49 lines
1.3 KiB
Ruby
49 lines
1.3 KiB
Ruby
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class Datatable
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delegate :params, to: :@view
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def initialize(view, collection, search_columns, sort_columns)
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@view = view
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@collection = collection
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@search_columns = search_columns
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@sort_columns = sort_columns
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end
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def as_json(options={})
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{
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sEcho: params[:sEcho].to_i,
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iTotalRecords: @collection.count,
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iTotalDisplayRecords: records.count,
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aaData: options[:data]
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}
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end
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def paginated_records
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paginate(records)
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end
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private
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def records
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@records ||= fetch_records
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end
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def fetch_records
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sort_direction = params[:sSortDir_0] == 'desc' ? 'desc' : 'asc'
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sort_column = @sort_columns[params[:iSortCol_0].to_i]
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records = @collection.order("#{sort_column} #{sort_direction}")
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if params[:sSearch].present? && @search_columns.present?
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search_query = ''
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@search_columns.each { |column| search_query += "#{column} like :search or " }
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search_query = search_query.chomp(' or ')
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records = records.where(search_query, search: "%#{params[:sSearch]}%")
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end
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records
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end
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def paginate(records)
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per_page = params[:iDisplayLength].to_i > 0 ? params[:iDisplayLength].to_i : 10
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page = params[:iDisplayStart].to_i / per_page + 1
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records.offset((page - 1) * per_page).limit(per_page)
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end
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end
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