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Contents
module Lanes::Concerns
# @see ClassMethods
module SortingExpressions
extend ActiveSupport::Concern
module ClassMethods
# Add a proc that will be called to add a sort expression to a query.
# The proc should accept an arel query object and a single direction parameter,
# which will be a symbol value of :asc or :desc
# It must return a arel query with the sort applied
# @param name [String] The name of the expression
def export_sort( name, &block )
@sorting_expressions ||= {}
@sorting_expressions[name.to_s] = block
end
def has_sorting_expression?(name)
@sorting_expressions && @sorting_expressions[name]
end
def append_sort_to_query(query, field, dir)
dir = :asc unless dir == :desc
if @sorting_expressions && (block = @sorting_expressions[field])
block.call(query, dir)
else
query.order(field.gsub(/[^\w|^\.]/,'') + ' ' +
( ( :asc == dir ) ? 'ASC' : 'DESC' ) )
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems