fix: map docker host library paths

README.md

@@ -366,6 +366,14 @@ services:
       MEDIASTATION_DATABASE_DB_PATH: /data/mediastation.db
       MEDIASTATION_CACHE_CACHE_DIR: /cache
 
+      # 宿主机到容器的路径映射提示。用于用户误填宿主机路径时自动转换为容器路径：
+      #   /vol1/1000/Docker/moviepilot-v2/media/电视剧 -> /media/电视剧
+      #   /vol1/1000/qBittorrent/downloads/国产剧 -> /downloads/国产剧
+      MEDIASTATION_MEDIA_DIR: ${MEDIASTATION_MEDIA_DIR:-./media}
+      MEDIASTATION_MEDIA_CONTAINER_DIR: /media
+      MEDIASTATION_DOWNLOAD_DIR: ${MEDIASTATION_DOWNLOAD_DIR:-./downloads}
+      MEDIASTATION_DOWNLOAD_CONTAINER_DIR: /downloads
+
       # 日志级别：debug / info / warn / error。
       MEDIASTATION_LOGGING_LEVEL: ${MEDIASTATION_LOGGING_LEVEL:-info}
 
@@ -488,6 +496,8 @@ Docker Compose 左侧是宿主机真实目录，右侧是容器内目录。宿
 
 容器内只需要使用 `/media` 和 `/downloads`。如果你看到 `/vol1/1000/Docker/MediaStationGo/vol1/...`，说明 `.env` 或 compose 里把路径写成了 `./vol1/...`，需要去掉前面的点，改为 `/vol1/...`。
 
+> 如果你在添加媒体库时填写了 `/vol1/1000/Docker/moviepilot-v2/media/电视剧/国产剧` 并提示不可访问，原因是应用在容器内运行，默认只能看到 `/media/电视剧/国产剧`。新版 compose 会把宿主机路径作为映射提示传入容器，尽量自动纠正；但最推荐、最稳定的填写方式仍然是容器路径 `/media/...`。
+
 如果 compose 中这样挂载：
 
 ```yaml

README_EN.md

@@ -346,6 +346,8 @@ The left side of a Docker Compose volume is the real host directory, and the rig
 
 Inside the app, use only `/media` and `/downloads`. If you see `/vol1/1000/Docker/MediaStationGo/vol1/...`, your `.env` or compose file probably uses `./vol1/...`; remove the dot and use `/vol1/...`.
 
+> If adding `/vol1/1000/Docker/moviepilot-v2/media/电视剧/国产剧` as a library reports inaccessible, the app is running inside the container and normally sees `/media/电视剧/国产剧`. The updated compose passes host-path hints so the backend can auto-convert common mistakes, but `/media/...` remains the recommended and most stable input.
+
 If your compose mounts are:
 
 ```yaml

docker-compose.yml

@@ -91,6 +91,14 @@ services:
       MEDIASTATION_DATABASE_DB_PATH: /data/mediastation.db
       MEDIASTATION_CACHE_CACHE_DIR: /cache
 
+      # 宿主机到容器的路径映射提示。用于用户误填宿主机路径时自动转换为容器路径：
+      #   /vol1/1000/Docker/moviepilot-v2/media/电视剧 -> /media/电视剧
+      #   /vol1/1000/qBittorrent/downloads/国产剧 -> /downloads/国产剧
+      MEDIASTATION_MEDIA_DIR: ${MEDIASTATION_MEDIA_DIR:-./media}
+      MEDIASTATION_MEDIA_CONTAINER_DIR: /media
+      MEDIASTATION_DOWNLOAD_DIR: ${MEDIASTATION_DOWNLOAD_DIR:-./downloads}
+      MEDIASTATION_DOWNLOAD_CONTAINER_DIR: /downloads
+
       # 日志级别：debug / info / warn / error。
       MEDIASTATION_LOGGING_LEVEL: ${MEDIASTATION_LOGGING_LEVEL:-info}
 

internal/service/media.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"go.uber.org/zap"
 
@@ -32,12 +33,9 @@ func (s *MediaService) CreateLibrary(ctx context.Context, name, path, kind strin
 	if name == "" || path == "" {
 		return nil, errors.New("name and path required")
 	}
-	abs, err := filepath.Abs(path)
+	abs, err := resolveAccessibleLibraryPath(path)
 	if err != nil {
-		return nil, fmt.Errorf("invalid path: %w", err)
-	}
-	if info, err := os.Stat(abs); err != nil || !info.IsDir() {
-		return nil, fmt.Errorf("path is not an accessible directory: %s", abs)
+		return nil, err
 	}
 	if kind == "" {
 		kind = "movie"
@@ -49,6 +47,86 @@ func (s *MediaService) CreateLibrary(ctx context.Context, name, path, kind strin
 	return lib, nil
 }
 
