AngularJS check if promise is empty or not

僤鯓⒐⒋嵵緔 提交于 2020-01-07 09:35:06

问题


Hi I have this code for the purpose of checking if there are users in the database, if it finds shows a list of users on a view, otherwise shows a view with form of user creation, but didn't work the check expression what I'm doing wrong

users = Users.query();

users.$promise.then(
    function (data) {
        if (!data) {
            $location.url('/NewUser')
        } else {
            $location.url('/UsersList')
        }

    });

回答1:


It is probably returning an empty array in case nothing is found. Try checking the data length.

if (data.length == 0) {
   $location.url('/NewUser')
} else {
   $location.url('/UsersList')
}


来源:https://stackoverflow.com/questions/32445789/angularjs-check-if-promise-is-empty-or-not

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