Develop Reference

angularjs change in model renders only on clicking somewhere

I am working on a search suggestion functionality using firebase and angular js. Basically on key up of a search input box, I call the below function:
scope.suggestString = {};
scope.search = function(){
scope.suggestString = {};
firebaseDb.ref("users")
.orderByChild("Name")
.startAt(scope.searchedString)
.endAt(scope.searchedString + "\uf8ff")
.on("value", function(snapshot) {
snapshot.forEach(function(childSnapshot) {
if(scope.suggestString.hasOwnProperty(childSnapshot.key) == false){
scope.suggestString[childSnapshot.key] = childSnapshot;
}
});
});
}
HTML:
<form>
<input type="text" ng-model="searchedString" ng-keyup="search()">
<ul>
<li ng-repeat="(key,item) in suggestString">
{{item.val().firstName}}
</li>
</ul>
</form>
The code works , the call goes to firebase and fetches the records but I have to click somewhere in search input box for the suggestions to be displayed.
I tried using scope.$apply() but its not working .Its says already applying scope

maybe you can use something like:
<input ng-model="searchedString" ng-model-options="{debounce: 1000}" type="text">
on input box, which will update ng-model (searchString) with search string in input element, after 1 second delay of typing.
After that you can put something like:
scope.$watch('searchedString', (newVal,oldVal)=>{
scope.suggestString = {};
if(scope.searchedString.length <3){
return;
}
firebaseDb.ref("users")
.orderByChild("Name")
.startAt(scope.searchedString)
.endAt(scope.searchedString + "\uf8ff")
.on("value", function(snapshot) {
snapshot.forEach(function(childSnapshot) {
if(scope.suggestString.hasOwnProperty(childSnapshot.key) == false){
scope.suggestString[childSnapshot.key] = childSnapshot;
}
});
});
});
Now it should work if your code for getting data is correct.

Angular doesn't know about this async call, so you have to trigger a digest. You can do that safely without getting a console error by calling $evalAsync after you get the response:
// ...
.on("value", function (snapshot) {
scope.$evalAsync(function () {
snapshot.forEach(function (childSnapshot) {
if (scope.suggestString.hasOwnProperty(childSnapshot.key) == false) {
scope.suggestString[childSnapshot.key] = childSnapshot;
}
})
});
});
But I suspect scope.$apply will be fine too, if you do it outside the loop as I am doing above.
Another option is to wrap all of this firebase functionality into a separate function (possibly in a service), and return a promise from that function using the $q service, and resolve the firebase response. Then you won't have to manually trigger a digest, since Angular knows about the $q service.

Safe apply was the thing I was looking for, the search is smooth now.

Display results from api after user input

I'm learning JS and I need some help figuring out why my info isn't getting populated in the html. I'm just trying to get the basic functionality to work, so that I can continue to expand on it.
User is supposed to input a 3 digit route value, which will then return all the route information from an api call. I was able to get the route info to display earlier when I got the api call set up, but I'm struggling to figure why it's not displaying now that I tried adding in a feature to allow the user to input the route. See attached pen
HTML
<div class='container'>
<h1 id='header'>Route Info</h1>
<input id="input" type="text" placeholder="Enter 3 digit route ex 005" >
<input type="button" value="Get Route" onclick="getRoute()">
<br>
<p id = 'p'><span id="routeInfo"></span></p>
</div>
Javascript
$(document).ready(function() {
var route = $('#input');
getRoute.click(function() {
var scriptTag = document.createElement('SCRIPT');
scriptTag.src = "https://wsdot.wa.gov/Traffic/api/Bridges/ClearanceREST.svc/GetClearancesAsJson?AccessCode=59a077ad-7ee3-49f8-9966-95a788d7052f&callback=myCallback&Route=" + route;
document.getElementsByTagName('HEAD')[0].appendChild(scriptTag);
var myCallback = function(data) {
var myarray = Array.prototype.slice.call(data);
document.getElementById("routeInfo").innerHTML = JSON.stringify(myarray);
}
});
});

