使用Android平台更新parse.com中每行的值 [英] updating values per row in parse.com using android platform

问题描述

我在更新名为parse.com的云存储站点中的每行值时遇到问题。我只是使用parse.com的新手。我已阅读有关文档并了解它。但是我想做的和那里的例子有些不同。这是我的代码。

I have a problem with updating values per row in a cloud storage site called parse.com. I am only a newbie in using parse.com. I have read the documentation about it and have understand it. But what I want to do is a little bit different from the example there. Here's my code..

public void onClick(View arg0) {
    if (arg0.getId() == R.id.button1) {
        ParseQuery query = new ParseQuery("inventory");
        query.findInBackground(new FindCallback() {

              public void done(List<ParseObject> test, ParseException e) {

                  ParseObject testObject = new ParseObject("inventory");
                  if(e==null) { 
                      String str="";
                      String str2="";
                      for(int x =0;x<test.size();x++){
                          str = test.get(x).getString("name");
                          str2 = test.get(x).getString("quantity");
                          if (!str.equals(et1.getText().toString())){
                             str = "";
                          }
                          if(str.equals(et1.getText().toString()))
                          {


                                      testObject.put("quantity", et2.getText().toString());
                                      testObject.saveInBackground();

                              x = test.size();
                          }
                          else{
                              tv1.setText("error" + e.getMessage());
                          }
              }


                  }}

        });

    } }

我想更新商品名称的数量我已经输入了。当我输入的内容等于云上的名称时，它将更新另一列，该列引用我输入的产品名称。但是由于我的代码，它创建了一个新行，而不是更新现有行..我的代码中缺少/错误的是什么？有人可以帮帮我吗？ ：） 提前致谢！ ：）

I want to update the quantity of the product name that i have inputted. when my input is equal to the name on the cloud it will update the other column which refers to the product name that I have inputted. But as a result of my code, it creates a new row, instead of updating the existing row.. what is lacking/wrong in my code? can someone please help me? :) thanks in advance! :)

推荐答案

我正在解决相同的问题。我发现此：

I'm figuring out the same problem. I have found this:

答案是要更新现有对象，您需要首先对其进行检索。其网站上的文档中提供了检索方法。

The answer says to update an existing object, you need to retrieve it first. The retrieve method is given in the documentation on their website.

编辑：
完成！这是您的操作方式；首先获取对象，然后通过update方法更新所需的值。

Done! Here is how you do it; first fetch the object and then update the values you want to through the update method.

ParseQuery query = new ParseQuery("UserName");
            query.getInBackground("GKIp4pxBrF", new GetCallback() {
              public void done(final ParseObject object, ParseException e) {
                if (e == null) {

                    object.put("Name", username);
                    object.saveInBackground(new SaveCallback() {
                    public void done(ParseException e) {

                    object.put("Name", oldname);

                }
              });

             }

                else { 
                 e.printStackTrace();
                }

        }
});

如果您不事先知道对象代码，建议您遍历所需的行查询。

In case you don't know the object code before hand, I suggest you find the required row through a query.

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