Here is my tag search idea:-
If I have 4 tags
Then I can save following strings combinations
tag1,tag2,tag3,tag4,
tag1,tag2,tag4,
tag1,tag3,tag4,
tag1,tag4
tag2,tag3,tag4,
tag2,tag4,
tag3,tag4,
tag4,
class TagLine{
@PrimaryKey
@Persistent
Long id;
@Key
@Persistent
String tags;
@Persistent
Long objectId;
}
If I have search "tag list" then I will "implode" tag list in a
string with comma as delimiter.
and search for tags (in TagLine) starting with that string
If I will have many tags that I will have to insert many TagLine
objects.
I estimate 2^(n-1) for n tags
So it is expensive feature and it is most efficient solution I have
found so far.
Sample search [tag3, tag2]
Sort: [tag2, tag3]
Implode into string "tag2,tag3,"
Object with this tags will have TagLine(s) starting with "tag2,tag3,"
In my sample data it is:- "tag2,tag3,tag4,"
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