由于对输入文本框的过滤而导致绑定列表更改时，角度分页不更新 [英] Angular pagination not updating when bound list changes due to filtering on an input text box
问题描述
这是场景:
我正在使用带有Angular JS和Boostrap UI的ASP.NET MVC网站.我有一个动态的ul列表，该列表由通过对AngularJS的控制器调用提供的数据填充，并通过输入搜索框对该列表进行了过滤.该列表还通过分页(UI Bootstrap控件)进行控制，我已将其设置为在100个左右的列表中每页显示10个结果.该列表会根据用户在搜索框中输入的内容进行过滤，但是我也希望分页进行更新，因此请考虑以下示例:
列表包含10页的项目(100个项目)，用户在输入搜索框中键入一些文本，该列表将列表过滤到20个左右的项目，因此分页应从10页更新为两页. /p>
我认为必须在某个地方设置一个$ watch设置，也许在过滤之后在列表项上，然后更新分页页数，但是我对AngularJS还是陌生的，所以有人可以向我解释一下完成吗?
非常感谢.我已经在下面发布了我的代码:
<div data-ng-app="dealsPage">
<input type="text" data-ng-model="cityName" />
<div data-ng-controller="DestinationController">
<ul>
<li data-ng-repeat="deals in destinations | filter: cityName |
startFrom:currentPage*pageSize | limitTo:pageSize">{{deals.Location}}</li>
</ul>
<br />
<pagination rotate="true" num-pages="noOfPages" current-page="currentPage"
max-size="maxSize" class="pagination-small" boundary-links="true"></pagination>
</div>
var destApp = angular.module('dealsPage', ['ui.bootstrap', 'uiSlider']);
destApp.controller('DestinationController', function ($scope, $http) {
$scope.destinations = {};
$scope.currentPage = 1;
$scope.pageSize = 10;
$http.get('/Deals/GetDeals').success(function (data) {
$scope.destinations = data;
$scope.noOfPages = data.length / 10;
$scope.maxSize = 5;
});
});
destApp.filter('startFrom', function () {
return function (input, start) {
start = +start; //parse to int
return input.slice(start);
};
});
由于分页是链接过滤器的组合，因此Angular不知道当cityName更改时，应将currentPage重置为1.需要用自己的$watch自己处理.
您还需要将startFrom过滤器调整为(currentPage - 1) * pageSize，否则，您总是从第2页开始.
一旦了解，您会发现分页不准确，因为它仍基于destination.length，而不是目的地的过滤子集.为此，您将需要将过滤逻辑从视图移动到控制器，如下所示:
HTML
<div data-ng-app="dealsPage">
<input type="text" data-ng-model="cityName" />
<div data-ng-controller="DestinationController">
<ul>
<li data-ng-repeat="deals in filteredDestinations | startFrom:(currentPage - 1)*pageSize | limitTo:pageSize">{{deals.Location}}</li>
</ul>
<br />
<pagination rotate="true" num-pages="noOfPages" current-page="currentPage" max-size="maxSize" class="pagination-small" boundary-links="true"></pagination>
</div>
JavaScript
var destApp = angular.module('dealsPage', ['ui.bootstrap']);
destApp.controller('DestinationController', function ($scope, $http, $filter) {
$scope.destinations = [];
$scope.filteredDestinations = [];
for (var i = 0; i < 1000; i += 1) {
$scope.destinations.push({
Location: 'city ' + (i + 1)
});
}
$scope.pageSize = 10;
$scope.maxSize = 5;
$scope.$watch('cityName', function (newCityName) {
$scope.currentPage = 1;
$scope.filteredDestinations = $filter('filter')($scope.destinations, $scope.cityName);
$scope.noOfPages = $scope.filteredDestinations.length / 10;
});
});
destApp.filter('startFrom', function () {
return function (input, start) {
start = +start; //parse to int
return input.slice(start);
};
});
Here's the scenario:
I am using an ASP.NET MVC site with Angular JS and Boostrap UI. I have a dynamic ul list populated by data fed through a controller call to AngularJS, filtering on that list through an input search box. The list is also controlled through pagination (UI Bootstrap control) that I've setup to show 10 results per page for the list of 100 or so items. This list is filtered as the user types in the search box, however I would like the pagination to update as well so consider the following example:
The list has 10 pages of items (100 items), the user types some text in the input search box which filters the list down to 20 or so items, so the pagination should be updated from 10 pages to two pages.
I figure there must be a $watch setup somewhere, perhaps on the list items after it has been filtered and then update the pagination page count, however I'm pretty new to AngularJS so can someone please explain to me how this could be done?
Thanks very much. I have posted my code below:
<div data-ng-app="dealsPage">
<input type="text" data-ng-model="cityName" />
<div data-ng-controller="DestinationController">
<ul>
<li data-ng-repeat="deals in destinations | filter: cityName |
startFrom:currentPage*pageSize | limitTo:pageSize">{{deals.Location}}</li>
</ul>
<br />
<pagination rotate="true" num-pages="noOfPages" current-page="currentPage"
max-size="maxSize" class="pagination-small" boundary-links="true"></pagination>
</div>
var destApp = angular.module('dealsPage', ['ui.bootstrap', 'uiSlider']);
destApp.controller('DestinationController', function ($scope, $http) {
$scope.destinations = {};
$scope.currentPage = 1;
$scope.pageSize = 10;
$http.get('/Deals/GetDeals').success(function (data) {
$scope.destinations = data;
$scope.noOfPages = data.length / 10;
$scope.maxSize = 5;
});
});
destApp.filter('startFrom', function () {
return function (input, start) {
start = +start; //parse to int
return input.slice(start);
};
});
Because your pagination is a combination of chained filters, Angular has no idea that when cityName changes, it should reset currentPage to 1. You'll need to handle that yourself with your own $watch.
You'll also want to adjust your startFrom filter to say (currentPage - 1) * pageSize, otherwise, you always start at page 2.
Once you get that going, you'll notice that your pagination is not accurate, because it's still based on destination.length, and not the filtered sub-set of destinations. For that, you're going to need to move your filtering logic from your view to your controller like so:
HTML
<div data-ng-app="dealsPage">
<input type="text" data-ng-model="cityName" />
<div data-ng-controller="DestinationController">
<ul>
<li data-ng-repeat="deals in filteredDestinations | startFrom:(currentPage - 1)*pageSize | limitTo:pageSize">{{deals.Location}}</li>
</ul>
<br />
<pagination rotate="true" num-pages="noOfPages" current-page="currentPage" max-size="maxSize" class="pagination-small" boundary-links="true"></pagination>
</div>
JavaScript
var destApp = angular.module('dealsPage', ['ui.bootstrap']);
destApp.controller('DestinationController', function ($scope, $http, $filter) {
$scope.destinations = [];
$scope.filteredDestinations = [];
for (var i = 0; i < 1000; i += 1) {
$scope.destinations.push({
Location: 'city ' + (i + 1)
});
}
$scope.pageSize = 10;
$scope.maxSize = 5;
$scope.$watch('cityName', function (newCityName) {
$scope.currentPage = 1;
$scope.filteredDestinations = $filter('filter')($scope.destinations, $scope.cityName);
$scope.noOfPages = $scope.filteredDestinations.length / 10;
});
});
destApp.filter('startFrom', function () {
return function (input, start) {
start = +start; //parse to int
return input.slice(start);
};
});
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