stackoverflow tags and related tags
- by parminder
Hi Experts,
I am working on a website where a user can add tags to their posted books. It is similar to stackover flow, but I am keeping my tags in differnt table.
so here are the tables/class in linq to entities.
Books
{
bookId,
Title
}
Tags
{
Id
Tag
}
BooksTags
{
Id
BookId
TagId
}
Here are few sample records.
Books
BookId Title
113421 A
113422 B
Tags
Id Tag
1 ASP
2 C#
3 CSS
4 VB
5 VB.NET
6 PHP
7 java
8 pascal
BooksTags
Id BookId TagId
1 113421 1
2 113421 2
3 113421 3
4 113421 4
5 113422 1
6 113422 4
7 113422 8
Question 1 : I need to write something in linq to entities queries which gives me data according to the tags say if I want bookIds where tagid =1 it should return bookid 113421 and 113422 as it exists in both the books, but If I ask data for tags 1 and 2 it should return only book 113421 as that is the only book where both the tags are present.
Question 2 : I need tags and their count too to show in related tags, so in first case
my related tags class should have following result.
RelatedTags
Tag Count
2 1
3 1
4 2
8 1
in the second case when two tags are requested
the result should be like
RelatedTags
Tag Count
3 1
4 1
I have get the first thing working by converting a sql query in linqer, but that seems like a hell. so want to know if there is any better idea. I have used dyanmic where clause to include two tags. So if someone can help. It will be much appreciated.
Thanks
Parminder
