add readme

Author: afumu

README.md

@@ -1,2 +1,133 @@
 # gorm-plus
 这是一个gorm的增强版，类似mybatis-plus语法
+
+下载使用：
+
+go get github.com/zouchangfu/gorm-plus
+
+使用demo：
+
+```
+
+func init() {
+	dsn := "root:root-abcd-1234@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
+	var err error
+	gormDb, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		fmt.Println(err)
+	}
+	gormplus.Init(gormDb)
+}
+
+type Test1 struct {
+	gorm.Model
+	Code  string
+	Price uint
+}
+
+func TestSave(t *testing.T) {
+	test1 := Test1{Code: "D1", Price: 100}
+	resultDb := mapper.Insert(&test1)
+	fmt.Println(resultDb)
+	fmt.Println(test1)
+}
+
+func TestSaveMigrate(t *testing.T) {
+	test1 := Test1{Code: "D2", Price: 100}
+	resultDb, err := mapper.InsertMigrate(&test1)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(resultDb)
+	fmt.Println(test1)
+}
+
+func TestBatchSave(t *testing.T) {
+	test1 := Test1{Code: "D3", Price: 100}
+	test2 := Test1{Code: "D4", Price: 100}
+	resultDb := mapper.InsertBatch(&test1, &test2)
+	fmt.Println(resultDb)
+	fmt.Println(test1)
+	fmt.Println(test2)
+}
+
+func TestSaveBatchMigrate(t *testing.T) {
+	test1 := Test1{Code: "D5", Price: 100}
+	test2 := Test1{Code: "D6", Price: 100}
+	resultDb, err := mapper.InsertBatchMigrate(&test1, &test2)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println(resultDb)
+	fmt.Println(test1)
+	fmt.Println(test2)
+}
+
+func TestDeleteById(t *testing.T) {
+	resultDb := mapper.DeleteById[Test1](1)
+	fmt.Println(resultDb)
+}
+
+func TestDeleteByIds(t *testing.T) {
+	resultDb := mapper.DeleteByIds[Test1](4, 5)
+	fmt.Println(resultDb)
+}
+
+func TestDelete(t *testing.T) {
+	q := mapper.Query[Test1]{}
+	q.Eq("code", "D1").Eq("price", 100)
+	resultDb := mapper.Delete(&q)
+	fmt.Println(resultDb)
+}
+
+func TestUpdateById(t *testing.T) {
+	test1 := Test1{Code: "777"}
+	resultDb := mapper.UpdateById(6, &test1)
+	fmt.Println(resultDb)
+}
+
+func TestUpdate(t *testing.T) {
+	q := mapper.Query[Test1]{}
+	q.Eq("code", "D42").Eq("price", 100)
+	test1 := Test1{Code: "888"}
+	resultDb := mapper.Update(&q, &test1)
+	fmt.Println(resultDb)
+}
+
+func TestSelectById(t *testing.T) {
+	db, result := mapper.SelectById[Test1](1)
+	fmt.Println(db)
+	fmt.Println(result)
+}
+
+func TestSelectByIds(t *testing.T) {
+	db, result := mapper.SelectByIds[Test1](1, 2)
+	fmt.Println(db)
+	fmt.Println(result)
+}
+
+func TestSelectOne(t *testing.T) {
+	q := mapper.Query[Test1]{}
+	q.Eq("code", "D42").Eq("price", 100)
+	db, result := mapper.SelectOne(&q)
+	fmt.Println(db)
+	fmt.Println(result)
+}
+
+func TestSelectList(t *testing.T) {
+	q := mapper.Query[Test1]{}
+	q.Eq("price", 100)
+	db, result := mapper.SelectList(&q)
+	fmt.Println(db.RowsAffected)
+	fmt.Println(result)
+}
+
+func TestSelectCount(t *testing.T) {
+	q := mapper.Query[Test1]{}
+	q.Eq("price", 100)
+	db, count := mapper.SelectCount(&q)
+	fmt.Println(db)
+	fmt.Println(count)
+}
+
+```