javascript - IDBKeyRange.only() returns only first matching record -

-

i querying database table follows:

function getallrecords(letter) {      var trans = db.transaction(["observablestates"],"readonly").objectstore("observablestates").index('letterindex');      //get matching records      var request = trans.opencursor(idbkeyrange.only([letter]));       request.onsuccess = function(event)      {           var cursor = event.target.result;           if(cursor)           {               count+=1;               cursor.continue();               console.log(cursor);           }        }        request.onerror = function(event)       {           console.log('error loading data table');       }       //delete of returned records

}

i have 2 records having value of letter first record returned. cursor.continue() not seem work in case.

any appreciated. thanks

that should work, , can't reproduce problem. it's possible you're hitting browser bug (which browser testing in?) or there's incorrect assumption in code i'm not capturing here.

here's i'm doing:

var openrequest = indexeddb.open('test'); openrequest.onupgradeneeded = function() {   var db = openrequest.result;   var store = db.createobjectstore('observablestates');   store.createindex('letterindex', 'p');    store.put({p: ['a']}, 1);   store.put({p: ['a']}, 2); }; openrequest.onsuccess = function() {   var db = openrequest.result;   var trans = db.transaction('observablestates', 'readonly');   var index = trans.objectstore('observablestates').index('letterindex');   var request = index.opencursor(idbkeyrange.only(['a']));   request.onsuccess = function() {     var cursor = request.result;     if (cursor) {       console.log(cursor.key, cursor.primarykey);       cursor.continue();     }   } };

and see logged:

  • ["a"] 1
  • ["a"] 2

you may want count([letter]) request against index confirm have many records expect.


Comments

Post a Comment

Popular posts from this blog

jsf - "PropertyNotWritableException: Illegal Syntax for Set Operation" error when setting value in bean -

-
this question has answer here: how send form input values , invoke method in jsf bean 1 answer i error when trying send values jsf page bean. i want set values fields in bean, create airplane instance , add database. error telling me use illegal syntax setter part of bean. why error? didnt find on site helped me problem. here jsf part: <h4>add plane</h4> <c:if test="#{not empty listairplanebb.error}"> <div class="alert alert-danger"> <span class="glyphicon glyphicon-remove"></span> <h:outputtext value="#{listairplanebb.error}" /> </div> </c:if> <h:form> <table class="table"> <thead> ...
Read more

java - How to read a file created at runtime? -

-
using java 8. basically, in unit test (junit) have code: callsomecode(); asserttrue(new file(this.getclass().getresource("/img/dest/someimage.gif").getfile()).exists()); in callsomecode() , have this: inputstream = bodypart.getinputstream(); file f = new file("src/test/resources/img/dest/" + bodypart.getfilename()); //filename being someimage.gif fileoutputstream fos = new fileoutputstream(f); byte[] buf = new byte[40096]; int bytesread; while ((bytesread = is.read(buf)) != -1) fos.write(buf, 0, bytesread); fos.close(); the first time test runs, this.getclass().getresource("/img/dest/someimage.gif") returns null although file created. the second time (when file created during first test run overwritten), non-null , test passes. how make work first time? should configure special setup in intellij automatically refresh folder file created? note have basic maven structure: --src ----test ------resources as comment n...
Read more

php - Autoloader issue not returning Class -

-
problem? bootloader (autoloader) not seem working properly, or i'm missing something. here simplified code. the code below returns class "skeleton" not exist. on index.php file. index.php <?php include 'bootloader.php'; use skeleton\html\loginheader; $tool = new skeleton/html/loginheader(); bootloader.php <?php function boot($classname) { $filename = ''; $namespace = ''; // sets include path "src" directory $includepath = dirname(__file__).directory_separator.'src'; if (false !== ($lastnspos = strripos($classname, '\\'))) { $namespace = substr($classname, 0, $lastnspos); $classname = substr($classname, $lastnspos + 1); $filename = str_replace('\\', directory_separator, $namespace) . directory_separator; } $filename .= str_replace('_', directory_separator, $classname) . '.php'...
Read more