ruby - Rails: Group result set by combination of multiple columns -

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i have table called negotiations this

id    seller_id  buyer_id property_id 1        4           190      33123 2        4           190      33123 3        5           191      34000 4        5           191      34000 5        6           200      35000

i can fetch doing negotiation.all

i want fetch everything, grouped seller_id-buyer_id-property_id combination. in above example want return 3 groups.

is possible in rails application?

you can use enumerable#group_by :

negotiation.all.group_by{|x| [x.seller_id, x.buyer_id, x.property_id]}

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