javascript - How to get AngularJS to update the DOM on ng-repeat array splice? $scope.$apply() returns an error -

-

solved - have plunkr demonstrates issues facing. simple image uploader uses filereader display image (thanks angular-file-uploads). have placed in dynamic form can added , removed.

issues:

  1. in plunkr, dataurl not displayed until after add image clicked. may plunkr issue since image displayed nicely in site. --solved

  2. if upload image onto first form, click add image, , click first tab, delete first tab, data deleted in $scope.images dom not updated. adding $scope.$apply() results in digest in progress error.

  3. the old file name displayed in upload input input empty.

my question is: how can dom updated when image removed?

update: issue #1 solved, issues #2 , #3 remain.

update2: i've tried attaching $scope.$apply <input type="file" onchange="..." removing image splice() not fire onchange event.

update3: i've added simple text input ng-model="image.caption" see if the dom update appropiately. does. dom updates if images[0] deleted images[1] has image.

update4: grundy has identified problem: track $index. removing makes work expected. not sure why though.

you problem track by expression in ngrepeat
says in doc ngrepeat

ngrepeat makes corresponding changes dom:

  • when item added, new instance of template added dom.
  • when item removed, template instance removed dom.
  • when items reordered, respective templates reordered in dom.

so, in case when splice first element, index last element change first , angular think need remove last element dom, , not need change first.

also, $index, $last , etc special properties in ngrepeat scope, avalilable , not depend on track by expresion


Comments

Post a Comment

Popular posts from this blog

Java 3D LWJGL collision -

-
i making 3d java game lwjgl library, , wondering how add collision detection, player not go through models. i using obj models. here objloader class, loads models: package renderengine; import java.io.bufferedreader; import java.io.file; import java.io.filenotfoundexception; import java.io.filereader; import java.util.arraylist; import java.util.list; import models.rawmodel; import org.lwjgl.util.vector.vector2f; import org.lwjgl.util.vector.vector3f; public class objloader { public static rawmodel loadobjmodel(string filename, loader loader){ filereader fr = null; try { fr = new filereader(new file("res/"+filename+".obj")); } catch (filenotfoundexception e) { system.err.println("couldn't load file!"); e.printstacktrace(); } bufferedreader reader = new bufferedreader(fr); string line; list<vector3f> vertices = new arraylist<vector3f...
Read more

spring - SubProtocolWebSocketHandler - No handlers -

-
i have ugly error during deploying spring app on jboss. 18:11:16,025 error [org.apache.catalina.core.containerbase.[jboss.web].[default-host].[/consumer]] (msc service thread 1-7) exception sending context initialized event listener instance of class org.springframework.web.context.contextloaderlistener: org.springframework.context.applicationcontextexception: failed start bean 'subprotocolwebsockethandler'; nested exception java.lang.illegalargumentexception: no handlers @ org.springframework.context.support.defaultlifecycleprocessor.dostart(defaultlifecycleprocessor.java:176) [spring-context-4.1.3.release.jar:4.1.3.release] @ org.springframework.context.support.defaultlifecycleprocessor.access$200(defaultlifecycleprocessor.java:51) [spring-context-4.1.3.release.jar:4.1.3.release] @ org.springframework.context.support.defaultlifecycleprocessor$lifecyclegroup.start(defaultlifecycleprocessor.java:346) [spring-context-4.1.3.release.jar:4.1.3.release] @ org.s...
Read more

methods - python can't use function in submodule -

-
my folder structure this: pythonstuff/ program.py modulea/ __init__.py foo.py bar.py here's code bar.py : def hello(): print("hello, world!") here's code program.py : #!/usr/bin/env python3 modulea import bar bar.hello() i run $ python3 program.py somehow error: file "program.py", line 3, in <module> bar.hello() attributeerror: 'module' object has no attribute 'hello' edit: __init__.py file empty. edit2: after trying realized had bar.py in root directory contained hello() method. bar.py in modulea/ directory empty. add it import os __all__ = [] module in os.listdir(os.path.dirname(__file__)): if module != '__init__.py' , module[-3:] == '.py': __all__.append(module[:-3]) the init .py files required make python treat directories containing packages; done prevent directories common name, such string, unintentionally hiding v...
Read more