Question

I have 3 related models:

class Transaction
  include DataMapper::Resource    
  property :id, Serial     
  property :volume, Float
  property :deal_date, Date  
  belongs_to :buyer
  belongs_to :seller
end

class Seller
  include DataMapper::Resource    
  property :id,         Serial
  property :name,   String      
  has n, :transactions
end

class Buyer
  include DataMapper::Resource    
  property :id, Serial
  property :name,   String, :length => 255, :index => true, :unique => true
  has n, :transactions
end

I want make a query to tranactions with some conditions:

x < volume < y
and
a < deal_date < b
and
( buyer.name like key_word OR seller.name like key_word )

How can I make OR condition between two LIKE with Datamapper?

Answer 1

Simply query Transaction, but with query-paths to buyer.name and seller.name.

Transaction.all('buyer.name.like' => keyword) | Transaction.all('seller.name.like' => keyword)