Michael McGuinness
85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
package database
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import (
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"database/sql"
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"fmt"
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"log"
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"path"
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"queryorchestration/internal/env"
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"github.com/golang-migrate/migrate/v4"
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"github.com/golang-migrate/migrate/v4/database/postgres"
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_ "github.com/golang-migrate/migrate/v4/source/file"
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)
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func createDB() {
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dbUser := env.GetPanic("DB_USER")
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dbPass := env.GetPanic("DB_PASS")
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dbHost := env.GetPanic("DB_HOST")
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dbPort := env.GetPanic("DB_PORT")
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dbName := env.GetPanic("DB_NAME")
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driver := "postgres"
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connStr := fmt.Sprintf("%s://%s:%s@%s:%s?sslmode=disable", driver, dbUser, dbPass, dbHost, dbPort)
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db, err := sql.Open(driver, connStr)
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if err != nil {
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log.Panicf("Error opening database: %v", err)
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}
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defer db.Close()
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result, err := db.Exec(fmt.Sprintf("SELECT 'CREATE DATABASE %s' WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '%s')", dbName, dbName))
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if err != nil {
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log.Panicf("Error creating database: %v", err)
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}
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rows, err := result.RowsAffected()
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if err != nil {
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log.Panic(err)
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} else if rows == 0 {
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log.Printf("Database already exists: %s", dbName)
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} else {
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log.Printf("Database created: %s", dbName)
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}
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}
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func RunMigrations(basePath string) {
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createDB()
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connStr := createConnectionString()
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driver := "postgres"
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db, err := sql.Open(driver, connStr)
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if err != nil {
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log.Panicf("failed to open database: %v", err)
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}
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defer db.Close()
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if err = db.Ping(); err != nil {
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log.Panic("Failed to connect to database:", err)
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}
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conn, err := postgres.WithInstance(db, &postgres.Config{})
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if err != nil {
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log.Panic(err)
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}
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migPath := "file://" + path.Join(basePath, "database/migrations")
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m, err := migrate.NewWithDatabaseInstance(
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migPath,
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driver,
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conn,
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)
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if err != nil {
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log.Panicf("failed to create migrate instance: %v", err)
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}
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err = m.Up()
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if err == migrate.ErrNoChange {
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log.Println("No changes required")
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} else if err != nil {
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log.Panicf("failed to apply migrations: %v", err)
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} else {
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log.Println("Migrations applied successfully!")
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}
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}
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