It looks like you are jumping through a lot of hoops you don't need to. As long as you are using Jquery, you should look into getting the api data with an ajax request. It's much easier and more intuitive. Also you have a few problems such as trying to get the input value with var route = $('#input'); which return the actual input element. You are also processing the returned data in a way that won't work.
Here's a basic example to get you going on (IMO) a better track:
function getRoute() {
var route = $('#input').val();
var url = "https://wsdot.wa.gov/Traffic/api/Bridges/ClearanceREST.svc/GetClearancesAsJson?AccessCode=59a077ad-7ee3-49f8-9966-95a788d7052f&Route=" + route;
$.ajax({url: url, success: function(data){
var retValue = "";
var i = 0
for(i; i< data.length; i++) {
retValue += data[i].BridgeName + "<br>"
}
document.getElementById("routeInfo").innerHTML = retValue;
}});
}

If you intend functionality in the getRoute.click callback to run, you need to rewrite that as a method function getRoute(), or get the button element via jQuery and assign that to the variable getRoute. As it stands, you have the click method wired via the markup to a function named getRoute which does not exist. In the JS you are trying to register a click event to a jQuery object named getRoute which does not exist.

getRoute needs to be a global function for it to be called from html :
getRoute = (function() {
Also, myCallback needs to be a global function for it to be called from your loaded script (just remove the var):
myCallback = function(data) {

updating a json value with angular

I am trying to update an json object value from a textbox using angular and I'm not sure what the best way to go about it is.
This is the json object...
$scope.productAttributes = {
"CostRequirements":[
{
"OriginPostcode": 'NW1BT',
"BearerSize":100
}
]
}
And when a use types in a text field and clicks a button, I would like to grab that textfield value and pass it into the json object to replace the postcose value (OriginPostcode) I tried to pass in a scope variable but that didnt work.
<input type="text" placeholder="Please enter postcode" class="form-control" ng-model="sitePostcode"/>
And this is the fucntion that is fired when the user clicks a button to submit the json
var loadPrices = function () {
productsServices.getPrices1($scope.productAttributes)
.then(function (res) {
$scope.selectedProductPrices = res.data.Products;
// $scope.selectedProductAddOns = res.data.product_addons;
})
.finally(function () {
$scope.loadingPrices = false;
$scope.loadedPrices = true;
});
};
Could anyone tell me what I need to do to put the user input in the textbox into the json object?
Many thanks

What we don't see is the function that runs the update with the button. It should look something like this
// your HTML button
<button ng-click='updateThingy()'>Update</button>
// your HTML input
<input type="text" ng-model="myObject.sitePostcode"/>
// your controller
$scope.myObject = { // ties to the ng-model, you want to tie to a property of an object rather than just a scope property
sitePostcode : $scope.productAttributes.CostRequirements[0].OriginPostcode // load in post code from productAttributes
};
$scope.updateThingy = function(){
$scope.productAttributes.CostRequirements[0].OriginPostcode = $scope.myObject.sitePostcode;
};
Here is a demo plunker for updating a value on button click, hope it helps out.
http://plnkr.co/edit/8PsVgWbr2hMvgx8xEMR1?p=preview

I guess loadPrices function is inside your controller. Well, then you should have sitePostCode variable available inside your controller and your function. So you just need to inject that value inside $scope.productAttributes.
$scope.productAttributes.sitePostCode = $scope.sitePostCode;
This you need to put it before you make the productsServices.getPrices1 call.
var loadPrices = function() {
$scope.productAttributes.sitePostCode = $scope.sitePostCode;
productsServices.getPrices1($scope.productAttributes)
.then(function(res) {
$scope.selectedProductPrices = res.data.Products;
// $scope.selectedProductAddOns = res.data.product_addons;
})
.finally(function() {
$scope.loadingPrices = false;
$scope.loadedPrices = true;
});
};
Let me know if it worked.

