Validate two number fields by comparing values using ng-form angularjs - angularjs

<input type="text" ng-model="num1">
<input type="text" ng-model="num2">
I want to compare numbers entered in above fields and generate error message if num1 < num2 using ng-form. We can do with JS but i want to keep validation simple. Can we implement in HTML tag using ng-form


Try something like this:
<div ng-form="regForm">
<span ng-show="num1>=num2">Num1 cannot be greater than num2</span>
<input name="num1" type="text" ng-model="num1">
<input name="num2" type="text" ng-model="num2">
</div>
JsFiddle: https://jsfiddle.net/sktajbir/6fmvsaf0/25/
Hope this will help you. Thanks.

Related

ng-model convert object to string

Being very new to Angular I have a kinda unusual request.
I have a bunch of input fields
<div class="blurb" ng:repeat="item in fieldData.postData">
<input type="text" class="form-control" ng-model="item.key" />
<input type="text" class="form-control" ng-model="item.operator" />
<input type="text" class="form-control" ng-model="item.value" />
</div>
The values of these fields inturn are bound to another field
<input name="finalVal" type="text" ng-model="fieldData.postData" />
All works fine and I get an object inside finalVal, but I want the object in string format. Is there a way to achieve it without any changes in my controller? The reason being finalVal is basically stored as a string in DB and I cannot modify the data type.
Appreciate the help

How to apply ng-class using String syntax and array syntax?

I am a beginner in angularjs and I read in the doc of angularjs that ng-class can be applied as string and array syntax. so I was trying to apply the ng-class for the below code
(1) Using String Syntax
<p ng-class="style">Using String Syntax</p>
<input type="text" ng-model="style" placeholder="Type here">
(2) Using array Syntax
<p ng-class="[style1, style2]">Using Array Syntax</p>
<input ng-model="style1"
placeholder="Type here"><br>
<input ng-model="style2"
placeholder="Type here"><br>
I was trying to apply css like
.style{
color:red;
}
.style1{
color:blue;
}
.style2{
font-size:30px;
}
but failed. I do not know where I am doing mistake.Any help is appreciated.

you have added the ng-model="style" in input. So what ever you type in the input that will become the class for the 'p' tag because ng-class="style".
check this fiddle http://jsfiddle.net/devjit/wdtk370z/4/
And Type 'style', 'style1', 'style2' in the input field. you will understand what is happening.
<div ng-app>
<p ng-class="style">Using String Syntax</p>
<input type="text" ng-model="style" placeholder="Type here"/>
<p ng-class="[style1, style2]">Using Array Syntax</p>
<input ng-model="style1"
placeholder="Type here"/><br/>
<input ng-model="style2"
placeholder="Type here"/><br/>
</div>

AngularJS - how to sync result of calculated input field to a scope variable

I'm trying to sync the result of a calculated form field into a scope variable. For example:
<div class="form-group">
<label for="val1" class="control-label">Val 1</label>
<input class="form-control" name="val1" type="number" ng-model="data.val1" id="val1">
</div>
<div class="form-group">
<label for="val2" class="control-label">Val 2</label>
<input class="form-control" name="val2" type="number" ng-model="data.val2" id="val2">
</div>
<div class="form-group">
<label for="score" class="control-label">Score</label>
<input class="form-control" name="score" value="{{data.val1+data.val2}}" type="text" id="score">
</div>
<br/>data: {{data}}
How can I sync the result (i.e. the score field) into the scope variable $scope.data.score? I have tried ng-model="data.score" but that breaks the calculation.
You can see the example in action here:
http://plnkr.co/edit/fc9XcyyYGtAk0aGVV35t?p=preview
How do I get the last line to read data: {"val1":1,"val2":2,"score":3}?
Note that I'm looking for a solution that involves minimal to no code support at the controller level. For example, I know you can set up a watch in the controller for both val1 and val2 and then update the score in the watcher. This is what I wanted to avoid, if it's possible in angular at all. If it's not (theoretically) possible, I'd really appreciate an explanation of why it's not.
A quick background might help. Basically we have a simple form builder app that defines a form and all its fields in an xml file. Here's a sample of what the xml would look like:
<form name="test">
<field name="val1" control="textbox" datatype="number">
<label>Val 1</label>
</field>
<field name="val2" control="textbox" datatype="number">
<label>Val 2</label>
</field>
<field name="score" control="textbox" datatype="number">
<label>Score</label>
<calculate>[val1]+[val2]</calculate>
</field>
</form>
When a form is requested, the system will need to pick up the xml, loop through all the fields and generate an angular style html to be served to the browser and processed by angular. Ideally, I want to keep all the form specific logic (validation, show/hide, calculation etc) confined to the html, and keep the controller (js) logic generic for all forms.
The only solution I can come up with is to dynamically load watcher functions, through something like this: eval("$scope.$watch('[data.val1,data.val2]')..."), but as I said, I really want to avoid this, because it's just tedious, and feels extremely dodgy :)

