$ scope更改时重新运行反应式助手

Question

I have a reactive data source in Angular-Meteor and would like to find a way to make the reactive function re-run after I change another of the $scope values. Here, I want to change the sort order based on $scope.model.sort:

angular.module('...').controller('MyCtrl', [...], function(...){

    //Subscribe
    $scope.subscribe('articles');

    //Init
    $scope.model = {
        sort: 1,
        ...
    }

    //Reactive definitions
    $scope.helpers({
        articles: () => {
            console.log("+ articles");
            return Articles.find({...}, {sort: {colToSort: $scope.model.sort} });
        }
    });

I then change the sort order in the html or by calling a function:

ng-click="model.sort=-1"
ng-click="setSort(-1)"

JS

    $scope.setSort = function(sort) {
        console.log("+ setResourcesSort(%s)", sort);
        $scope.model.sort = sort;
    }

Neither of these ways seems to re-run the reactive helper. Is it possible to make the reactive helper re-run when the referenced $scope.model.sort is changed?

Answer 1

maybe you need add getReactively

  $scope.model = { sort: 1, ... } //Reactive definitions $scope.helpers({ articles: () => { console.log("+ articles"); return Articles.find({...}, {sort: {colToSort: $scope.getReactively('model.sort')} }); } }); 

Reading api document for more detail

Answer 2

The helper needs to be in a reactive area, right now it does not seem to be so. You have $scope as a helper but not linked to anything? So if you put it in a template helper, it will run whenever scope changes, but as a stand alone helper (as it seems right now) it will not re-run automatically when the data context changes.