70 lines
1.2 KiB
Go
70 lines
1.2 KiB
Go
// Package persistence handles database schema migrations
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package persistence
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import (
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"database/sql"
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"os"
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"path/filepath"
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"sort"
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)
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func ApplyMigrations(db *sql.DB, dir string) error {
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_, err := db.Exec(`CREATE TABLE IF NOT EXISTS schema_migrations (version TEXT PRIMARY KEY);`)
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if err != nil {
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return err
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}
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entries, err := os.ReadDir(dir)
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if err != nil {
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return err
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}
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sort.Slice(entries, func(i, j int) bool {
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return entries[i].Name() < entries[j].Name()
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})
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for _, e := range entries {
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if e.IsDir(){
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continue
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}
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name := e.Name()
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applied, err := isMigrationApplied(db, name)
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if err != nil {
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return err
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}
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if applied {
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continue
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}
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path := filepath.Join(dir, name)
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sqlBytes, err := os.ReadFile(path)
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if err != nil {
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return err
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}
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if _, err := db.Exec(string(sqlBytes)); err != nil {
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return err
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}
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if _, err := db.Exec(`INSERT INTO schema_migrations (version) VALUES (?)`, name); err != nil {
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return err
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}
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}
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return nil
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}
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func isMigrationApplied(db *sql.DB, version string) (bool, error) {
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var v string
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err := db.QueryRow(`SELECT version FROM schema_migrations WHERE version= ?`, version).Scan(&v)
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if err == sql.ErrNoRows {
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return false, nil
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}
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return err == nil, err
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}
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