在我的社交应用程序(如 FB)中,我有一个奇怪的需要,将同一集合用户的两个光标合并到一个发布中!
Meteor 服务器打印此错误:“发布函数为集合用户返回了多个游标”。
也许这在 Meteor 0.7.2 中无法完成,也许我的方法是错误的。
但我发现游标的结构非常简单,因为我可以进行简单的数组合并并返回游标?
CLIENT
Meteor.subscribe('friendById', friend._id, function() {
//here show my friend data and his friends
});
SERVER
//shared functions in lib(NOT EDITABLE)
getUsersByIds = function(usersIds) {
return Meteor.users.find({_id: {$in: usersIds} },
{
fields: { // limited fields(FRIEND OF FRIEND)
username: 1,
avatar_url: 1
}
});
};
getFriendById = function(userId) {
return Meteor.users.find(userId,
{
fields: { // full fields(ONLY FOR FRIENDS)
username: 1,
avatar_url: 1,
online: 1,
favorites: 1,
follow: 1,
friends: 1
}
});
};
Meteor.publish('friendById', function(userId) { //publish user data and his friends
if(this.userId && userId)
{
var userCur = getFriendById(userId),
userFriends = userCur.fetch()[0].friends,
retCurs = [];
//every return friend data
retCurs.push( userCur );
//if user has friends! returns them but with limited fields:
if(userFriends.length > 0)
retCurs.push( getUsersByIds(userFriends) );
//FIXME ERROR "Publish function returned multiple cursors for collection users"
return retCurs; //return one or more cursor
}
else
this.ready();
});