indexing - Deleting multiple records in IndexedDB based on index -

i using indexeddb , have 2 object stores: equip (represents different equipment, primary key tagno) , equipparts (represents parts of piece of equipment , has index based on tag number/serial number, primary key seqno, field tagno represents equipment part part of).

if delete record in equip, want delete records in equipparts bearing tagno of equip (just "where equipparts.tagno = equip.tagno").

excerpt code:

var tx = db.transaction(["equip", "equipparts"],"readwrite"); var estore = tx.objectstore("equip"); var pstore = tx.objectstore("equipparts"); var tagindex = pstore.index("by_tagno"); var pdestroy = tagindex.opencursor(idbkeyrange.only(tagno)); //opens records bearing selected tag number pdestroy.onsuccess = function() {     var cursor = pdestroy.result;     if (cursor) {         if (cursor.value.tagno == tagno) {             pstore.delete(cursor.value.seqno); //i guess i'm wrong here         }         cursor.continue;     } } pdestroy.onerror = function() {     alert("deletion attempt ng"); } var ereq = estore.delete(tagno); ereq.onsuccess = function(e) {     alert("form deletion ok");     window.location = "index.html"; } ereq.onerror = function(e) {     alert("form deletion ng");     window.location = "index.html"; } db.close(); 

the problem record in equip deleted; records in equipparts stay there. there way delete multiple records in indexeddb object store based on non-unique index (which can primary key of parent object store)?

you have primary keys delete records.

var pdestroy = tagindex.openkeycursor(idbkeyrange.only(tagno));  pdestroy.onsuccess = function() {   var cursor = pdestroy.result;   if (cursor) {       pstore.delete(cursor.primarykey);       cursor.continue;   } } 

alternatively, not efficient

var pdestroy = tagindex.opencursor(idbkeyrange.only(tagno));  pdestroy.onsuccess = function() {   var cursor = pdestroy.result;   if (cursor) {       cursor.delete();       cursor.continue;   } }