Question

Nodejs显示的是一个记录，而不是三个。

我在posts表下的数据库中有3条记录，但是下面的nodejs代码仅显示一条记录，而不是3条记录。我将不胜感激。有人可以帮我解决这个问题。

JSON {'id': 1, 'completed': False, 'title': 'delectus aut autem', 'userId': 1}
Traceback (most recent call last):
  File "./test.py", line 25, in <module>
    json = json.loads(request.decode('utf-8'))
AttributeError: 'dict' object has no attribute 'loads'

Answer 1

您要声明循环内的obj更改范围，请尝试

exports.display = function (req, res) {
    var userid = 5;

    db.query('SELECT * FROM posts', function (error, results, fields) {
        if (error) {
            res.json({
                message: 'issue with query'
            })
        } else {
            var objs = []; // <= Declare objs here
            var resultCount = results.length; // <= Declare count of total queries here
            successfulQueries = 0; // <= Increase this when a callback is called

            results.forEach(function (row) {

                var postid = row.id;
                var title = row.title;
                var content = row.content;
                var type = -1;

                console.log(title);

                db.query('SELECT count(*) as cntStatus,type FROM like_unlike WHERE postid=?', [postid], function (error, results, fields) {
                    successfulQueries++;
                    const total_count = results[0].cntStatus;

                    objs.push({
                        id: postid,
                        title: title,
                        content: content,
                        like: total_count
                    });

                    if (resultCount === successfulQueries) {
                        res.end(JSON.stringify(objs));
                        console.log('Finish');
                    }
                })
            });
        }
    });
}

nodejs在数据库中显示一个记录而不是三个记录

1 个答案: