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module RocketJobMissionControl
class AbstractDatatable
delegate :params, :link_to, :render, to: :@view
delegate :h, to: 'ERB::Util'
attr_accessor :view, :query
def initialize(view, query)
@view = view
@query = query
extract_query_params
end
def as_json(options = {})
{
draw: params[:draw].to_i,
recordsTotal: query.unfiltered_count,
recordsFiltered: query.count,
data: query.query.collect { |record| map(record) }
}
end
private
def map(record)
raise NotImplementedError
end
def extract_query_params
# Search term
search = params[:search]
if search.present? && search[:value].present?
query.search_term = search[:value] if search.present?
end
# Sort order
if order_by = extract_sort(params[:order])
query.order_by = order_by
end
# Pagination
unless params[:length].present? && params[:length] == '-1'
query.start = params[:start].to_i
query.page_size = params.fetch(:length, 10).to_i
end
end
def extract_sort(order)
return nil unless order.present?
sort_by = {}
order.each_pair do |key, value|
name = query.display_columns[value[:column].to_i]
raise(ArgumentError, "Invalid column id: #{value[:column]}. Must fit #{query.display_columns.inspect}") unless name.present?
sort_by[name] = value[:dir]
end
sort_by
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems