与 lovefield 的连接承诺异常

Question

抛出的异常：
lovefield.js:2113 Uncaught NotFoundError: 无法在 'IDBDatabase' 上执行 'transaction'：找不到指定的对象存储之一。

大家好，我已经与 Lovefied 争论了很长一段时间，试图让我的数据库架构初始化。我已经将所有内容都包装在 try catch 块中，我怀疑可能存在问题，但那里什么也没有。我已经追踪到抛出异常的 lovefield 函数。scanRowId_ 但是，我仍然不知道是什么原因造成的。如果它像缺少表或缺少字段一样简单明了，它应该在途中破坏了一些东西。想知道是什么原因吗？

附件 1：lovelace 源代码

该部分内容如下：尝试 { var tx = opt_tx || db.transaction([表名]); req = tx.objectStore(tableName).openCursor(null, "prev"); } 抓住 (e) { 拒绝（e）； return; } 是抛出异常的地方。

lf.backstore.IndexedDB.prototype.scanRowId_ = function(opt_tx) {
  var tableNames = this.schema_.tables().map(function(table) {
    return table.getName();
  }), db = this.db_, maxRowId = 0, extractRowId = function(cursor) {
    if (this.bundledMode_) {
      var page = lf.backstore.Page.deserialize(cursor.value);
      return Object.keys(page.getPayload()).reduce(function(prev, cur) {
        return Math.max(prev, cur);
      }, 0);
    }
    return cursor.key;
  }.bind(this), scanTableRowId = function(tableName) {
    return new goog.Promise(function(resolve, reject) {
      var req;
      try {
        var tx = opt_tx || db.transaction([tableName]);
        req = tx.objectStore(tableName).openCursor(null, "prev");
      } catch (e) {
        reject(e);
        return;
      }
      req.onsuccess = function(ev) {
        var cursor = ev.target.result;
        cursor && (maxRowId = Math.max(maxRowId, extractRowId(cursor)));
        resolve(maxRowId);
      };
      req.onerror = function() {
        resolve(maxRowId);
      };
    });
  }, execSequentially = function() {
    if (0 == tableNames.length) {
      return goog.Promise.resolve();
    }
    var tableName = tableNames.shift();
    return scanTableRowId(tableName).then(execSequentially);
  };
  return new goog.Promise(function(resolve) {
    execSequentially().then(function() {
      resolve(maxRowId);
    });
  });
};

图表 2：构建数据库模式的代码

    var buildSchema = function() {

        schemaBuilder = lf.schema.create(urlConfig.dsName, urlConfig.versionNumber);
        console.assert(tableSchemas, 'tableSchemas!=null');
        console.assert(schemaBuilder, 'schemaBuilder!=null');

        angular.forEach(tableSchemas, function(val, key) {

            var item = tableSchemas[key];
            console.assert(item, 'item should not be null');

            var tableName = item['tsName'];
            console.assert(tableName, 'tableName should not be null');

            var fields = item['metaRecords'];
            console.assert(fields, 'fields should not be null');
            var table;

            var isPrimary = '';
            try {
                table = schemaBuilder.createTable(tableName);
            } catch (error) {
                console.log('failed to createTable(' + tableName + ')');
                console.log(error);
            }

            for (var x = 0; x < fields.length; x++) {
                var field = fields[x];
                try {
                    table.addColumn(field['fieldName'], eval(field['dataType']));
                } catch (error) {
                    console.log('failed at table.addColumn(' + field['fieldName'] + ',' + eval(field['dataType']) + ')');
                    console.log(error);
                }
                try {
                    if (field['isPrimary'] === '1') {
                        isPrimary = field['fieldName'];
                    } else {
                        table.addNullable([field['fieldName']]);
                    }
                } catch (error) {
                    console.log('failed at table.addNullable(' + field['fieldName']);
                    console.log(error);
                }
            }

            try {
                if (isPrimary !== '') {
                    if (isPrimary === 'autoid') {
                        table.addPrimaryKey([isPrimary], true);
                    } else {
                        table.addPrimaryKey([isPrimary]);
                    }
                }
            } catch (error) {
                console.log('failed at table.addPrimaryKey('+ [isPrimary]+')');
                console.log(error);
            }

        });
        //
        persistservice.setVal('dbInitialized', true);

    };

