Question

我正在使用CouchDB（couchappy.com）的远程数据更新我的PouchDB。每次我从空的PouchDB中执行此操作时，都会出现以下错误：


    ReferenceError {result: Object, stack: (...), message: "writeCheckpoint completed with error"}
    message: "writeCheckpoint completed with error"
    result: Object
    doc_write_failures: 0
    docs_read: 1
    docs_written: 1
    end_time: Fri May 09 2014 02:21:33 GMT+0300 (EEST)
    errors: Array[0]
    last_seq: 36
    ok: false
    start_time: Fri May 09 2014 02:21:32 GMT+0300 (EEST)
    status: "aborted"
    __proto__: Object
    stack: (...)
    get stack: function () { [native code] }
    set stack: function () { [native code] }
    __proto__: Error

以下是我的代码：


    db.replicate.from('https://(server).couchappy.com/database',{
        live : false,
        doc_ids : flk_content.get('selectedLanguage')
    })
    .on('change',function(){
        console.log(err||response);
    })
    .on('complete',function(){
        db.compact();
    })
    .on('error',function(e){console.log(e);});});

我从.on（'error'）回调中收到错误消息。

一旦我收到错误，如果我再次重新加载并再次同步数据，则没有错误。

错误是什么意思？怎么预防呢？它有进一步的后果吗？谢谢大家！

编辑：

我从PouchDB调用得到的更多细节：


    "ReferenceError: err is not defined
        at Replication. (http://mydomain/myscript:851:508)
        at Replication.EventEmitter.emit (http://mydomain/pouchdb-2.2.0.js:6607:17)
        at http://mydomain/pouchdb-2.2.0.js:5293:19"

第851行：myscript中的508转到我之前提到的复制调用。我简要地检查了pouchDB js，似乎err是一个用于在

中抛出错误的内部变量


      function finishBatch() {
        writingCheckpoint = true;
        return checkpointer.writeCheckpoint(
          currentBatch.seq
        ).then(function (res) {
          writingCheckpoint = false;
          if (returnValue.cancelled) {
            completeReplication();
            throw new Error('cancelled');
          }
          result.last_seq = last_seq = currentBatch.seq;
          result.docs_written += currentBatch.docs.length;
          returnValue.emit('change', utils.clone(result));
          currentBatch = undefined;
          getChanges();
        })["catch"](function (err) {
          writingCheckpoint = false;
          abortReplication('writeCheckpoint completed with error', err);
          throw err;
        });
      }

所以似乎虽然抛出了错误，但是没有设置错误变量？

Answer 1

你永远不会在这里定义错误（或响应）

.on('change',function(){
    console.log(err||response);
})              ^

复制db时pouchDB出错

1 个答案: