fix looking up equal rows in cart
fix looking up equal rows in cart

doesn't work with whereEquals because it's a field model which we can't query using sql

yacon/koala-framework,darimpulso/koala-framework,nsams/koala-framework,kaufmo/koala-framework,fraxachun/koala-framework,koala-framework/koala-framework,Sogl/koala-framework,nsams/koala-framework,kaufmo/koala-framework,Ben-Ho/koala-framework,darimpulso/koala-framework,nsams/koala-framework,Sogl/koala-framework,yacon/koala-framework,fraxachun/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework,yacon/koala-framework,Ben-Ho/koala-framework