Module: DynamoRecord::Persistence::ClassMethods

Defined in:
lib/dynamo_record/persistence.rb

Instance Method Summary collapse

Instance Method Details

#client ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 11

def client
  @client ||= Aws::DynamoDB::Client.new(
                access_key_id: DynamoRecord::Config.access_key_id,
                secret_access_key: DynamoRecord::Config.secret_access_key,
                region: DynamoRecord::Config.region,
                compute_checksums: DynamoRecord::Config.compute_checksums
              )
end

#create(attrs) ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 82

def create(attrs)
  object = self.new(attrs)
  object.save
  object
end

#create_table(opts = {}) ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 28

def create_table(opts = {})
  table_name = opts[:table_name] || self.table_name
  read_capacity = opts[:read_capacity] || DynamoRecord::Config.read_capacity_units
  write_capacity = opts[:write_capacity] || DynamoRecord::Config.write_capacity_units

  attribute_definitions = []
  key_schema = []

  # Default id hash key
  attribute_definitions << {attribute_name: 'id', 
                            attribute_type: 'S'}
  key_schema << {attribute_name: 'id',
                  key_type: "HASH"}

  if range_key
    attribute_definitions << {attribute_name: range_key.to_s, 
                              attribute_type: dynamodb_type(attributes[range_key][:type])}
    key_schema << {attribute_name: range_key.to_s,
                    key_type: "RANGE"}
  end

  # Local secondary indexes
  indexes = []
  attributes.each do |key, value|
    indexes << key if value[:options][:index]
  end

  local_secondary_indexes = []
  indexes.each do |index|
    index_definition = {}
    index_definition[:index_name] = "#{index}-index"
    index_definition[:key_schema] = [{ attribute_name: 'id', key_type: 'HASH' },
                                     { attribute_name: index, key_type: 'RANGE' }]
    index_definition[:projection] = { projection_type: 'ALL'}
    local_secondary_indexes << index_definition
    attribute_definitions << {attribute_name: index.to_s, 
                              attribute_type: dynamodb_type(attributes[index][:type])}
  end

  options = {
    attribute_definitions: attribute_definitions,
    table_name: table_name,
    key_schema: key_schema,
    provisioned_throughput: {
      read_capacity_units: read_capacity,
      write_capacity_units: write_capacity,
    }
  }

  options.merge!(local_secondary_indexes: local_secondary_indexes) unless local_secondary_indexes.empty?

  response = self.client.create_table(options)
end

#default_options ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 20

def default_options
  { table_name: self.table_name }
end

#describe_table ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 24

def describe_table
  self.client.describe_table(default_options)
end

#table_name ⇒ Object 



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# File 'lib/dynamo_record/persistence.rb', line 6

def table_name
  name = ActiveSupport::Inflector.tableize(base_class.name)
  @table_name ||= DynamoRecord::Config.namespace ? "#{DynamoRecord::Config.namespace}_#{name}" : name
end