How to pass controller Function variable to Datepicker Directive? - angularjs

Question

I am new to Angularjs. I have put 2 Datepickers. I need that When I select date from first datepicker then the smaller dates from that date should be disabled in second Datepicker. I am unable to set "minDate" for second Datepicker directive.
Below is my code :
HTML Code :
<div ng-controller='TestController'>
<label>From Date :</label>
<input type="text" id="1" datepicker="" ng-init="variable=''"
ng-model="startDate" ng-change="test()" />
<label>To Date :</label>
<input type="text" id="2" callFuc="test()" datepicker1=""
ng-model="endDate" />
</div>
Js Code:
app.controller('TestController', function($scope, $window) {
$scope.test = function() {
$scope.variable = $scope.startDate;
$window.alert("From date is" + $scope.variable);
};
});
app.directive('datepicker', function() {
return {
require: 'ngModel',
link: function(scope, el, attr, ngModel) {
$('#1').datepicker({
minDate: 0,
onSelect: function(dateText) {
scope.$apply(function() {
ngModel.$setViewValue(dateText);
});
}
});
}
};
});
app.directive('datepicker1', function() {
return {
require: 'ngModel',
link: function(scope, el, attr, ngModel) {
$('#2').datepicker({
minDate: scope.test(),
onSelect: function(dateText) {
scope.$apply(function() {
ngModel.$setViewValue(dateText);
});
}
});
}
};
});
I am able to disable past dates in first Datepicker using minDate : "0".
But I am unable to set minDate properly for the second Datepicker. I am not able to fetch selected date from the First Datepicker and pass it to "datepicker1" directive. Any help or suggestion will be appreciated.
Update
I have updated code. Kindly review it.
https://plnkr.co/edit/ohCFzpwLGgFPPH49jybq?p=preview

Answer 1

The datepicker directive needs to watch for changes and update minDate as needed:
app.directive('datepicker1', function() {
return {
require: 'ngModel',
link: function(scope, el, attr, ngModel) {
scope.$watch(attr.minDate, function(value) {
el.datepicker({
minDate: value,
onSelect: function(dateText) {
scope.$apply(function() {
ngModel.$setViewValue(dateText);
});
}
});
});
}
};
});
Usage:
<label>To Date :</label>
<input type="text" min-date="variable" datepicker1
ng-model="endDate" />