Узел JS не может прочитать свойство 'length' of undefined

Question

Я пытаюсь запустить .js-файл, который позволит мне импортировать файл JSON в Parse.com с помощью REST API. Проблема в том, что когда я запускаю его, я получаю эту ошибку:

TypeError: Cannot read property 'length' of undefined 
    at importFromJson 

Здесь находится .js в полном объеме. Может кто-нибудь, пожалуйста, помогите мне? Я довольно новичок в API .js и REST, и это необходимо сделать из-за того, что Parse испортил и удалил функцию импорта.

var PARSE_APPLICATION_ID = 'APPID'; 
var PARSE_REST_API_KEY = 'RESTKEY'; 

var JSON_FILE_PATH = '/Users/candacebrassfield/Documents/JacksonParse/cloud/JacksonDirectory.json'; // Path to JSON file to import 
var IMPORTED_CLASS_NAME = 'JacksonDirectory2'; // Class to import 
var POINTING_CLASS_NAME = 'JacksonDirectory'; // Class with pointers to imported class 
var POINTING_CLASS_PROPERTY = 'String'; // Name of pointer property 

var request = require('request'); 
var fs = require('fs'); 

// Import objects from JSON to Parse 
importFromJson(JSON_FILE_PATH, IMPORTED_CLASS_NAME, function(newObjectIds) { 
    console.log('Successfully imported objects from JSON.'); 
    // Update objects from external Parse class pointing to imported objects 
    updatePointingObjects(IMPORTED_CLASS_NAME, POINTING_CLASS_NAME, POINTING_CLASS_PROPERTY, newObjectIds, function() { 
     console.log('Successfully updated pointing objects.'); 
    }); 
}); 


function importFromJson(jsonFilePath, importedClassName, callback) { 
    // Store new objectIds associated to their original objectIds 
    // Will be used to update pointers of other Parse classes 
    var newObjectIds = {}; 

    // Read and parse JSON file 
    var json = JSON.parse(fs.readFileSync(jsonFilePath, 'utf8')); 

    // Delay requests with setTimeout to stay under Parse's limit 
    delayedAsyncLoop(function(i, fnCallback) { 
      // Loop 
      var obj = json.results[i - 1]; 
      var originalObjectId = obj.objectId; 
      // Create object using Parse REST API 
      createObject(importedClassName, obj, function(newObj) { 
       // Abort if request fails 
       if (!newObj) process.exit(-1); 
       // Associate the object's new objectId to its original objectId 
       newObjectIds[originalObjectId] = newObj.objectId; 
       fnCallback(); 
      }); 
     }, 
     json.results.length, // Iterations 

     100, // Delay in milliseconds 
     function() { // Done looping 
      callback(newObjectIds); 
     }); 
} 

function updatePointingObjects(importedClassName, pointingClassName, pointingClassProperty, newObjectIds, callback) { 
    // Get all objects from another Parse class that point to our imported class 
    getAllPointingObjects(pointingClassName, pointingClassProperty, function(pointingObjects) { 
     // Abort if request fails 
     if (!pointingObjects) process.exit(-1); 

     var nbObjectsToUpdate = pointingObjects.length; 
     // Delay requests with setTimeout to stay under Parse's limit 
     delayedAsyncLoop(function(i, fnCallback) { 
       // Loop 
       var pointingObject = pointingObjects[i - 1]; 
       var pointer = pointingObject[pointingClassProperty]; 
       if (!pointer || pointer.className != importedClassName) { 
        fnCallback(); 
        nbObjectsToUpdate--; 
        if (!nbObjectsToUpdate) callback(); // Done updating pointing objects 
        return; 
       } 
       // Retrieve the new objectId each pointer should be updated with 
       var originalObjectId = pointer.objectId; 
       var newObjectId = newObjectIds[originalObjectId]; 
       if (!newObjectId) { 
        fnCallback(); 
        nbObjectsToUpdate--; 
        if (!nbObjectsToUpdate) callback(); // Done updating pointing objects 
        return; 
       } 
       // Update pointer to the new objectId 
       updatePointingObject(pointingClassName, pointingClassProperty, pointingObject.objectId, importedClassName, newObjectId, function() { 
        fnCallback(); 
        nbObjectsToUpdate--; 
        if (!nbObjectsToUpdate) callback(); // Done updating pointing objects 
       }); 
      }, 
      pointingObjects.length, // Iterations 
      100 // Delay in milliseconds 
     ); 
    }); 
} 


