javascript - Data keeps on duplicating after adding to database -

-

i have table has starting id of 1. have function gets last added id using limittolast(1) , added 1 next data add database have 2 key if ever last added id 1.but happened this:

this whatt happened in database

it added 2 key data added continues add more , duplicates data. code:

   function uploadproperty() {       user = firebase.auth().currentuser;   var selectedfile;   var propertiesref = db.ref('property/');   propertiesref.orderbychild("property").limittolast(1).on("child_added",    function(snapshot) {     var getkey = number(snapshot.key);    var id = getkey + 1;    firebase.database().ref("property/" + id).set({       property_id: id,      user_id: user.uid,      property_desc: $("#desc").val() ,       property_address: $("#address0").val() ,          property_slot: $("#slot").val(),      property_price: $("#price").val(),      rent_type: $("#renttype").val(),      type: $("#type").val(),      lat: $("#lat").val(),      lon: $("#lon").val(),      date_created: $("#datecreated").val(),        image_path: $("#image").val()      });     desc.value = '';      address0.value = '';     slot.value  = '';   price.value  = '';   type.value  = '';   renttype.value  = '';   lat.value  = '';   lon.value  = '';        });   }

you should using once() instead of on(). on() leaves listener attached, when store new child with:

firebase.database().ref("property/" + id).set(...);

the listener fires again.


Comments

Post a Comment

Popular posts from this blog

ZeroMQ on Windows, with Qt Creator -

-
i have installed zmq link given below on windows 7. http://zeromq.org/distro:microsoft-windows 1) have c++ project in qt-creator , i'm using zmq c++ binding (zhelpers.hpp etc). 2) have added .lib installed zmq folder qtcreator 3) while compiling, compiler looks _imp__zmq_verion, in .dll files present in .lib have __imp_zmq_version. 4) causing undefined reference zmq_version. anyone else faced problem , has solution ?
Read more

unity3d - Unity SceneManager.LoadScene quits application -

-
i have 2 different scenes 1 named 'main' , other 'game' both added scenes in load. when use scenemanager.loadscene("game"); works no problem when tried return main scene code if (input.getkeydown (keycode.escape)) { scenemanager.loadscene("main"); } strangely game quits. thanks. sorry interruption. somewhere on other script found code. if (input.getkeydown (keycode.escape)) { application.quit (); } that's bad, know...
Read more

python - Error while using APScheduler: 'NoneType' object has no attribute 'now' -

-
i have python app hosting on heroku. use apscheduler call function every day @ time. strange thing 1 time function runs after while have following error log: exception in thread apscheduler (most raised during interpreter shutdown): 2017-09-06t15:03:28.347848+00:00 app[web.1]: traceback (most recent call last): 2017-09-06t15:03:28.347858+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 810, in __bootstrap_inner 2017-09-06t15:03:28.347859+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 763, in run 2017-09-06t15:03:28.347861+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/site-packages/apscheduler/schedulers/blocking.py", line 27, in _main_loop 2017-09-06t15:03:28.348167+00:00 app[web.1]: <type 'exceptions.attributeerror'>: 'nonetype' object has no attribute 'now' any guesses? the full code long here key parts: def startdayauto(): global ...
Read more