class Groupdate::Magic::Relation
Public Class Methods
generate_relation(relation, field:, **options)
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# File lib/groupdate/magic.rb, line 189 def self.generate_relation(relation, field:, **options) magic = Groupdate::Magic::Relation.new(**options) adapter_name = relation.connection.adapter_name adapter = Groupdate.adapters[adapter_name] raise Groupdate::Error, "Connection adapter not supported: #{adapter_name}" unless adapter # generate ActiveRecord relation relation = adapter.new( relation, column: field, period: magic.period, time_zone: magic.time_zone, time_range: magic.time_range, week_start: magic.week_start, day_start: magic.day_start, n_seconds: magic.n_seconds ).generate # add Groupdate info magic.group_index = relation.group_values.size - 1 (relation.groupdate_values ||= []) << magic relation end
new(**options)
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Calls superclass method
Groupdate::Magic::new
# File lib/groupdate/magic.rb, line 122 def initialize(**options) super(**options.reject { |k, _| [:default_value, :carry_forward, :last, :current].include?(k) }) @options = options end
process_result(relation, result, **options)
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allow any options to keep flexible for future
# File lib/groupdate/magic.rb, line 217 def self.process_result(relation, result, **options) relation.groupdate_values.reverse.each do |gv| result = gv.perform(relation, result, default_value: options[:default_value]) end result end
Public Instance Methods
cast_method()
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# File lib/groupdate/magic.rb, line 141 def cast_method @cast_method ||= begin case period when :minute_of_hour, :hour_of_day, :day_of_month, :day_of_year, :month_of_year lambda { |k| k.to_i } when :day_of_week lambda { |k| (k.to_i - 1 - week_start) % 7 } else utc = ActiveSupport::TimeZone["UTC"] lambda { |k| (k.is_a?(String) || !k.respond_to?(:to_time) ? utc.parse(k.to_s) : k.to_time).in_time_zone(time_zone) } end end end
cast_result(result, multiple_groups)
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# File lib/groupdate/magic.rb, line 155 def cast_result(result, multiple_groups) new_result = {} result.each do |k, v| if multiple_groups k[group_index] = cast_method.call(k[group_index]) else k = cast_method.call(k) end new_result[k] = v end new_result end
check_nils(result, multiple_groups, relation)
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# File lib/groupdate/magic.rb, line 178 def check_nils(result, multiple_groups, relation) has_nils = multiple_groups ? (result.keys.first && result.keys.first[group_index].nil?) : result.key?(nil) if has_nils if time_zone_support?(relation) raise Groupdate::Error, "Invalid query - be sure to use a date or time column" else raise Groupdate::Error, "Database missing time zone support for #{time_zone.tzinfo.name} - see https://github.com/ankane/groupdate#for-mysql" end end end
perform(relation, result, default_value:)
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# File lib/groupdate/magic.rb, line 127 def perform(relation, result, default_value:) multiple_groups = relation.group_values.size > 1 check_nils(result, multiple_groups, relation) result = cast_result(result, multiple_groups) series_builder.generate( result, default_value: options.key?(:default_value) ? options[:default_value] : default_value, multiple_groups: multiple_groups, group_index: group_index ) end
time_zone_support?(relation)
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# File lib/groupdate/magic.rb, line 168 def time_zone_support?(relation) if relation.connection.adapter_name =~ /mysql/i # need to call klass for Rails < 5.2 sql = relation.klass.send(:sanitize_sql_array, ["SELECT CONVERT_TZ(NOW(), '+00:00', ?)", time_zone.tzinfo.name]) !relation.connection.select_all(sql).first.values.first.nil? else true end end