function delayedAsyncLoop (fn, iterations, delay, callback) { 
    (function loop (i, done) { 
     setTimeout(function() { 
      fn(i, function() { 
       if (--i) { 
        // Keep looping 
        loop(i, done); 
       } else { 
        // Loop done 
        if (done) done(); 
       } 
      }); 
     }, delay) 
    })(iterations, callback); 
} 

function createObject(className, object, callback) { 
    delete object.objectId; 
    delete object.createdAt; 
    delete object.updatedAt; 

    request({ 
     method: 'POST', 
     url: 'https://api.parse.com/1/classes/' + className, 
     headers: { 
      'X-Parse-Application-Id': PARSE_APPLICATION_ID, 
      'X-Parse-REST-API-Key': PARSE_REST_API_KEY, 
      'Content-Type': 'application/json; charset=UTF-8' 
     }, 
     body: JSON.stringify(object) 
    }, function(error, response, body) { 
     if (response.statusCode == 201) { 
      var result = JSON.parse(body); 

      object.objectId = result.objectId; 
      object.createdAt = result.createdAt; 
      object.updatedAt = result.updatedAt; 

      console.log('Created ' + className + ' object with objectId ' + result.objectId); 
      callback(object); 
     } else { 
      console.log('Error: ' + response.statusCode); 
      console.log(body); 
      callback(); 
     } 
    }); 
} 

function getAllPointingObjects(className, pointingProperty, callback) { 
    getPointingObjectsRecursive([], className, pointingProperty, 0, null, callback) 
} 

function getPointingObjectsRecursive(allObjects, className, pointingProperty, skipNb, minCreatedAt, callback) { 
    var whereObj = {}; 
    whereObj[pointingProperty] = { 
     '$exists': true 
    }; 
    if (minCreatedAt) { 
     whereObj['createdAt'] = { 
      '$gt': minCreatedAt 
     }; 
    } 
    var queryString = { 
     'limit': 1000, 
     'order': 'createdAt', 
     'skip': skipNb, 
     'where': JSON.stringify(whereObj) 
    }; 

    request({ 
     method: 'GET', 
     url: 'https://api.parse.com/1/classes/' + className, 
     headers: { 
      'X-Parse-Application-Id': PARSE_APPLICATION_ID, 
      'X-Parse-REST-API-Key': PARSE_REST_API_KEY 
     }, 
     qs: queryString 
    }, function(error, response, body) { 
     if (response.statusCode == 200) { 
      var results = JSON.parse(body).results; 
      Array.prototype.push.apply(allObjects, results); 
      if (results.length == 1000) { 
       // Keep fetching 
       if (skipNb > 10000) { 
        minCreatedAt = results[999].createdAt; 
        skipNb = 0; 
       } 
       getPointingObjectsRecursive(allObjects, className, pointingProperty, skipNb+1000, minCreatedAt, callback); 
      } else { 
       // All objects fetched 
       callback(allObjects); 
      } 
     } else { 
      console.log('Error: ' + response.statusCode); 
      console.log(body); 
      callback(); 
     } 
    }); 
} 

function updatePointingObject(pointingClassName, pointingClassProperty, pointingObjectId, pointedClassName, pointedObjectId, callback) { 
    var pointer = { 
     "__type": "Pointer", 
     "className": pointedClassName, 
     "objectId": pointedObjectId 
    }; 

    var requestBody = {}; 
    requestBody[pointingClassProperty] = pointer; 

    request({ 
     method: 'PUT', 
     url: 'https://api.parse.com/1/classes/' + pointingClassName + '/' + pointingObjectId, 
     headers: { 
      'X-Parse-Application-Id': PARSE_APPLICATION_ID, 
      'X-Parse-REST-API-Key': PARSE_REST_API_KEY, 
      'Content-Type': 'application/json; charset=UTF-8' 
     }, 
     body: JSON.stringify(requestBody) 
    }, function(error, response, body) { 
     if (response.statusCode == 200) { 
      console.log('Updated pointer of ' + pointingClassName + '/' + pointingObjectId + ' to ' + pointedObjectId); 
      callback(); 
     } else { 
      console.log('Error: ' + response.statusCode); 
      console.log(body); 
      callback(); 
     } 
    }); 
} 

Это отредактированная версия файла JSON.

[ 

    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    }, 
    { 
     "TELEPHONE NUMBER":"", 
     "FAMILY NAMES":"", 
     "STREET ADDRESS":"", 
     "CITY, STATE, ZIP CODE":"", 
     "E-MAIL ADDRESS":"" 
    } 
] 

Эти пустые все были в нижней части файла, но удаление их ничего не исправить.

Answer 1

Образец JSON не имеет свойства results, поэтому json.results не определено.

json.length предоставит вам необходимое количество итераций.

JSON.parse("[{},{}]").length => 2