Is there any way to do cleanly in Arel and/or ActiveRecord::Relation, the following:
1. A *complex* OR clause I am aware of: t = A.arel_table (A === model, "as" = table) A.where(t[:colum1].lt(x).or(t[:column2].gt(y)).to_a
but am looking for a case where I want to write something more complex (multiple tables) like:
some relation: r1 = A.includes(:lots of stuff).where(...).where(....).where(...).... r2 = A.includes(:lots of stuff).where(...).where(...)
and I want r1.or.r2 , or, written: r1 | r2 ...
exactly like r1.merge(r2) or r1 & r2 for an AND chain...
2. Doing a group clause on, for example, r2 above, where the grouping is done by a specific column (e.g. :item), but the item column comes from *r1*, not *r2*, and is linked together using another column (e.g. :position).
That is, something like (writing pseudo Arel-like code): r2.includes(r1.results as special_chain).where("special_chain.position == as.position).group("special_chain.item").sum
... is that possible/close?
Thanks.