The first dirty way.
In your case you can move all logic from controller into html with using combination of ng-init and ng-change directives.
<div class="form-group">
<label for="val1" class="control-label">Val 1</label>
<input class="form-control" name="val1" type="number" ng-model="data.val1" ng-change="data.score = data.val1 + data.val2" id="val1">
</div>
<div class="form-group">
<label for="val2" class="control-label">Val 2</label>
<input class="form-control" name="val2" type="number" ng-model="data.val2" ng-change="data.score = data.val1 + data.val2" id="val2">
</div>
<div class="form-group" ng-init="data.score = data.val1 + data.val2">
<label for="score" class="control-label">Score</label>
<input class="form-control" name="score" ng-model="data.score" type="text" id="score">
</div>
<br/>data: {{data}}
I don't think that it's the clearest solution, but you can leave your controller without any changes with it.
Demo on plunker.
The second dirty way.
There is one more way, but now you don't need ng-init and ng-change directives. You can add just one dirty expression in html:
<div id="main-container" class="container" style="width:100%" ng-controller="MainController">
{{data.score = data.val1 + data.val2;""}} <!-- key point -->
<div class="form-group">
<label for="val1" class="control-label">Val 1</label>
<input class="form-control" name="val1" type="number" ng-model="data.val1" id="val1">
</div>
<div class="form-group">
<label for="val2" class="control-label">Val 2</label>
<input class="form-control" name="val2" type="number" ng-model="data.val2" id="val2">
</div>
<div class="form-group">
<label for="score" class="control-label">Score</label>
<input class="form-control" name="score" ng-model="data.score" type="text" id="score">
</div>
<br/>data: {{data}}
;"" in expression stops evaluating of angular expression to text in html.
Demo on plunker.

See if this works, in your HTML change,
<input class="form-control" name="score" ng-model = "data.score" type="text" id="score">
and, in your controller do,
var myApp = angular.module('myapp', [])
.controller('MainController', function($scope) {
$scope.data = { val1: 1, val2: 2, score: 3};
$scope.$watch('[data.val1,data.val2]', function (newValue, oldValue) {
$scope.data.score = newValue[0] + newValue[1];
}, true);
})
Demo plunk, http://plnkr.co/edit/gS0UenjydgId4H5HwSjL?p=preview

If you want to know how you can do it, then i have one solution for you make a ng-change event for both of your text box and sum both the number there and use ng-model in the third text box then, you can see it will work as per your need.
For the first time load you need to calculate it out side only.

Angular form that contains nested directive not validating

I have a very simplified bit of html like so:
<call-panel>
<form name="hotListForm" >
<twilio>
<input type="text" name="phoneOtherText" id="phoneOtherText" class="form-control" required="required" ng-model="phoneNumber" ng-pattern="validation" ng-trim="false"/>
<span class="error" ng-show="hotListForm.phoneOtherText.$error.pattern">Not a valid phone number</span>
</twilio>
</form>
</call-panel>
But this doesn't work. Is there a special way to do this when in a nested directive. I have verified pattern is available.
Screenshot of it definitely being in the form and of form structure:

It is not working probably because you have the id set to "phoneOtherText" as well, try changing the id and try

Is ng-model needed when using ng-disabled and $invalid on a form?

I'm using AngularJS and have a form where I want the Submit button to be disabled if some fields are not filled in.
The standard way seems to be the following:
<form ng-app name="myForm">
<label>Name</label>
<input type="text" name="name" ng-model="form.name" required>
<input type="submit" ng-disabled="myForm.name.$invalid">
</form>
http://jsfiddle.net/YMSRU/
However, if I omit the model from the input field the validation doesn't work and I don't need any models on my input fields (I submit my form using the ngUpload directive so it's actually sent to the form action in an iframe).
Is there any solution or should I add random models just to make the validation work? It seems like a bad work-around.

You could simply do the invalid check at the form level, then no need to define a model for each input:
<form ng-app name="myForm">
<label>Name</label>
<input type="text" name="name" required>
<input type="submit" ng-disabled="myForm.$invalid">
</form>

You are missing your model at your test input tag : ng-model="form.name"

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