I have two collections in firestore, 'users' and 'posts'. HomePage is where all the posts are displayed in a listview and every post has a 'like' button. I'm saving the liked posts in a set final _likedPosts = Set<Posts>();
on the page but it only temporarily saves the liked posts and it loses all that data once the app is closed. How can I save the user's _likedPosts permanently so that the data is retained. What query should I make for the users to retain the _likedPosts? or is there any other way for this?
This is how the Icon and onTap is currently,
final _likedPosts = _savedPosts.contains(post);
Icon(_likedPosts ? Icons.favorite : Icons.favorite_border,
color: _likedPosts ? Colors.red : null),
onTap: () {
setState(() {
if (_likedPosts) {
_savedPosts.remove(post);
} else {
_savedPosts.add(post);
}
});
}
Are you saving a liked post of a certain user? then I suggest getting that post(ID) and save it to an array in the users doc Liked-Posts per user. Because state doesn't persist or can't be saved unless you use an external db.
you have to create this item like class StatefulWidget
class MyLikeButton extends StatefulWidget { \\...
and after add to state class of this item add "with AutomaticKeepAliveClientMixin" like this:
class _MyLikeButtonState extends State<MyLikeButton> with AutomaticKeepAliveClientMixin {
@override
bool get wantKeepAlive => true; \\....
this will keep alive the changes in the item when scrolling, its that u want?
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