unpinAllInBackground(List< ...&gt ;, DeleteCallback)之后，对象仍在localstore中

问题描述

我在Android应用中使用Parse.com.我正在制作一个协作式购物清单，该清单允许用户标记要删除的项目(它们变成灰色)，但是只有在我按同步"按钮(并且有可用的网络)时，它们才会被实际删除.当前，将从解析数据库中删除对象，但不会从本地数据存储中删除对象.我正在尝试:

I'm using Parse.com in my Android app. I'm making a collaborative shopping list which allows the user to mark items for deletion (they turn grey), but they only get actually deleted when I press the Sync button (and there's a network available). Currently, the objects are erased from parse database but not from the local datastore. I'm trying this:

 ParseQuery<ShoppingItem> queryDeletes = ShoppingItem.getQuery();
    queryDeletes.fromPin(MyApplication.ALL_ITEMS);
    queryDeletes.whereEqualTo("isDeleted", true);
    queryDeletes.findInBackground(new FindCallback<ShoppingItem>() {
        @Override
        public void done(final List<ShoppingItem> items, ParseException e) {
            if (e == null) {
                ShoppingItem.deleteAllInBackground(items, new DeleteCallback() {
                    @Override
                    public void done(ParseException e) {
                        if (e == null) {
                            ShoppingItem.unpinAllInBackground(items, new DeleteCallback() {
                                @Override
                                public void done(ParseException e) {
                                    if (e == null) {
                                        if (!isFinishing()) { 
                                           shoppingListAdapter.loadObjects(); // update the list view
                                        }
                                    }
                                }
                            });
                        }
                    }
                });
            }
        }
    });
}

已经尝试清除ShoppingItem中的应用程序数据并覆盖equals()，但未成功.有什么想法吗?

Already tried clearing app data and overriding equals() in ShoppingItem with no success. Any ideas?

谢谢！

推荐答案

好，所以我解决了.据我了解，我尝试使用解析库是不可能的.

Ok, so I solved it. From what I understood, what I was trying to do is not possible using the parse library.

首先，deleteAllInBackground()还会取消固定对象，因此不需要unpinAllInBackground().

First of all, deleteAllInBackground() also unpins objects, so the unpinAllInBackground() is not needed.

问题是我使用item.pin(MyApplication.ALL_ITEMS)固定了对象，因此取消固定的唯一方法是使用item.unpinInBackground(MyApplication.ALL_ITEMS)传递了引脚名称.但是，批处理版本不允许将项目的集合和引脚名称作为参数传递.因此，无法使用命名的固定销批量取消固定固定销.

The problem is that I was pinning the objects using item.pin(MyApplication.ALL_ITEMS), thus the only way to unpin them is by passing the pin name using item.unpinInBackground(MyApplication.ALL_ITEMS). However, the batch version does not allow to pass as argument both a collection of items AND the pin name. Thus, it isn't possible to batch unpin items with a named pin.

我最终取消了分别通过引脚名称来固定对象的操作.我最大的抱怨是在没有引脚名的情况下执行item.unpinInBackground()不会引发异常，因此我不知道问题出在哪里.

I ended up unpinning the objects individually passing the pin name. The big complain I have is that doing item.unpinInBackground() without the pin name does not throw an exception and thus I was not aware what the problem was.

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