Question

我正在阅读Parse anypic 教程并且来自Android背景我很难理解Android等效于此Parse查询。我已经尝试了几个小时，谷歌搜索了很多但没有用。这是关于在时间线上显示朋友的帖子。

- (PFQuery *)queryForTable {
    // Query for the friends the current user is following
    PFQuery *followingActivitiesQuery = [PFQuery queryWithClassName:kPAPActivityClassKey];
    [followingActivitiesQuery whereKey:kPAPActivityTypeKey equalTo:kPAPActivityTypeFollow];
    [followingActivitiesQuery whereKey:kPAPActivityFromUserKey equalTo:[PFUser currentUser]];

    // Using the activities from the query above, we find all of the photos taken by
    // the friends the current user is following
    PFQuery *photosFromFollowedUsersQuery = [PFQuery queryWithClassName:self.className];
    [photosFromFollowedUsersQuery whereKey:kPAPPhotoUserKey matchesKey:kPAPActivityToUserKey inQuery:followingActivitiesQuery];
    [photosFromFollowedUsersQuery whereKeyExists:kPAPPhotoPictureKey];

    // We create a second query for the current user's photos
    PFQuery *photosFromCurrentUserQuery = [PFQuery queryWithClassName:self.className];
    [photosFromCurrentUserQuery whereKey:kPAPPhotoUserKey equalTo:[PFUser currentUser]];
    [photosFromCurrentUserQuery whereKeyExists:kPAPPhotoPictureKey];

    // We create a final compound query that will find all of the photos that were
    // taken by the user's friends or by the user
    PFQuery *query = [PFQuery orQueryWithSubqueries:[NSArray arrayWithObjects:photosFromFollowedUsersQuery, photosFromCurrentUserQuery, nil]];
    [query includeKey:kPAPPhotoUserKey];
    [query orderByDescending:@"createdAt"];
    . . .
    return query;
}

我只想要这行的android等价物：

[photosFromFollowedUsersQuery whereKey:kPAPPhotoUserKey matchesKey:kPAPActivityToUserKey inQuery:followingActivitiesQuery];

我查看了Parse文档和AnyPic项目的快速等价物，但没有用。

Answer 1

我自己想出来了。以下是等效的

<强>的iOS

www.ipnurl.com

<强>的Android

[photosFromFollowedUsersQuery whereKey:kPAPPhotoUserKey matchesKey:kPAPActivityToUserKey inQuery:followingActivitiesQuery];

Android相当于ios的这个解析查询

1 个答案: