queryover and (x like 'a' or y like 'a')

Question

Hi Is there any elegant way of combining 'like' and 'or' when i'm using queryover API? for 'like' there is something like:

 query.WhereRestrictionOn(x=>x.Code).IsLike(codePart) 

for 'or' i can do something like:

query.Where( x=>x.Code == codePart || x.Description== codePart) 

but how can I create a query like this:

select * from n where code like '%abc%' or description like '%abc%'

Answer 1

You could use the NHibernate Disjunction class to do this in a more elegant (IMHO) fashion:

var disjunction= new Disjunction();  disjunction.Add(Restrictions.On<Type>(e => e.Code).IsLike(codePart)); disjunction.Add(Restrictions.On<Type>(e => e.Description).IsLike(codePart)); //(and so on) 

and then:

query.Where(disjunction) 

Each "OR" is a separate instruction, which helps if you want to add the predicates conditionally.