() == reflect.Ptr {
+							db.Session(&gorm.Session{}).Save(f.Interface())
+						} else {
+							db.Session(&gorm.Session{}).Save(f.Addr().Interface())
+						}
+					} else {
+						continue
+					}
+
+					if saveRef {
+						for _, ref := range rel.References {
+							if !ref.OwnPrimaryKey {
+								fv, _ := ref.PrimaryKey.ValueOf(f)
+								ref.ForeignKey.Set(db.Statement.ReflectValue, fv)
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+func saveAssociationCheck(db *gorm.DB, field *schema.Field) (bool, bool, bool) {
+	creatable := field.Creatable
+	updatable := field.Updatable
+	saveRef := true
+
+	if value, ok := db.Get("gorm:association_autocreate"); creatable && ok {
+		creatable = utils.CheckTruth(value)
+	}
+
+	if value, ok := db.Get("gorm:association_autoupdate"); updatable && ok {
+		updatable = utils.CheckTruth(value)
+	}
+
+	if value, ok := db.Get("gorm:association_save_reference"); ok {
+		saveRef = utils.CheckTruth(value)
+	}
+
+	return creatable, updatable, saveRef
+}
diff --git a/callbacks/create.go b/callbacks/create.go
index e21e04c2..829c9c4c 100644
--- a/callbacks/create.go
+++ b/callbacks/create.go
@@ -41,32 +41,6 @@ func BeforeCreate(db *gorm.DB) {
 	}
 }
 
-func SaveBeforeAssociations(db *gorm.DB) {
-	if db.Statement.Schema != nil {
-		for _, rel := range db.Statement.Schema.Relationships.BelongsTo {
-			switch db.Statement.ReflectValue.Kind() {
-			case reflect.Slice:
-			case reflect.Struct:
-				if _, zero := rel.Field.ValueOf(db.Statement.ReflectValue); !zero {
-					f := rel.Field.ReflectValueOf(db.Statement.ReflectValue)
-					if f.Kind() == reflect.Ptr {
-						db.Session(&gorm.Session{}).Create(f.Interface())
-					} else {
-						db.Session(&gorm.Session{}).Create(f.Addr().Interface())
-					}
-
-					for _, ref := range rel.References {
-						if !ref.OwnPrimaryKey {
-							fv, _ := ref.PrimaryKey.ValueOf(f)
-							ref.ForeignKey.Set(db.Statement.ReflectValue, fv)
-						}
-					}
-				}
-			}
-		}
-	}
-}
-
 func Create(config *Config) func(db *gorm.DB) {
 	if config.WithReturning {
 		return CreateWithReturning
diff --git a/finisher_api.go b/finisher_api.go
index 62c1af30..9e29e327 100644
--- a/finisher_api.go
+++ b/finisher_api.go
@@ -21,7 +21,7 @@ func (db *DB) Save(value interface{}) (tx *DB) {
 	tx = db.getInstance()
 	tx.Statement.Dest = value
 
-	if err := tx.Statement.Parse(value); err != nil && tx.Statement.Schema != nil {
+	if err := tx.Statement.Parse(value); err == nil && tx.Statement.Schema != nil {
 		where := clause.Where{Exprs: make([]clause.Expression, len(tx.Statement.Schema.PrimaryFields))}
 		reflectValue := reflect.ValueOf(value)
 		for idx, pf := range tx.Statement.Schema.PrimaryFields {
@@ -35,9 +35,6 @@ func (db *DB) Save(value interface{}) (tx *DB) {
 		tx.Statement.AddClause(where)
 	}
 
-	if len(tx.Statement.Selects) == 0 {
-		tx.Statement.Selects = []string{"*"}
-	}
 	tx.callbacks.Update().Execute(tx)
 	return
 }
diff --git a/schema/field.go b/schema/field.go
index ec419383..7b37733b 100644
--- a/schema/field.go
+++ b/schema/field.go
@@ -10,6 +10,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/jinzhu/gorm/utils"
 	"github.com/jinzhu/now"
 )
 
@@ -146,13 +147,13 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 		field.DBName = dbName
 	}
 
-	if val, ok := field.TagSettings["PRIMARYKEY"]; ok && checkTruth(val) {
+	if val, ok := field.TagSettings["PRIMARYKEY"]; ok && utils.CheckTruth(val) {
 		field.PrimaryKey = true
-	} else if val, ok := field.TagSettings["PRIMARY_KEY"]; ok && checkTruth(val) {
+	} else if val, ok := field.TagSettings["PRIMARY_KEY"]; ok && utils.CheckTruth(val) {
 		field.PrimaryKey = true
 	}
 
-	if val, ok := field.TagSettings["AUTOINCREMENT"]; ok && checkTruth(val) {
+	if val, ok := field.TagSettings["AUTOINCREMENT"]; ok && utils.CheckTruth(val) {
 		field.AutoIncrement = true
 		field.HasDefaultValue = true
 	}
@@ -173,11 +174,11 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
 		field.Precision, _ = strconv.Atoi(p)
 	}
 
-	if val, ok := field.TagSettings["NOT NULL"]; ok && checkTruth(val) {
+	if val, ok := field.TagSettings["NOT NULL"]; ok && utils.CheckTruth(val) {
 		field.NotNull = true
 	}
 
-	if val, ok := field.TagSettings["UNIQUE"]; ok && checkTruth(val) {
+	if val, ok := field.TagSettings["UNIQUE"]; ok && utils.CheckTruth(val) {
 		field.Unique = true
 	}
 
diff --git a/schema/utils.go b/schema/utils.go
index d7572d3d..7be78bc5 100644
--- a/schema/utils.go
+++ b/schema/utils.go
@@ -37,13 +37,6 @@ func ParseTagSetting(str string, sep string) map[string]string {
 	return settings
 }
 
-func checkTruth(val string) bool {
-	if strings.ToLower(val) == "false" {
-		return false
-	}
-	return true
-}
-
 func toColumns(val string) (results []string) {
 	if val != "" {
 		for _, v := range strings.Split(val, ",") {
diff --git a/utils/utils.go b/utils/utils.go
index 8521d09b..8dd500a5 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -2,8 +2,10 @@ package utils
 
 import (
 	"fmt"
+	"reflect"
 	"regexp"
 	"runtime"
+	"strings"
 	"unicode"
 )
 
@@ -23,3 +25,16 @@ func FileWithLineNum() string {
 func IsChar(c rune) bool {
 	return !unicode.IsLetter(c) && !unicode.IsNumber(c)
 }
+
+func CheckTruth(val interface{}) bool {
+	if v, ok := val.(bool); ok {
+		return v
+	}
+
+	if v, ok := val.(string); ok {
+		v = strings.ToLower(v)
+		return v != "false"
+	}
+
+	return !reflect.ValueOf(val).IsZero()
+}