Function _getConnection

browser-version/out/nedb.js:6668–6713

(dbInfo, upgradeNeeded)

	    }

	    function _getConnection(dbInfo, upgradeNeeded) {
	        return new Promise(function (resolve, reject) {
	            if (dbInfo.db) {
	                if (upgradeNeeded) {
	                    dbInfo.db.close();
	                } else {
	                    return resolve(dbInfo.db);
	                }
	            }

	            var dbArgs = [dbInfo.name];

	            if (upgradeNeeded) {
	                dbArgs.push(dbInfo.version);
	            }

	            var openreq = indexedDB.open.apply(indexedDB, dbArgs);

	            if (upgradeNeeded) {
	                openreq.onupgradeneeded = function (e) {
	                    var db = openreq.result;
	                    try {
	                        db.createObjectStore(dbInfo.storeName);
	                        if (e.oldVersion <= 1) {
	                            // Added when support for blob shims was added
	                            db.createObjectStore(DETECT_BLOB_SUPPORT_STORE);
	                        }
	                    } catch (ex) {
	                        if (ex.name === 'ConstraintError') {
	                            globalObject.console.warn('The database "' + dbInfo.name + '"' + ' has been upgraded from version ' + e.oldVersion + ' to version ' + e.newVersion + ', but the storage "' + dbInfo.storeName + '" already exists.');
	                        } else {
	                            throw ex;
	                        }
	                    }
	                };
	            }

	            openreq.onerror = function () {
	                reject(openreq.error);
	            };

	            openreq.onsuccess = function () {
	                resolve(openreq.result);
	            };
	        });
	    }

	    function _isUpgradeNeeded(dbInfo, defaultVersion) {
	        if (!dbInfo.db) {