如何检索parseObject子类的指针[PARSE SERVER]

Question

我想使用子类，但我遇到了一些问题。 该文档没有说明如何检索具有子类的解析服务器上可用的所有数据类型。

这是我的objOwnFeeds ：

@ParseClassName(ParseIdentifier.ownFeedsClass)

public class objOwnFeeds  extends ParseObject {
    //starter fields
    public String getObjectId() {
        return getString(ParseIdentifier.getObjectIdField());
    }
    public ParseACL getAcl() {
        return getACL();
    }
    public void setAcl(ParseACL acl) {
        setACL(acl);
    }
    public Date getCreatedAt() {
        return getCreatedAt();
    }
    public void setCreatedAt(Date date) {
        setCreatedAt(date);
    }



    //extended fields

      //Strings
        public String getOwnerId() {
            return getString(ParseIdentifier.getOwnerId());
        }
        public String getUserInfoId() {return getString(ParseIdentifier.getUserInfoId());}
        public String getFeedId() {return getString(ParseIdentifier.getFeedId());}
        public String getType() {return getString(ParseIdentifier.getType());}


      //Booleans
      public Boolean isCreatedByMe() {return getBoolean(ParseIdentifier.getCreatedByMe());}
      public Boolean canNotification() {return getBoolean(ParseIdentifier.getCanNotification());}
      public Boolean isLikedByMe() {return getBoolean(ParseIdentifier.getLikedByMe());}
      public Boolean isFollowedByMe() {return getBoolean(ParseIdentifier.getFollowedByMe());}

      //Parse Objects { the problem is here!}
     public objFeed getFeed() {return (objFeed) getParseObject(ParseIdentifier.getFeed());}


      //numbers
      public int getIntervalNotification() {return getInt(ParseIdentifier.getIntervalNotification());}
      public long getLastNotificationSent() {return getLong(ParseIdentifier.getLastNotificationSent());}

}

查找getFeed（） <=此函数需要检索的对象是这样的：

@ParseClassName(ParseIdentifier.feedsClass)

public class objFeed extends ParseObject {

public String getObjectId() {
    return getString(ParseIdentifier.getObjectIdField());
}


public String getNome() {
    return getString(ParseIdentifier.nomeFeedField);
}

public void setNome(String nome) {
    put(ParseIdentifier.nomeFeedField, nome);

}

public String getNomeToLowerCase() {
    return getString(ParseIdentifier.nomeToLowerCaseFeedField);
}

public void setNomeToLowerCase(String nomeToLowerCase) {
    put(ParseIdentifier.nomeToLowerCaseFeedField, nomeToLowerCase);

}

public String getUsers() {
    return getString(ParseIdentifier.usersFeedField);
}

public void setUsers(String users) {
    put(ParseIdentifier.usersFeedField, users);
}

public int getTotalLikes() {
    return getInt(ParseIdentifier.totalLikesFeedField);
}
public void setTotalLikes(int totalLikes) {
    put(ParseIdentifier.totalLikesFeedField, totalLikes);
}

public int getgetRankPosition() {
    return getInt(ParseIdentifier.rankPosition);
}
public void setRankPosition(int rankPosition) {
    put(ParseIdentifier.rankPosition, rankPosition);
}

public int getTotalFollowers() {
    return getInt(ParseIdentifier.totalFollowersFeedField);
}

public void setTotalFollowers(int totalFollowers) {
    put(ParseIdentifier.totalFollowersFeedField, totalFollowers);
}

public ParseACL getAcl() {
    return getACL();
}

public void setAcl(ParseACL acl) {
    setACL(acl);
}

public String getUserId() {
    return getString(ParseIdentifier.userIdFeedField);
}

public void setUserId(String userId) {
    put(ParseIdentifier.userIdFeedField, userId);
}

public Date getCreatedAt() {
    return getCreatedAt();
}

public void setCreatedAt(Date date) {
    setCreatedAt(date);
}

public String getUrlFeed() {
    return getString(ParseIdentifier.urlFeedFeedField);
}

public void setUrlFeed(String urlFeed) {
    put(ParseIdentifier.urlFeedFeedField, urlFeed);
}

public ParseUser getCreatedBy() {
    return getParseUser(ParseIdentifier.createdByField);
}

public void setCreatedBy(ParseUser user) {
    put(ParseIdentifier.createdByField, user);
}
}

您可以在此处查看如何查看这些对象：此图像引用objOwnFeeds

我也有。

ParseObject.registerSubclass(objFeed.class);
ParseObject.registerSubclass(objOwnFeeds.class);

这是我的查询：

ParseQuery query = new ParseQuery(objOwnFeeds.class);
query.include("Feed");
query.findInBackground(new FindCallback<objOwnFeeds>() {
    @Override
    public void done(List<objOwnFeeds> objects, ParseException e) {
        if (e == null){

            for (objOwnFeeds obj : objects) {
                Log.i("xxxzdae", "done: " + obj.getFeed().getObjectId());

            }
        }
    }

});

但是getFeed（）总是返回null。 感谢您的关注。

Answer 1

public objFeed getFeed() { return ParseObject.createWithoutData(objFeed.class, getParseObject(ParseIdentifier.getFeed()).getObjectId(); }

在object.fetchIfNeeded()检索任何数据之前，不要忘记调用object.fetchIfNeeded() 。