How to render HTML with jQuery from an AJAX call

I have a select box with a list of books. The user can select a book and hit the submit button to view the chapters on a separate page.
However, when the user changes the select box, I would like a partial page refresh to display the past notes the user entered on the book, and allow the user to write a new note for that book. I do not want the review and creation of notes for a particular book done on the next page with the chapters, as it will clutter it up.
I'm using Python/Bottle on the backend and its SimpleTemplate engine for the front end.
Currently, when the select box is changed, an ajax call receives a Json string containing the book information and all the notes. This json string is then converted into a json object via jQuery.parseJson().
What I would like to be able to do is then loop over the notes and render a table with several cells and rows.
Would I have to do this in jQuery/js (instead of bottle/template framework) ? I assume so as I only want a partial refresh, not a full one.
I'm looking for a piece of code which can render a table with variable numbers of rows via jQuery/js from a json object that was retrieved with ajax.
<head>
<title>Book Notes Application - Subjects</title>
<script src="http://code.jquery.com/jquery-latest.min.js"
type="text/javascript"></script>
<script>
$(document).ready(function(){
$('#subject_id').change(function(){
var subject_id = $(this).val();
$.ajax({
url : "subject_ajax?subject_id=" + subject_id,
success : function(data) {
alert(data)
json = jQuery.parseJSON(data);
},
error : function() {
alert("Error");
}
});
})
})
</script>
</head>
<body>
<!-- CHOOSE SUBJECT -->
<FORM action="/books" id="choose_subject" name="choose_subject" method="POST">
Choose a Subject:
<select name="subject_id" id="subject_id">
% for subject in subjects:
<option value="{{subject.id}}">{{subject.name}}</option>
% end
</select><input type="submit" name="sub" value="Choose Subject"/>
<BR />
</FORM>

This greatly depends on how your JSON and HTML are formatted. But with a table somewhere like:
<table id="books">
<tr>
<th>Chapter</th>
<th>Summary</th>
</tr>
</table>
You could do something like:
$(function(){
$('#choose_subject').submit(function () {
var subject_id = $(this).val();
$.getJSON("subject_ajax?subject_id=" + subject_id, function(data) {
console.log(data);
$.each(data.chapters, function (index, chapter) {
$('#books').append('<tr><td>' + chapter.title + '</td><td>' + chapter.summary + '</td></tr>');
})
});
return false;
})
})
This supposes JSON like:
{
"notes": [
"Note 1",
"Note 2"
],
"chapters": [
{
"title": "First chapter",
"summary": "Some content"
},
{
"title": "Second chapter",
"summary": "More content"
}
]
}
Other notes:
If you use HTML 4 or earlier, keep all your tags in upper case. If you're using XHTML or HTML5, keep all your tags in lower case.
You don't need $(document).ready(function () {...}), with recent versions of jQuery $(function () {...} ) works the same and it's easier to read.
You can use $.get instead of $.json if you're only using the success state (as you are here). And if you're confident that the data you'll get is valid JSON, you can use getJSON instead of get. It will parse the JSON for you deliver it to you as a JavaScript object automatically.
It's usually more convenient to use console.log rather than alert when you're testing. Actually, it's usually a bad idea in general to ever use alert.

I'm not familiar with Python/Bottle or its SimpleTemplate engine, but you could consider generating the html for the table on the server side and returning it in the ajax response, rather than returning JSON.
var subject_id = $(this).val();
$.ajax('subject_ajax', {
type: 'get',
data: { subject_id: subject_id },
dataType: 'html',
success : function(html) {
// Insert the html into the page here using ".html(html)"
// or a similar method.
},
error: function() {
alert("Error");
}
});
When calling .ajax():
The "type" setting defaults to "get", but I prefer to explicitly set it.
Use the "data" setting for the ajax call to specify the URL parameter.
Always specify the "dataType" setting.
I also recommend you perform the ajax call in an on-submit handler for the form, and add an on-change handler for the select that submits the form.
$(document).ready(function(){
$('#subject_id').change(function() {
$(this.form).submit();
});
$('#choose_subject').submit(function(event) {
event.preventDefault();
var subject_id = $('#subject_id').val();
if (subject_id) {
$.ajax(...);
}
});
});
This way your submit button should work in case it is clicked.

