🎨 Improve file structure

Author: DGuang21

demo/go.mod

@@ -3,3 +3,5 @@ module demo
 go 1.17
 
 require github.com/DGuang21/goMigration v0.0.0-20220219155357-b3bbc085e41e
+
+replace github.com/DGuang21/goMigration v0.0.0-20220219155357-b3bbc085e41e => ../

demo/go.sum

@@ -1,2 +0,0 @@
-github.com/DGuang21/goMigration v0.0.0-20220219155357-b3bbc085e41e h1:NGu5QZEdOB1/OB7mfoU5y6bi++S4dJuJyRu9lCK0Nh8=
-github.com/DGuang21/goMigration v0.0.0-20220219155357-b3bbc085e41e/go.mod h1:h4VLo8vlX+jFXC7nEfANtEdsUeIYCbWFHZR/SlT+J4k=

migration/go.mod go.modmigration/go.mod renamed to go.mod

@@ -1,21 +1,27 @@
 package migration
 
+type migration struct{}
+
+var (
+	Migration = migration{}
+)
+
 /**
  * @Description:
  * @param tableName
  * @param version
  * @param fields
  * @auth: daguang
  */
-func Create(tableName string, fields ...func(table *MigrationTable)) {
+func (m *migration) Create(tableName string, fields ...func(table *MigrationTable)) {
 	if tableName == "" {
 		panic("table can't be null")
 	}
 	if len(fields) > 0 {
 		for _, fieldFunc := range fields {
 			a := MigrationTable{
 				table: &MigrationAttributes{
-					tableName:     tableName,
+					tableName: tableName,
 				},
 			}
 			fieldFunc(&a)
@@ -29,11 +35,11 @@ func Create(tableName string, fields ...func(table *MigrationTable)) {
  * @param tableName
  * @auth: daguang
  */
-func DropIfExists(tableName string) {
+func (m *migration) DropIfExists(tableName string) {
 
 }
 
-func Drop(tableName string) {
+func (m *migration) Drop(tableName string) {
 
 }
 
@@ -44,7 +50,7 @@ func Drop(tableName string) {
  * @param fields
  * @auth: daguang
  */
-func UpdateTable(tableName string, fields ...func(table *MigrationTable)) {
+func (m *migration) UpdateTable(tableName string, fields ...func(table *MigrationTable)) {
 	if tableName == "" {
 		panic("table can't be null")
 	}
@@ -56,6 +62,6 @@ func UpdateTable(tableName string, fields ...func(table *MigrationTable)) {
 	}
 }
 
-func ReName(tableName string, newName string) {
+func (m *migration) ReName(tableName string, newName string) {
 
 }

migration/migration.go migration.gomigration/migration.go renamed to migration.go

@@ -63,7 +63,7 @@ func (m *MigrationAttributes) Change() {
 
 // Index 添加一个单独的 index
 func (m *MigrationAttributes) Index(indexName string) *MigrationAttributes {
-	m.indexFields = append(m.indexFields,[]string{m.result[len(m.result)-1].field})
-	m.indexName = append(m.indexName,indexName)
+	m.indexFields = append(m.indexFields, []string{m.result[len(m.result)-1].field})
+	m.indexName = append(m.indexName, indexName)
 	return m
-}
+}