From baf1afa1fcb45b69a7c64c3fb82da7a0dd32bcfc Mon Sep 17 00:00:00 2001
From: Haibo <nomango@qq.com>
Date: Wed, 11 Jan 2023 14:05:39 +0800
Subject: [PATCH] fix(schema): field is only unique when there is one unique
 index (#5974)

---
 schema/index.go      |  7 +++++--
 schema/index_test.go | 11 +++++++----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/schema/index.go b/schema/index.go
index c29623ad..f5ac5dd2 100644
--- a/schema/index.go
+++ b/schema/index.go
@@ -65,7 +65,11 @@ func (schema *Schema) ParseIndexes() map[string]Index {
 			}
 		}
 	}
-
+	for _, index := range indexes {
+		if index.Class == "UNIQUE" && len(index.Fields) == 1 {
+			index.Fields[0].Field.Unique = true
+		}
+	}
 	return indexes
 }
 
@@ -129,7 +133,6 @@ func parseFieldIndexes(field *Field) (indexes []Index, err error) {
 				}
 
 				if (k == "UNIQUEINDEX") || settings["UNIQUE"] != "" {
-					field.Unique = true
 					settings["CLASS"] = "UNIQUE"
 				}
 
diff --git a/schema/index_test.go b/schema/index_test.go
index 1fe31cc1..890327de 100644
--- a/schema/index_test.go
+++ b/schema/index_test.go
@@ -65,7 +65,7 @@ func TestParseIndex(t *testing.T) {
 		"idx_name": {
 			Name:   "idx_name",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name2"}}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name2", Unique: true}}},
 		},
 		"idx_user_indices_name3": {
 			Name:  "idx_user_indices_name3",
@@ -81,7 +81,7 @@ func TestParseIndex(t *testing.T) {
 		"idx_user_indices_name4": {
 			Name:   "idx_user_indices_name4",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name4"}}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "Name4", Unique: true}}},
 		},
 		"idx_user_indices_name5": {
 			Name:    "idx_user_indices_name5",
@@ -102,12 +102,12 @@ func TestParseIndex(t *testing.T) {
 		},
 		"idx_id": {
 			Name:   "idx_id",
-			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "MemberNumber"}}, {Field: &schema.Field{Name: "OID"}}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "MemberNumber"}}, {Field: &schema.Field{Name: "OID", Unique: true}}},
 		},
 		"idx_oid": {
 			Name:   "idx_oid",
 			Class:  "UNIQUE",
-			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "OID"}}},
+			Fields: []schema.IndexOption{{Field: &schema.Field{Name: "OID", Unique: true}}},
 		},
 		"type": {
 			Name:   "type",
@@ -168,6 +168,9 @@ func TestParseIndex(t *testing.T) {
 			if rf.Field.Name != ef.Field.Name {
 				t.Fatalf("index field should equal, expects %v, got %v", rf.Field.Name, ef.Field.Name)
 			}
+			if rf.Field.Unique != ef.Field.Unique {
+				t.Fatalf("index field '%s' should equal, expects %v, got %v", rf.Field.Name, rf.Field.Unique, ef.Field.Unique)
+			}
 
 			for _, name := range []string{"Expression", "Sort", "Collate", "Length"} {
 				if reflect.ValueOf(ef).FieldByName(name).Interface() != reflect.ValueOf(rf).FieldByName(name).Interface() {