What is the 'rails way' to pass a parameter to the controller in a link -

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i'm trying pass variable view controller in link_to. link_to:

<%= link_to "download csv", vendor_skus_path(format: "csv") %>

i pass filter parameter, parameter set in view , not part of form. how can parameter controller use in model? how build filter parameter:

<%= select_tag "vendor-select", options_from_collection_for_select(@vendors, "id", "name"), include_blank: true, class:"vendor-select form-control" %>

in vendor_skus#index controller this:

respond_to |format|   format.html   format.csv { send_data @vendor_skus.to_csv } end

what below, can use parameter filter rows exported.

respond_to |format|   format.html   format.csv { send_data @vendor_skus.to_csv, vendor_id } end


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