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‎README.md

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English | [中文](README_zh.md)
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SQLize is a powerful SQL toolkit for Golang, offering parsing, building, and migration capabilities.
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## Features
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- SQL parsing and building for multiple databases:
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- MySQL
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- PostgreSQL
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- SQLite
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- SQL migration generation:
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- Create migrations from Golang models and current SQL schema
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- Generate migration versions compatible with `golang-migrate/migrate`
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- Export ERD (MermaidJs)
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- Export Arvo Schema
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- Advanced functionalities:
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- Support for embedded structs
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- Avro schema generation (MySQL only)
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- Compatibility with `gorm` tags (default tag is `sql`)
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SQLize is a powerful migration generation tool that detects differences between two SQL state sources. It simplifies migration creation by comparing an existing SQL schema with Go models, ensuring seamless database updates.
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Designed for flexibility, SQLize supports `MySQL`, `PostgreSQL`, and `SQLite` and integrates well with popular Go ORM and migration tools like `gorm` (gorm tag), `golang-migrate/migrate` (migration version), and more.
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Additionally, SQLize offers advanced features, including `Avro Schema` export (MySQL only) and `ERD` diagram generation (`MermaidJS`).
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## Conventions
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BIGINT => bigint(20)
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```
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### Important Notes
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- Pointer values must be declared in the struct
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### Examples
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1. Using pointer values:
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- Pointer values must be declared in the struct or predefined data types.
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```golang
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type sample struct {
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ID int32 `sql:"primary_key"`
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// your struct
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type Record struct {
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ID int
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DeletedAt *time.Time
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}
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// =>
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// the struct is declared with a value
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now := time.Now()
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newMigration.FromObjects(sample{DeletedAt: &now})
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```
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2. Embedded struct:
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```golang
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type Base struct {
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ID int32 `sql:"primary_key"`
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CreatedAt time.Time
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}
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type sample struct {
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Base `sql:"embedded"`
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User string
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}
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newMigration.FromObjects(sample{})
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/*
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CREATE TABLE sample (
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id int(11) PRIMARY KEY,
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user text,
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created_at datetime
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);
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*/
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```
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3. Comparing SQL schema with Go struct:
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```go
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package main
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import (
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"time"
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"github.com/sunary/sqlize"
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)
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Record{DeletedAt: &now}
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type user struct {
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ID int32 `sql:"primary_key;auto_increment"`
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Alias string `sql:"type:VARCHAR(64)"`
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Name string `sql:"type:VARCHAR(64);unique;index_columns:name,age"`
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Age int
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Bio string
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IgnoreMe string `sql:"-"`
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AcceptTncAt *time.Time `sql:"index:idx_accept_tnc_at"`
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CreatedAt time.Time `sql:"default:CURRENT_TIMESTAMP"`
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UpdatedAt time.Time `sql:"default:CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;index:idx_updated_at"`
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// or predefined data type
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type Record struct {
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ID int
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DeletedAt *time.Time `sql:"type:DATETIME"`
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}
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func (user) TableName() string {
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return "user"
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}
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var createStm = `
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CREATE TABLE user (
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id INT AUTO_INCREMENT PRIMARY KEY,
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name VARCHAR(64),
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age INT,
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bio TEXT,
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gender BOOL,
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accept_tnc_at DATETIME NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
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);
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CREATE UNIQUE INDEX idx_name_age ON user(name, age);
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CREATE INDEX idx_updated_at ON user(updated_at);`
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func main() {
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n := time.Now()
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newMigration := sqlize.NewSqlize(sqlize.WithSqlTag("sql"), sqlize.WithMigrationFolder(""))
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_ = newMigration.FromObjects(user{AcceptTncAt: &n})
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println(newMigration.StringUp())
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//CREATE TABLE `user` (
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// `id` int(11) AUTO_INCREMENT PRIMARY KEY,
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// `alias` varchar(64),
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// `name` varchar(64),
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// `age` int(11),
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// `bio` text,
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// `accept_tnc_at` datetime NULL,
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// `created_at` datetime DEFAULT CURRENT_TIMESTAMP(),
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// `updated_at` datetime DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP()
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//);
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//CREATE UNIQUE INDEX `idx_name_age` ON `user`(`name`, `age`);
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//CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
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//CREATE INDEX `idx_updated_at` ON `user`(`updated_at`);
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println(newMigration.StringDown())
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//DROP TABLE IF EXISTS `user`;
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oldMigration := sqlize.NewSqlize(sqlize.WithMigrationFolder(""))
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//_ = oldMigration.FromMigrationFolder()
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_ = oldMigration.FromString(createStm)
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newMigration.Diff(*oldMigration)
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println(newMigration.StringUp())
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//ALTER TABLE `user` ADD COLUMN `alias` varchar(64) AFTER `id`;
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//ALTER TABLE `user` DROP COLUMN `gender`;
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//CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
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println(newMigration.StringDown())
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//ALTER TABLE `user` DROP COLUMN `alias`;
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//ALTER TABLE `user` ADD COLUMN `gender` tinyint(1) AFTER `age`;
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//DROP INDEX `idx_accept_tnc_at` ON `user`;
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println(newMigration.MermaidJsLive())
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println(newMigration.ArvoSchema())
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//...
