How about splitting where and filter to do different things?
Both these would be the same:
dataset.filter {|o| o.a > 1}
dataset.where {a > 1}
You can also refer to local variables in #where by passing them as
arguments:
price = 1
name = "hotdog"
# The following two statements result in the SQL: "price > 1 AND name
= 'hotdog'"
dataset.filter {|o| (o.price > price) & (o.name == name)}
dataset.where(price, name) {|p,n| (price > p) & (name > n)}
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