图表 3：中断

的代码

具体来说，中断发生在承诺 return 处。

return schemaBuilder.connect().then(function(db) {

/**
 * Instantiates the DB connection (re-entrant).
 * @return {!IThenable<!lf.Database>}
 */
var getDbConnection = function() {
    if (db_ != null) {
        return db_;
    }

    if (!schemaBuilder) {
        buildSchema();
    }

    return schemaBuilder.connect()
        .then(function(db) {
            db_ = db;
            op = lovefield.op;
            fn = lovefield.fn;
            lf = lf;
            onConnected_();
            return db;
        });
};

图表 4：堆栈跟踪

未捕获的 NotFoundError：无法在 'IDBDatabase' 上执行 'transaction'：找不到指定的对象存储之一。（匿名函数）@

堆栈跟踪： lovefield.js:2113setTimeout (async)goog.async.throwException @ lovefield.js:2112(anonymous function) @ lovefield.js:2589goog.async.run.processWorkQueue @ lovefield.js:2250Promise.resolve (async)goog.async.run.schedule_ @ lovefield.js:2227goog.async.run @ lovefield.js:2220goog.Promise.scheduleCallbacks_ @ lovefield.js:2515goog.Promise.resolve_ @ lovefield.js:2480(anonymous function) @ lovefield.js:2302(anonymous function) @ lovefield.js:6393goog.Promise @ lovefield.js:2290scanTableRowId @ lovefield.js:6387execSequentially @ lovefield.js:6410(anonymous function) @ lovefield.js:6413goog.Promise @ lovefield.js:2290lf.backstore.IndexedDB.scanRowId_ @ lovefield.js:6412(anonymous function) @ lovefield.js:6316IndexedDB (async)(anonymous function) @ lovefield.js:6301goog.Promise @ lovefield.js:2290lf.backstore.IndexedDB.init @ lovefield.js:6298lf.base.init @ lovefield.js:11246lf.proc.Database.init @ lovefield.js:11548lf.schema.Builder.connect @ lovefield.js:12202getDbConnection @ lovefieldservice.js:181lovefieldService @ lovefieldservice.js:194instantiate @ angular.js:4619(anonymous function) @ angular.js:4459invoke @ angular.js:4604enforcedReturnValue @ angular.js:4443invoke @ angular.js:4604(anonymous function) @ angular.js:4403getService @ angular.js:4550injectionArgs @ angular.js:4574instantiate @ angular.js:4616(anonymous function) @ angular.js:9870(anonymous function) @ angular-ui-router.js:4081invokeLinkFn @ angular.js:9492nodeLinkFn @ angular.js:8978compositeLinkFn @ angular.js:8226publicLinkFn @ angular.js:8106(anonymous function) @ angular.js:8447updateView @ angular-ui-router.js:4021(anonymous function) @ angular-ui-router.js:3959Scope.$broadcast @ angular.js:17143$state.transition.resolved.then.$state.transition @ angular-ui-router.js:3352processQueue @ angular.js:15552(anonymous function) @ angular.js:15568Scope.$eval @ angular.js:16820Scope.$digest @ angular.js:16636Scope.$apply @ angular.js:16928done @ angular.js:11266completeRequest @ angular.js:11464requestLoaded @ angular.js:11405XMLHttpRequest.send (async)(anonymous function) @ angular.js:11442sendReq @ angular.js:11235serverRequest @ angular.js:10945processQueue @ angular.js:15552(anonymous function) @ angular.js:15568Scope.$eval @ angular.js:16820Scope.$digest @ angular.js:16636Scope.$apply @ angular.js:16928bootstrapApply @ angular.js:1694invoke @ angular.js:4604doBootstrap @ angular.js:1692bootstrap @ angular.js:1712angularInit @ angular.js:1606(anonymous function) @ angular.js:30423fire @ jquery.js:3182self.fireWith @ jquery.js:3312jQuery.extend.ready @ jquery.js:3531completed @ jquery.js:3547

Answer 1

好的伙计们，我刚刚清除了我的 IndexedDB 数据存储 indexedDB.deleteDatabase('adDB'); 然后就把它修好了。 Derp 对我来说。由于某种原因，它正在拿起我所有的桌子，但只有一张。（可能是因为在我遍历数组中的所有表之前，数据库抛出错误并在之前的修订版上完成。如有疑问，请将其清除！！！

关于如何清除 indexedDb 数据存储的这个答案也值得称赞。 How to delete indexedDB in Chrome

与 lovefield 的连接承诺异常

Exception on connect promise with lovefield

javascript

google-chrome

indexeddb

angularjs

lovefield

附件 1：lovelace 源代码

图表 2：构建数据库模式的代码

图表 3：中断

图表 4：堆栈跟踪