81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package store
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import (
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"context"
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"fmt"
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"io/fs"
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"sort"
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"strings"
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"github.com/jackc/pgx/v5/pgxpool"
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"github.com/hhs/camtalk/internal/logger"
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)
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// RunMigrations 从给定的 fs.FS 中读取 *.up.sql 文件并按版本号顺序执行。
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// 已执行过的版本会跳过（通过 schema_migrations 表记录）。
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func RunMigrations(ctx context.Context, pool *pgxpool.Pool, fsys fs.FS) error {
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// 确保 schema_migrations 表存在
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if _, err := pool.Exec(ctx, `CREATE TABLE IF NOT EXISTS schema_migrations (
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version INTEGER PRIMARY KEY,
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applied_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
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)`); err != nil {
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return fmt.Errorf("create schema_migrations table: %w", err)
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}
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// 收集所有 *.up.sql 文件
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entries, err := fs.ReadDir(fsys, ".")
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if err != nil {
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return fmt.Errorf("read migrations dir: %w", err)
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}
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var files []string
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for _, e := range entries {
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if !e.IsDir() && strings.HasSuffix(e.Name(), ".up.sql") {
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files = append(files, e.Name())
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}
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}
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sort.Strings(files)
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for _, name := range files {
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// 从文件名提取版本号，如 "001_users.up.sql" → 1
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var version int
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if _, err := fmt.Sscanf(name, "%d_", &version); err != nil {
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return fmt.Errorf("parse version from %s: %w", name, err)
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}
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// 检查是否已执行
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var exists bool
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if err := pool.QueryRow(ctx,
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`SELECT EXISTS(SELECT 1 FROM schema_migrations WHERE version = $1)`, version,
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).Scan(&exists); err != nil {
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return fmt.Errorf("check migration version %d: %w", version, err)
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}
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if exists {
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logger.Log.Debugw("migration already applied", "version", version, "file", name)
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continue
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}
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// 读取并执行
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content, err := fs.ReadFile(fsys, name)
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if err != nil {
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return fmt.Errorf("read migration %s: %w", name, err)
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}
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if _, err := pool.Exec(ctx, string(content)); err != nil {
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return fmt.Errorf("execute migration %s: %w", name, err)
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}
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// 记录已执行
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if _, err := pool.Exec(ctx,
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`INSERT INTO schema_migrations (version) VALUES ($1)`, version,
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); err != nil {
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return fmt.Errorf("record migration %d: %w", version, err)
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}
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logger.Log.Infow("migration applied", "version", version, "file", name)
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}
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return nil
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}
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