无法将新的播放列表保存在我的Spotify帐户中我的曲目列表为空

如何解决无法将新的播放列表保存在我的Spotify帐户中我的曲目列表为空

这是我的util模块Spotify中的函数：

savePlaylist1(name,trackUris) {
    if (!name || !trackUris.length) {
      return;
    }
    const accessToken = Spotify.getAccessToken();
    const headers = { Authorization: `Bearer ${accessToken}` };


    let userID;
    return fetch('https://api.spotify.com/v1/me',{ headers: headers }
    ).then(response => {
      return response.json();
    }).then(jsonResponse => {
      userID = jsonResponse.id;
      return fetch(`https://api.spotify.com/v1/users/${userID}/playlists`,{
        headers: headers,method: 'POST',body: JSON.stringify({ name: name })
      }).then(response => {
        return response.json();
      }).then(jsonResponse => {
        const playlistID = jsonResponse.id;
        return fetch(`https://api.spotify.com/v1/playlists/${playlistID}/tracks`,{
          method: 'POST',headers: {
            'Content-Type': 'application/json',Authorization: `Bearer ${accessToken}`,},body: JSON.stringify({ uris: trackUris })
        })
      })
    })
  } // end of savePlaylist1 method
}

这是我从以下位置调用函数的容器模块：（随后是render函数）

savePlaylist() {
    const trackUris = this.state.playlistTracks.map(track => track.uri);
    Spotify.savePlaylist1(this.state.playlistName,trackUris).then(() => {
      this.setState({
        playlistName: 'New Playlist',playlistTracks: []
      });
    })
  }


 render() {
    return (
      <div>
        <div className="App" >
          < SearchBar onSearch={this.search} />
          <div className="App-playlist">
            < SearchResults searchResults={this.state.searchResults}
              onAdd={this.addTrack} />
            < Playlist playlistName={this.state.playlistName}
              playlistTracks={this.state.playlistTracks}
              onRemove={this.removeTrack}
              onNameChange={this.updatePlaylistName}
              onSave={this.savePlaylist} />
          </div>
        </div>
      </div>);
  }

这是带有安全按钮的播放列表组件>

render() {
    return (
      <div className="Playlist">
        <input defaultValue={"New Playlist"} onChange={this.handleNameChange} />
        <TrackList
          tracks={this.props.playlistTracks}
          onRemove={this.props.onRemove}
          isRemoval={true}
        />
        <button className="Playlist-save" onClick={this.props.onSave}>
          SAVE TO SPOTIFY
        </button>
      </div>
    );
  }

正在保存一个空列表，并且出现以下错误：

{ “错误”：{ “状态”：400， “ message”：“无效的音轨uri：null” } }

解决方法

最后，这是codecademy中的干扰项目，问题是它没有加载URI（从API调用时），这是因为它没有作为列表的一部分包含在搜索功能中。>

search(term) {
    const accessToken = Spotify.getAccessToken();
    return fetch(`https://api.spotify.com/v1/search?type=track&q=${term}`,{
      headers: {
        Authorization: `Bearer ${accessToken}`,},}).then(response => {
      return response.json();
    }).then(jsonResponse => {
      if (!jsonResponse.tracks) {
        return [];
      }
      return jsonResponse.tracks.items.map(track => ({
        id: track.id,name: track.name,artist: track.artists[0].name,album: track.album.name,uri: track.uri //this was missing!!!!
      }));
    });
  },