diff --git a/schema/index.go b/schema/index.go
index a0a71d2c..fb7ea501 100644
--- a/schema/index.go
+++ b/schema/index.go
@@ -1,6 +1,7 @@
 package schema
 
 import (
+	"sort"
 	"strconv"
 	"strings"
 )
@@ -20,6 +21,7 @@ type IndexOption struct {
 	Sort       string // DESC, ASC
 	Collate    string
 	Length     int
+	priority   int
 }
 
 // ParseIndexes parse schema indexes
@@ -43,7 +45,12 @@ func (schema *Schema) ParseIndexes() map[string]Index {
 				if idx.Comment == "" {
 					idx.Comment = index.Comment
 				}
+
 				idx.Fields = append(idx.Fields, index.Fields...)
+				sort.Slice(idx.Fields, func(i, j int) bool {
+					return idx.Fields[i].priority < idx.Fields[j].priority
+				})
+
 				indexes[index.Name] = idx
 			}
 		}
@@ -101,6 +108,11 @@ func parseFieldIndexes(field *Field) (indexes []Index) {
 					settings["CLASS"] = "UNIQUE"
 				}
 
+				priority, err := strconv.Atoi(settings["PRIORITY"])
+				if err != nil {
+					priority = 10
+				}
+
 				indexes = append(indexes, Index{
 					Name:    name,
 					Class:   settings["CLASS"],
@@ -113,6 +125,7 @@ func parseFieldIndexes(field *Field) (indexes []Index) {
 						Sort:       settings["SORT"],
 						Collate:    settings["COLLATE"],
 						Length:     length,
+						priority:   priority,
 					}},
 				})
 			}
diff --git a/schema/index_test.go b/schema/index_test.go
index f6c3d247..dc1fb43b 100644
--- a/schema/index_test.go
+++ b/schema/index_test.go
@@ -17,7 +17,7 @@ type UserIndex struct {
 	Name6        int64  `gorm:"index:profile,comment:hello \\, world,where:age > 10"`
 	Age          int64  `gorm:"index:profile,expression:ABS(age)"`
 	OID          int64  `gorm:"index:idx_id;index:idx_oid,unique"`
-	MemberNumber string `gorm:"index:idx_id"`
+	MemberNumber string `gorm:"index:idx_id,priority:1"`
 }
 
 func TestParseIndex(t *testing.T) {
@@ -29,18 +29,19 @@ func TestParseIndex(t *testing.T) {
 	results := map[string]schema.Index{
 		"idx_user_indices_name": {
 			Name:   "idx_user_indices_name",
-			Fields: []schema.IndexOption{{}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name"}}},
 		},
 		"idx_name": {
 			Name:   "idx_name",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name2"}}},
 		},
 		"idx_user_indices_name3": {
 			Name:  "idx_user_indices_name3",
 			Type:  "btree",
 			Where: "name3 != 'jinzhu'",
 			Fields: []schema.IndexOption{{
+				Field:   &schema.Field{Name: "Name3"},
 				Sort:    "desc",
 				Collate: "utf8",
 				Length:  10,
@@ -49,31 +50,32 @@ func TestParseIndex(t *testing.T) {
 		"idx_user_indices_name4": {
 			Name:   "idx_user_indices_name4",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name4"}}},
 		},
 		"idx_user_indices_name5": {
 			Name:    "idx_user_indices_name5",
 			Class:   "FULLTEXT",
 			Comment: "hello , world",
 			Where:   "age > 10",
-			Fields:  []schema.IndexOption{{}},
+			Fields:  []schema.IndexOption{{Field: &schema.Field{Name: "Name5"}}},
 		},
 		"profile": {
 			Name:    "profile",
 			Comment: "hello , world",
 			Where:   "age > 10",
-			Fields: []schema.IndexOption{{}, {
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name6"}}, {
+				Field:      &schema.Field{Name: "Age"},
 				Expression: "ABS(age)",
 			}},
 		},
 		"idx_id": {
 			Name:   "idx_id",
-			Fields: []schema.IndexOption{{}, {}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "MemberNumber"}}, {Field: &schema.Field{Name: "OID"}}},
 		},
 		"idx_oid": {
 			Name:   "idx_oid",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "OID"}}},
 		},
 	}
 
@@ -96,6 +98,10 @@ func TestParseIndex(t *testing.T) {
 
 		for idx, ef := range result.Fields {
 			rf := v.Fields[idx]
+			if rf.Field.Name != ef.Field.Name {
+				t.Fatalf("index field should equal, expects %v, got %v", rf.Field.Name, ef.Field.Name)
+			}
+
 			for _, name := range []string{"Expression", "Sort", "Collate", "Length"} {
 				if reflect.ValueOf(ef).FieldByName(name).Interface() != reflect.ValueOf(rf).FieldByName(name).Interface() {
 					t.Errorf(
diff --git a/schema/relationship.go b/schema/relationship.go
index 0967f8c8..91c2ca8d 100644
--- a/schema/relationship.go
+++ b/schema/relationship.go
@@ -130,7 +130,7 @@ func (schema *Schema) buildPolymorphicRelation(relation *Relationship, field *Fi
 		PolymorphicID:   relation.FieldSchema.FieldsByName[polymorphic+"ID"],
 	}
 
-	if value, ok := field.TagSettings["POLYMORPHIC_VALUE"]; ok {
+	if value, ok := field.TagSettings["POLYMORPHICVALUE"]; ok {
 		relation.Polymorphic.Value = strings.TrimSpace(value)
 	}
 
diff --git a/tests/named_polymorphic_test.go b/tests/named_polymorphic_test.go
index cbe236b5..956f3a7e 100644
--- a/tests/named_polymorphic_test.go
+++ b/tests/named_polymorphic_test.go
@@ -9,8 +9,8 @@ import (
 type Hamster struct {
 	Id           int
 	Name         string
-	PreferredToy Toy `gorm:"polymorphic:Owner;polymorphic_value:hamster_preferred"`
-	OtherToy     Toy `gorm:"polymorphic:Owner;polymorphic_value:hamster_other"`
+	PreferredToy Toy `gorm:"polymorphic:Owner;polymorphicValue:hamster_preferred"`
+	OtherToy     Toy `gorm:"polymorphic:Owner;polymorphicValue:hamster_other"`
 }
 
 func TestNamedPolymorphic(t *testing.T) {
diff --git a/utils/tests/models.go b/utils/tests/models.go
index 021b0229..2c5e71c0 100644
--- a/utils/tests/models.go
+++ b/utils/tests/models.go
@@ -24,8 +24,8 @@ type User struct {
 	ManagerID *uint
 	Manager   *User
 	Team      []User     `gorm:"foreignkey:ManagerID"`
-	Languages []Language `gorm:"many2many:UserSpeak"`
-	Friends   []*User    `gorm:"many2many:user_friends"`
+	Languages []Language `gorm:"many2many:UserSpeak;"`
+	Friends   []*User    `gorm:"many2many:user_friends;"`
 	Active    bool
 }