There are a few things you need to look at:
1) Is your SimpleTemplate library included?
2) Have you compiled your template via compileTemplate()?
Once you know your library is included (check console for errors), pass your data returned to your success handler method, compile your template, that update whichever element you are trying to update.
I'm not sure that you want to update the same element that you're defining your template in.
$(document).ready(function(){
$('#subject_id').change(function(){
var subject_id = $(this).val();
$.ajax({
url : "subject_ajax?subject_id=" + subject_id,
success : function(data) {
var template_data = JSON.parse(data);
var template = $('#subject_id').toString(); // reference to your template
var precompiledTemplate = compileTemplate(template);
var result = precompiledTemplate(template_data);
$('#subject_id').append(result);
},
error : function() {
alert("Error");
}
});
})
})
You might also try moving your template out of the element you're trying to update like this:
<script type="text/template" id="subject-select-template">
% for subject in subjects:
<option value="{{subject.id}}">{{subject.name}}</option>
% end
</script>
Then just create a blank select element like so:
<select id="select_id"></select>
Update references. Anyway, hope this is helpful. It should work but I can't test without your specific code ;)
Also, check out this demo example if you haven't yet:
https://rawgithub.com/snoguchi/simple-template.js/master/test/test.html

ngInit not working asynchronously(with $q promise)

Edit:
Plunker is working, actual code isn't:
http://plnkr.co/edit/5oVWGCVeuTwTARhZDVMl?p=preview
The service is contains typical getter\setter stuff, beside that, it functions fine, so I didn't post it's code to avoid TLDR.
TLDR version: trying to ng-init a value fetched with AJAX into the ngModel of the text-area, the request resolves with the correct value, but the textarea remain empty.
parent controller function(talks to the service):
$scope.model.getRandomStatus = function(){
var deffered = $q.defer();
var cid = authService.getCompanyId();
var suggestions = companyService.getStatusSuggestions(cid);
if(suggestions && suggestions.length > 0){
deffered.resolve(suggestions[Math.floor(Math.random(suggestions.length) + 1)].message);
return deffered.promise;//we already have a status text, great!
}
//no status, we'll have to load the status choices from the API
companyService.loadStatusSuggestions(cid).then(function(data){
companyService.setStatusSuggestions(cid, data.data);
var result = data.data[Math.floor(Math.random(data.data.length) + 1)];
deffered.resolve(result.message);
},
function(data){
_root.inProgress = false;
deffered.resolve('');
//failed to fetch suggestions, will try again the next time the compnay data is reuqired
});
return deffered.promise;
}
child controller:
.controller('shareCtrl', function($scope){
$scope.layout.toggleStatusSuggestion = function(){
$scope.model.getRandomStatus().then(function(data){
console.log(data);//logs out the correct text
//$scope.model.formData.shareStatus = data;//also tried this, no luck
return data.message;
});
$scope.model.formData.shareStatus = $scope.layout.toggleStatusSuggestion();//Newly edited
}
});
HTML:
<div class="shareContainer" data-ng-controller="shareCtrl">
<textarea class="textAreaExtend" name="shareStatus" data-ng-model="model.formData.shareStatus" data-ng-init="model.formData.shareStatus = layout.toggleStatusSuggestion()" cols="4"></textarea>
</div>

I believe what you are wanting is :
$scope.model.getRandomStatus().then(function(data){
$scope.model.formData.shareStatus = data.message;
});
Returning something from within then does not return anything from the function wrapping it and therefore does nothing

Turns out that I had a custom validation directive that was watching the changes in the model via $formatters, and limting it to 80 chars(twitter), it was failing silently as I didn't expect to progmatically insert invalid values into my forms, very stupid, but could happen to anyone.
Had to make some changes to it, so it's worth to remember in case it happens to anyone else.