module Ancestry

@!default_ancestry_format

@return [Symbol] the default strategy for updating ancestry

The value changes the default way that ancestry is stored in the database

:materialized_path (default and legacy)

    Ancestry is of the form null (for no ancestors) and 1/2/ for children

:materialized_path2 (preferred)

    Ancestry is of the form '/' (for no ancestors) and '/1/2/' for children

# File lib/ancestry.rb, line 52
def self.default_ancestry_format
  @@default_ancestry_format
end

@!default_primary_key_format

@return [Symbol] the regular expression representing the primary key

The value represents the way the id looks for validation

'[0-9]+' (default) for integer ids
'[-A-Fa-f0-9]{36}'    for uuids (though you can find other regular expressions)

# File lib/ancestry.rb, line 67
def self.default_primary_key_format
  @@default_primary_key_format
end

@!default_update_strategy

@return [Symbol] the default strategy for updating ancestry

The value changes the default way that ancestry is updated for associated records

:ruby (default and legacy value)

    Child records will be loaded into memory and updated. callbacks will get called
    The callbacks of interest are those that cache values based upon the ancestry value

:sql (currently only valid in postgres)

    Child records are updated in sql and callbacks will not get called.
    Associated records in memory will have the wrong ancestry value

# File lib/ancestry.rb, line 32
def self.default_update_strategy
  @@default_update_strategy
end