Wie Objekte nach Attributen sortiert werden?

Question

Ich stehe seit einiger Zeit vor diesem Problem, bitte schauen Sie es sich an.

object.inspect gibt mir diese Ausgabe

<RawMaterial id: nil, name: "Jam Button 9 mm Antique Silver", rate: 1.0, raw_material_wastage: 0.0, total_raw_material: 8.0, slug: nil, costing_id: nil, created_at: nil, updated_at: nil, inventory_item_id: 758, costing_wastage: 0.0, pick_from_order_sheet: false> 

Erhöhung object.to_yaml dieser Ausgang

-- !ruby/object:RawMaterial 
raw_attributes: 
    costing_id: 
    id: 
    name: Jam Button 9 mm Antique Silver 
    rate: '1' 
    raw_material_wastage: '0' 
    total_raw_material: '8' 
    slug: 
    created_at: 
    updated_at: 
    inventory_item_id: '758' 
    costing_wastage: '0' 
    pick_from_order_sheet: f 
attributes: !ruby/object:ActiveRecord::AttributeSet 
    attributes: !ruby/object:ActiveRecord::LazyAttributeHash 
    types: 
     id: &3 !ruby/object:ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Integer 
     precision: 
     scale: 
     limit: 
     range: !ruby/range 
      begin: -2147483648 
      end: 2147483648 
      excl: true 
     name: &2 !ruby/object:ActiveRecord::Type::String 
     precision: 
     scale: 
     limit: 255 
     rate: &1 !ruby/object:ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Float 
     precision: 
     scale: 
     limit: 
     raw_material_wastage: *1 
     total_raw_material: *1 
     slug: *2 
     costing_id: *3 
     created_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter 
     subtype: &4 !ruby/object:ActiveRecord::ConnectionAdapters::PostgreSQL::OID::DateTime 
      precision: 
      scale: 
      limit: 
     updated_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter 
     subtype: *4 
     inventory_item_id: *3 
     costing_wastage: *1 
     pick_from_order_sheet: &5 !ruby/object:ActiveRecord::Type::Boolean 
     precision: 
     scale: 
     limit: 
    values: 
     id: '70' 
     name: Jam Button 9 mm Antique Silver 
     rate: '1' 
     raw_material_wastage: '0' 
     total_raw_material: '8' 
     slug: 
     costing_id: '34' 
     created_at: '2015-06-10 09:12:13.721016' 
     updated_at: '2015-06-10 09:12:14.075739' 
     inventory_item_id: '758' 
     costing_wastage: '0' 
     pick_from_order_sheet: f 
    additional_types: {} 
    materialized: true 
    delegate_hash: 
     costing_id: !ruby/object:ActiveRecord::Attribute::FromUser 
     name: costing_id 
     value_before_type_cast: 
     type: *3 
     value: 
     id: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: id 
     value_before_type_cast: 
     type: *3 
     value: 
     name: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: name 
     value_before_type_cast: Jam Button 9 mm Antique Silver 
     type: *2 
     value: Jam Button 9 mm Antique Silver 
     rate: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: rate 
     value_before_type_cast: '1' 
     type: *1 
     value: 1.0 
     raw_material_wastage: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: raw_material_wastage 
     value_before_type_cast: '0' 
     type: *1 
     value: 0.0 
     total_raw_material: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: total_raw_material 
     value_before_type_cast: '8' 
     type: *1 
     value: 8.0 
     slug: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: slug 
     value_before_type_cast: 
     type: *2 
     value: 
     created_at: !ruby/object:ActiveRecord::Attribute::FromUser 
     name: created_at 
     value_before_type_cast: 
     type: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter 
      subtype: *4 
     value: 
     updated_at: !ruby/object:ActiveRecord::Attribute::FromUser 
     name: updated_at 
     value_before_type_cast: 
     type: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter 
      subtype: *4 
     value: 
     inventory_item_id: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: inventory_item_id 
     value_before_type_cast: '758' 
     type: *3 
     value: 758 
     costing_wastage: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: costing_wastage 
     value_before_type_cast: '0' 
     type: *1 
     value: 0.0 
     pick_from_order_sheet: !ruby/object:ActiveRecord::Attribute::FromDatabase 
     name: pick_from_order_sheet 
     value_before_type_cast: f 
     type: *5 
     value: false 
new_record: true 

I von created_at Wert bestellen möchten gibt, die ich immer bin, wenn raise object.to_yaml tun, wie kann das sein erledigt ?

Answer 1

Wenn ich richtig verstehe, haben Sie eine Liste von Objekten des Typs RawMaterial. Sie können die Liste mit dem für jedes Objekt eindeutigen Objektfeld ['attributes']['attributes']['values']['created_at'] und der Methode Enumerable.sort_by sortieren.

enumerable_of_raw_materials.sort_by { |raw_material| 
    raw_material['attributes']['attributes']['values']['created_at'] 
}