Exploring Nested JSON Objects in Angular

I'm currently exploring ways to extract specific data from a JSON object stored within a scope through filtering or querying.

For instance:

$scope.myBook = {"bookName": "Whatever",
    "pages": [
        {"pageid": 1, "pageBody": "html content for the page", "pageTitle": "Page 1"},
        {"pageid": 2, "pageBody": "html content for the page", "pageTitle": "Page 2"},
        {"pageid": 3, "pageBody": "html content for the page", "pageTitle": "Page 3"},
    ]
}

Is there a way I can specifically retrieve the object with pageid:2?

javascriptangularjs

Answer №1

Here is a useful method for displaying specific page content:

Template:

<div ng-repeat="page in myBook.pages | filter:pageMatch(pageid)">
    {{ page.pageBody }}
</div>

Scope:

$scope.pageMatch = function(pageid) {
    return function(page) {
        return page.pageid === pageid;
    };
};

Simply adjust the value of pageid in filter:pageMatch(pageid) to show the desired page content.

Answer №2

const fetchPage = (identifier) => {
    angular.forEach($scope.myBook.pages, (page, index) => {
        if (page.pageId === identifier) {
            console.log("Perform some action here.");
            return page;
        }
    });
}

If not found...

$scope.myBook.pages[1];

Answer №3

After reaching out to the AngularJS IRC, I was pleasantly surprised when one of the folks there whipped up a plunker that perfectly aligned with my needs.

Check out this Plnkr example

Credit goes to https://github.com/robwormald for providing the solution.

/* For the detailed answer, please refer to the PLNKR link above */

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