Class: RightAws::ActiveSdb::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/broham/sdb/active_sdb.rb

Direct Known Subclasses

Broham, BrohamNode

Instance Method Summary collapse

Instance Method Details

#save(expected_attributes = { }) ⇒ Object

Store in-memory attributes to SDB. Replaces the attributes values already stored at SDB by in-memory data. Returns a hash of stored attributes.

sandy = Client.new(:name => 'Sandy')  #=> #<Client:0xb775a7a8 @attributes={"name"=>["Sandy"]}, @new_record=true>
sandy['toys'] = 'boys'
sandy.put
sandy['toys'] = 'patchwork'
sandy.put
sandy['toys'] = 'kids'
sandy.put
puts sandy.attributes.inspect         #=> {"name"=>["Sandy"], "id"=>"b2832ce2-e461-11dc-b13c-001bfc466dd7", "toys"=>["kids"]}
sandy.reload                          #=> {"name"=>["Sandy"], "id"=>"b2832ce2-e461-11dc-b13c-001bfc466dd7", "toys"=>["kids"]}

compare to put method



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# File 'lib/broham/sdb/active_sdb.rb', line 18

def save expected_attributes={ }
  @attributes = uniq_values(@attributes)
  prepare_for_update
  connection.put_attributes(domain, id, @attributes, :replace, expected_attributes)
  mark_as_old
  @attributes
end

#save_attributes(attrs, expected_attributes = {}) ⇒ Object

Replaces the attributes at SDB by the given values. Attrs is a hash: { attribute1 => values1, …, attributeN => valuesN }. The other in-memory attributes are not being saved. Returns a hash of stored attributes.

see save method



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# File 'lib/broham/sdb/active_sdb.rb', line 40

def save_attributes(attrs, expected_attributes={})
  prepare_for_update
  attrs = uniq_values(attrs)
  # if 'id' is present in attrs hash then replace internal 'id' attribute
  unless attrs['id'].blank?
    @attributes['id'] = attrs['id']
  else
    attrs['id'] = id
  end
  connection.put_attributes(domain, id, attrs, :replace, expected_attributes) unless attrs.blank?
  attrs.each { |attribute, values| attrs[attribute] = values }
  mark_as_old
  attrs
end

#save_if(expected_attributes = { }) ⇒ Object 



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# File 'lib/broham/sdb/active_sdb.rb', line 26

def save_if expected_attributes={ }
  begin
    save expected_attributes
  rescue RightAws::AwsError => e
    false
  end
end