public static void AddHashTag(this Postcard postcard, string hashTag)
{
using (ApplicationDbContext db = new ApplicationDbContext())
{
postcard = db.Postcards.Single(p => p.Id == postcard.Id);
HashTag existingHashTag = db.HashTags.SingleOrDefault(h =>
h.Value == hashTag);
if (existingHashTag == null)
{
existingHashTag = new HashTag
{
Value = hashTag
};
HashTagSearcher.AddUpdateLuceneIndex(existingHashTag);
}
postcard.HashTags.Add(existingHashTag);
db.SaveChanges();
}
}
public static void AddUpdateLuceneIndex(HashTag hashTag)
{
AddUpdateLuceneIndex(new List<HashTag> { hashTag });
}
private static void AddToLuceneIndex(HashTag hashTag, IndexWriter writer)
{
var searchQuery = new TermQuery(new Term("Id", hashTag.Id.ToString()));
writer.DeleteDocuments(searchQuery);
var doc = new Document();
doc.Add(new Field("Id", hashTag.Id.ToString(), Field.Store.YES,
Field.Index.NOT_ANALYZED));
doc.Add(new Field("Value", hashTag.Value, Field.Store.YES,
Field.Index.ANALYZED));
writer.AddDocument(doc);
}
