的CoffeeScript上node_redis hgetall回調函數

Question

變量的作用域，我有以下代碼：

genUserLeagueDiscussionTable = (userLeagueId, firstEntry, displayEntries) -> 
    # Generate League Discussion 
    leagueDiscussionTable = 
    striped: yes 
    bordered: yes 
    hover:  no 
    condensed: yes 
    columns: [{head:"Name"}, {head:"Comments"}] 

    console.log "get userLeague #{userLeagueId}" 
    LeagueId = userLeagueId 

    getLeagueDiscussionEntries = (entry, callback) => 
    getDiscussionEntry = (err,cnreply) -> 
     setDiscussionTableRows = (err,replyObj,request) -> 
     leagueDiscussionTable.rows[entry.dataentrynum].data = [replyObj.nickname,cnReply.entryText] 
     console.log "Reply received for entry ",entry.entrynum 
     console.log cnreply.entryText 
     loginclient.hgetall 'uid:'+cnReply.postingUid, setDiscussionTableRows 
     callback() 
    lookupentry = entry.lookupentry 
    console.log "getting entry for ", entry, " database key ", lookupentry 
    leagueclient.hgetall lookupentry, getDiscussionEntry 
    getLeagueInfo = (err,lreplyObj) => 
    console.log "got league info", lreplyObj 
    leagueDiscussionTable.caption = lreplyObj.leagueName+" League Info" 
    console.log "caption", leagueDiscussionTable.caption 
    leagueDiscussionEntries = lreplyObj.currentDiscussionEntry 
    console.log "Caption ",leagueDiscussionTable.caption," entries ", leagueDiscussionEntries, " Display Entries ",displayEntries 
    lastEntry = Math.min(leagueDiscussionEntries,firstEntry+displayEntries) 
    console.log "start entry ", firstEntry, " last entry ", lastEntry 
    entries=[] 
    for num in [firstEntry..lastEntry] 
     console.log num,".a" 
     entries[num]={} 
     entries[num].entrynum=num 
     console.log num,".b" 
     entries[num].lookupentry="userLeagueId:#{LeagueID}:discussionEntryId:#{entry}" 
     console.log num,".c" 
     entries[num].dataentrynum = num-firstEntry 
     console.log num," ", entries[num] 
    console.log "Lookup the entries ", entries 
    async.forEach entries, getLeagueDiscussionEntries 
    , (err,reply) -> 
     console.log "callback 1" 
    leagueclient.hgetall "userLeagueId:#{LeagueId}", getLeagueInfo 
    return leagueDiscussionTable 

不管我做什麼，我無法訪問LeagueId或userLeagueId在getLeagueInfo。它可以在外部包裝器中正常工作，但我無法在回調函數中訪問它。

我在做什麼錯？

感謝您的幫助。

[編輯]有沒有辦法讓我通過hgetall調用回調函數作爲參數傳遞給函數？

弗雷德

Answer 1

你的代碼有許多依賴所以很難孤立地理解，但我建議改變LeagueId實例變量：

`@leagueId = userLeagueId` 

，然後引用@leagueId而不是內部getLeagueInfo。