func (ls *LevelDBStore) GetSlice(limit int64, offset int64) (posts []*postmi.Post, e error) {
iter := ls.db.NewIterator(util.BytesPrefix([]byte("p")), nil)
iter.Last()
var p *postmi.Post
p, e = postmi.NewPostFromJSON(iter.Value())
if e != nil {
return
}
posts = append(posts, p)
for iter.Prev() {
offset--
if offset > 0 {
continue
}
p, e = postmi.NewPostFromJSON(iter.Value())
if e != nil {
break
}
posts = append(posts, p)
if int64(len(posts)) == limit {
break
}
}
iter.Release()
if e != nil {
return
}
e = iter.Error()
return
}
func (ls *LevelDBStore) Get(id int64) (*postmi.Post, error) {
bts, e := ls.db.Get(idKey(id), nil)
if e != nil {
return nil, e
}
return postmi.NewPostFromJSON(bts)
}