class ActiveRecord::Relation
Public Instance Methods
cast_carrier_wave_uploader_url(attributes)
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● Support casting CarrierWave url
# File lib/pluck_all/models/active_record_extension.rb, line 88 def cast_carrier_wave_uploader_url(attributes) if defined?(CarrierWave) && klass.respond_to?(:uploaders) @pluck_all_cast_need_columns ||= nil @pluck_all_cast_klass ||= klass @pluck_all_uploaders ||= @pluck_all_cast_klass.uploaders.select{|key, _uploader| attributes.key?(key.to_s) } @pluck_all_uploaders.each do |key, _uploader| {}.tap do |hash| @pluck_all_cast_need_columns.each{|k| hash[k] = attributes[k] } if @pluck_all_cast_need_columns obj = @pluck_all_cast_klass.instantiate(hash) obj[key] = attributes[key_s = key.to_s] # https://github.com/carrierwaveuploader/carrierwave/blob/87c37b706c560de6d01816f9ebaa15ce1c51ed58/lib/carrierwave/mount.rb#L142 attributes[key_s] = obj.send(key) end end end return attributes end
cast_need_columns(column_names, _klass = nil)
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# File lib/pluck_all/models/active_record_extension.rb, line 7 def cast_need_columns(column_names, _klass = nil) @pluck_all_cast_need_columns = column_names.map(&:to_s) @pluck_all_cast_klass = _klass return self end
pluck_all(*column_names, cast_uploader_url: true)
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# File lib/pluck_all/models/active_record_extension.rb, line 29 def pluck_all(*column_names, cast_uploader_url: true) result = select_all(column_names) result.map! do |attributes| # This map! behaves different to array#map! initialized_attributes = klass.initialize_attributes(attributes) attributes.each do |key, _attribute| attributes[key] = klass.type_cast_attribute(key, initialized_attributes) # TODO: 現在AS過後的type cast會有一點問題 end cast_carrier_wave_uploader_url(attributes) if cast_uploader_url next attributes end end
pluck_array(*args)
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# File lib/pluck_all/models/active_record_extension.rb, line 109 def pluck_array(*args) return pluck_all(*args, cast_uploader_url: false).map do |hash| result = hash.values # P.S. 這裡是相信ruby 1.9以後,hash.values的順序跟insert的順序一樣。 next (args.one? ? result.first : result) end end
select_all(column_names)
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# File lib/pluck_all/models/active_record_extension.rb, line 13 def select_all(column_names) relation = clone # See: https://github.com/globalize/globalize/pull/707 if relation.klass.method_defined?(:translated_attribute_names) && (parsed = parse_translated_columns(column_names)) relation = relation.join_translations column_names = parsed end relation.select_values = [].freeze # cannot use `unscope(:select)` in Rails 3 sql = relation.select(column_names.map(&to_sql_column_name)).to_sql return klass.connection.select_all(sql) end
to_sql_column_name()
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# File lib/pluck_all/models/active_record_extension.rb, line 43 def to_sql_column_name proc do |column_name| if column_name.is_a?(Arel::Attributes::Attribute) "#{column_name.relation.name}.#{column_name.name}" elsif column_name.is_a?(Symbol) && column_names.include?(column_name.to_s) "#{connection.quote_table_name(table_name)}.#{connection.quote_column_name(column_name)}" else column_name.to_s end end end