+func resolveAccessibleLibraryPath(path string) (string, error) {
+	abs, err := filepath.Abs(strings.TrimSpace(path))
+	if err != nil {
+		return "", fmt.Errorf("invalid path: %w", err)
+	}
+	if isAccessibleDir(abs) {
+		return abs, nil
+	}
+	for _, candidate := range dockerVolumePathCandidates(abs) {
+		if isAccessibleDir(candidate) {
+			return filepath.Clean(candidate), nil
+		}
+	}
+	return "", fmt.Errorf("path is not an accessible directory: %s", abs)
+}
+
+func isAccessibleDir(path string) bool {
+	info, err := os.Stat(path)
+	return err == nil && info.IsDir()
+}
+
+func dockerVolumePathCandidates(path string) []string {
+	normalized := filepath.ToSlash(filepath.Clean(path))
+	var candidates []string
+	addCandidate := func(candidate string) {
+		candidate = filepath.Clean(filepath.FromSlash(candidate))
+		for _, existing := range candidates {
+			if sameLibraryPath(existing, candidate) {
+				return
+			}
+		}
+		candidates = append(candidates, candidate)
+	}
+
+	for _, mapping := range []struct {
+		env       string
+		container string
+	}{
+		{env: "MEDIASTATION_MEDIA_DIR", container: envOrDefault("MEDIASTATION_MEDIA_CONTAINER_DIR", "/media")},
+		{env: "MEDIASTATION_DOWNLOAD_DIR", container: envOrDefault("MEDIASTATION_DOWNLOAD_CONTAINER_DIR", "/downloads")},
+	} {
+		host := filepath.ToSlash(filepath.Clean(os.Getenv(mapping.env)))
+		if host == "." || host == "" || strings.HasPrefix(host, ".") {
+			continue
+		}
+		if normalized == host {
+			addCandidate(mapping.container)
+			continue
+		}
+		if strings.HasPrefix(normalized, host+"/") {
+			addCandidate(mapping.container + strings.TrimPrefix(normalized, host))
+		}
+	}
+
+	for _, marker := range []struct {
+		part      string
+		container string
+	}{
+		{part: "/media/", container: "/media/"},
+		{part: "/downloads/", container: "/downloads/"},
+	} {
+		if idx := strings.Index(normalized, marker.part); idx >= 0 {
+			addCandidate(marker.container + strings.TrimPrefix(normalized[idx+len(marker.part):], "/"))
+		}
+	}
+
+	return candidates
+}
+
+func sameLibraryPath(a, b string) bool {
+	return filepath.Clean(a) == filepath.Clean(b)
+}
+
+func envOrDefault(key, fallback string) string {
+	if value := strings.TrimSpace(os.Getenv(key)); value != "" {
+		return value
+	}
+	return fallback
+}
+
 // ListLibraries returns every library configured on the server.
 func (s *MediaService) ListLibraries(ctx context.Context) ([]model.Library, error) {
 	return s.repo.Library.List(ctx)

internal/service/media_test.go

@@ -0,0 +1,42 @@
+package service
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestResolveAccessibleLibraryPathMapsConfiguredHostMediaDir(t *testing.T) {
+	root := t.TempDir()
+	hostRoot := filepath.Join(root, "nas", "moviepilot-v2", "media")
+	containerRoot := filepath.Join(root, "container", "media")
+	containerLibrary := filepath.Join(containerRoot, "电视剧", "国产剧")
+	if err := os.MkdirAll(containerLibrary, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("MEDIASTATION_MEDIA_DIR", hostRoot)
+	t.Setenv("MEDIASTATION_MEDIA_CONTAINER_DIR", containerRoot)
+
+	got, err := resolveAccessibleLibraryPath(filepath.Join(hostRoot, "电视剧", "国产剧"))
+	if err != nil {
+		t.Fatalf("resolveAccessibleLibraryPath() error = %v", err)
+	}
+	if got != filepath.Clean(containerLibrary) {
+		t.Fatalf("resolveAccessibleLibraryPath() = %q, want %q", got, filepath.Clean(containerLibrary))
+	}
+}
+
+func TestResolveAccessibleLibraryPathKeepsAccessibleContainerPath(t *testing.T) {
+	containerLibrary := filepath.Join(t.TempDir(), "media", "电影")
+	if err := os.MkdirAll(containerLibrary, 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	got, err := resolveAccessibleLibraryPath(containerLibrary)
+	if err != nil {
+		t.Fatalf("resolveAccessibleLibraryPath() error = %v", err)
+	}
+	if got != filepath.Clean(containerLibrary) {
+		t.Fatalf("resolveAccessibleLibraryPath() = %q, want %q", got, filepath.Clean(containerLibrary))
+	}
+}

web/src/pages/AdminPage.tsx

@@ -92,10 +92,14 @@ function LibraryPanel() {
         <input
           required
           className="input-base md:col-span-2"
-          placeholder="服务器路径,如 /media/movies"
+          placeholder="容器路径，如 /media/电视剧/国产剧"
           value={path}
           onChange={(e) => setPath(e.target.value)}
         />
+        <p className="md:col-span-4 -mt-2 text-xs text-sand-500">
+          Docker 部署时请优先填写容器内路径，例如 /media/电影、/media/电视剧/国产剧；如果误填 NAS
+          宿主机路径，系统会尝试按 compose 挂载自动转换。
+        </p>
         <select className="input-base" value={type} onChange={(e) => setType(e.target.value)}>
           <option value="movie">电影</option>
           <option value="tv">电视剧</option>