How to efficiently transfer search parameters from a complex search form in AngularJs to a service using a personalized data model?

I am facing a challenge with coding a large search form in AngularJS. The form has around 45 inputs and I am new to Angular, so I'm struggling to find the best approach. My main issue is figuring out how to handle passing values from the form while using a service in an injected factory.

Here's the current structure of my project:

app.js - app module
search.js - search controller
datacontext.js - service factory
search.html - search form view

The datacontext contains a Search function that triggers the search service call:

    function Search(searchForm) {
        var deferred = $q.defer();

        var requestParameters = {
            UserId: 1234,
            IpAddress: '127.0.0.1',
            QuickSearch: true
        };

        var request = {
            SearchParameters: searchForm,
            RequestParameters: requestParameters
        };

        $http.post(url, request)
            .success(function (data, status) {
                deferred.resolve(data);
            })
            .error(function(data, status) {
                deferred.reject(data);
            });
    }

To simplify the Search function, I pass in a search object containing all search properties like firstName, lastName, dob, etc. When calling this function from the search controller, can I simply pass in the $scope from the form (e.g., ng-click='RunSearch($scope)')?

Additionally, I need to ensure that the user enters criteria before running the search. How can I implement a feature to count the criteria being passed in when they click the search button? Any advice or tips from experienced developers would be greatly appreciated. Thank you!

Answer №1

It looks like you're heading in the right direction with using the search object to bind form fields to properties. This way, creating and managing forms becomes much simpler.

When it comes to passing scope from the form through ng-click, it's best to avoid including "$scope" directly. Instead, just pass the search object itself (e.g., ng-click='RunSearch(searchObject)'). Alternatively, if RunSearch is within the same controller, it can access the search object without needing to be passed explicitly (ng-click='RunSearch()' within the same scope).

In terms of form validation, a good approach would be for the RunSearch function to check the search object for valid input. If no valid search term is found, set the $invalid flag on the form and return false. Then, display an error message tied to that invalid flag in the view to prompt users to enter at least one search term.

You could implement something like this:

<form name="searchform">
  <input ng-model="searchObject.firstName" type="text">
  <input ng-model="searchObject.lastName" type="text">

  <button ng-click="RunSearch(searchObject)">Search</button>
  <span ng-show="!searchform.$invalid">Please enter at least 1 search term</span>
</form>

And in the controller:

$scope.RunSearch = function(searchObject) {
  if(!checkSearchObject(searchObject)) {
    $scope.searchform.$invalid = true;
    return false;
  }
  else performSearch(searchObject)
}

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