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_ = newMigration.WriteFiles("demo migration")
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// or using struct supported by "database/sql"
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type Record struct {
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ID int
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DeletedAt sql.NullTime
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}
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```
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4. Comparing Two SQL Schemas:
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## Usage
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```go
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- Add the following code to your project as a command.
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- Implement `YourModels()` to return the Go models affected by the migration.
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- Run the command whenever you need to generate a migration.
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```golang
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package main
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import (
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"fmt"
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"log"
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"os"
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"github.com/sunary/sqlize"
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)
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func main() {
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sql1 := sqlize.NewSqlize()
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sql1.FromString(`
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CREATE TABLE user (
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id INT AUTO_INCREMENT PRIMARY KEY,
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name VARCHAR(64),
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age INT,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
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);
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CREATE UNIQUE INDEX idx_name_age ON user(name, age);
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`)
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sql2 := sqlize.NewSqlize()
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sql2.FromString(`
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CREATE TABLE user (
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id INT,
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name VARCHAR(64),
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age INT,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME
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);`)
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sql1.Diff(*sql2)
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println(sql1.StringUp())
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//ALTER TABLE `user` MODIFY COLUMN `id` int(11) AUTO_INCREMENT PRIMARY KEY;
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//ALTER TABLE `user` MODIFY COLUMN `updated_at` datetime DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP();
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//CREATE UNIQUE INDEX `idx_name_age` ON `user`(`name`, `age`);
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println(sql1.StringDown())
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//ALTER TABLE `user` MODIFY COLUMN `id` int(11);
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//ALTER TABLE `user` MODIFY COLUMN `updated_at` datetime;
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//DROP INDEX `idx_name_age` ON `user`;
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migrationFolder := "migrations/"
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sqlLatest := sqlize.NewSqlize(sqlize.WithSqlTag("sql"),
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sqlize.WithMigrationFolder(migrationFolder),
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sqlize.WithCommentGenerate())
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ms := YourModels() // TODO: implement YourModels() function
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err := sqlLatest.FromObjects(ms...)
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if err != nil {
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log.Fatal("sqlize FromObjects", err)
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}
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sqlVersion := sqlLatest.HashValue()
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sqlMigrated := sqlize.NewSqlize(sqlize.WithMigrationFolder(migrationFolder))
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err = sqlMigrated.FromMigrationFolder()
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if err != nil {
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log.Fatal("sqlize FromMigrationFolder", err)
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}
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sqlLatest.Diff(*sqlMigrated)
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fmt.Println("sql version", sqlVersion)
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fmt.Println("\n\n### migration up")
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migrationUp := sqlLatest.StringUp()
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fmt.Println(migrationUp)
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fmt.Println("\n\n### migration down")
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fmt.Println(sqlLatest.StringDown())
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initVersion := false
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if initVersion {
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log.Println("write to init version")
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err = sqlLatest.WriteFilesVersion("new version", 0, false)
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if err != nil {
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log.Fatal("sqlize WriteFilesVersion", err)
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}
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}
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if len(os.Args) > 1 {
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log.Println("write to file", os.Args[1])
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err = sqlLatest.WriteFilesWithVersion(os.Args[1], sqlVersion, false)
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if err != nil {
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log.Fatal("sqlize WriteFilesWithVersion", err)
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}
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}
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}
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```

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