Class: Seeder

Inherits:
Object
  • Object
show all
Defined in:
lib/seeder.rb,
lib/seeder/version.rb

Constant Summary collapse

VERSION = 
'1.4.0'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, keys, model) ⇒ Seeder

Returns a new instance of Seeder.



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# File 'lib/seeder.rb', line 8

def initialize(data, keys, model)
  @keys = keys.map(&:to_sym)
  @data = data.map(&:symbolize_keys)
  @model = model
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/seeder.rb', line 2

def data
  @data
end

#keys ⇒ Object (readonly)

Returns the value of attribute keys.



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# File 'lib/seeder.rb', line 2

def keys
  @keys
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/seeder.rb', line 2

def model
  @model
end

Class Method Details

.create(data, keys, model) ⇒ Object 



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# File 'lib/seeder.rb', line 4

def self.create(data, keys, model)
  new(data, keys, model).create
end

Instance Method Details

#create ⇒ Object 



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# File 'lib/seeder.rb', line 14

def create
  model.transaction do
    delete_outdated_records
    update_existing_records
    create_new_records
  end
end

#create_new_records ⇒ Object 



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# File 'lib/seeder.rb', line 37

def create_new_records
  new_keys = data_keys_hash.keys - existing_records_keys_hash.keys

  data_keys_hash.values_at(*new_keys).each do |attributes|
    model.create!(attributes)
  end
end

#delete_outdated_records ⇒ Object 



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# File 'lib/seeder.rb', line 22

def delete_outdated_records
  return unless records_to_delete.present?
  model.where(id: records_to_delete).delete_all
end

#update_existing_records ⇒ Object 



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# File 'lib/seeder.rb', line 27

def update_existing_records
  existing_records_keys_hash.each do |record_keys, record|
    attributes = data_keys_hash[record_keys]
    next unless attributes

    record.attributes = attributes
    record.save! if record.changed?
  end
end