javascript - What's wrong with passing parameters here?

Question

The interface provided by the background is like this

I can’t request the data by writing like this, but I can by writing like this

How to break it

Answer 1

It should be that codeAndName is undefined.

Answer 2

Print the passed parameters in one line between function and $http.post to know the problem

console.log('pageNum---', pageNum);
console.log('pageSize---', pageSize);
console.log('codeAndName---', codeAndName);

I guess it’s undefined, let’s print it out first

Answer 3

Two questions, one is the undefined question mentioned above. Also, if your angular is a relatively new version, then the .success method has been cancelled, and .then() should be used.

$http.post(url,data).then(function(response){
    //得到数据后的逻辑
})

Also, judging from your two pieces of code, it should take no more than a month for you to learn programming. Still need to work harder.

Answer 4

function loadData(codeAndName, pageSize, pageNum) {
    // 在这里对参数进行默认值设定，而不是在 success 里
    codeAndName = codeAndName || "";
    pageSize = pageSize || 10;
    pageNum = pageNum || 1;

    // 我猜这里要设置 isLoading = true，表示加载进行中
    // 这样和下面的 $scope.isLoading = false 才对称
    $scope.isLoading = true;

    $http.post(/*.....*/)
        .success(function(data) {
            $scope.isLoading = false;

            if (!data) {
                // do something while failing
            } else {
                // do something right;
            }
        });
}