Class: ActiveFacts::Metamodel::SurrogateKey

Inherits:
Injection show all
Defined in:
lib/activefacts/metamodel/metamodel.rb,
lib/activefacts/metamodel/extensions.rb

Constant Summary

Constants inherited from Component

Component::RANK_DISCRIMINATOR, Component::RANK_FOREIGN, Component::RANK_IDENT, Component::RANK_INDICATOR, Component::RANK_INJECTION, Component::RANK_MANDATORY, Component::RANK_MULTIPLE, Component::RANK_NON_MANDATORY, Component::RANK_SCOPING, Component::RANK_SUBTYPE, Component::RANK_SUPER, Component::RANK_SURROGATE, Component::RANK_VALUE

Instance Method Summary collapse

Methods inherited from Component

#all_role, #data_type, #depth, #fork_to_new_parent, #in_foreign_key, #in_natural_index, #in_primary_index, #is_in_primary, #is_mandatory, #leaves, #narrow_value_constraint, #parent_entity_type, #path, #path_mandatory, #primary_index_components, #rank_key, #rank_kind, #rank_path, #root, #uncache_rank_key

Instance Method Details

#comment ⇒ Object 



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# File 'lib/activefacts/metamodel/extensions.rb', line 2291

def comment
  if parent && (c = parent.comment) != ''
    return c
  end
  if fkf = all_foreign_key_field.single
    return fkf.foreign_key.composite.mapping.name + ' surrogate key'
  end
  (parent ? parent.name + ' ' : '') + 'surrogate key'
end

#inspect ⇒ Object 



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# File 'lib/activefacts/metamodel/extensions.rb', line 2301

def inspect
  "#{self.class.basename} (#{rank_kind})#{parent ? " in #{parent.name}" :''} of #{name && name != '' ? name : '<anonymous>'}"
end

#is_auto_assigned ⇒ Object 



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# File 'lib/activefacts/metamodel/extensions.rb', line 2284

def is_auto_assigned
  # It's auto-assigned if it's in its root's primary_index and is not a foreign key field
  root and
    (root.primary_index.all_index_field.detect{|ixf| ixf.component == self}) and
    (!all_foreign_key_field.detect{|fkf| fkf.foreign_key.source_composite == self.root})
end

#is_identifying ⇒ Object 



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# File 'lib/activefacts/metamodel/extensions.rb', line 2277

def is_identifying
  if pk = root.primary_index
    return pk.all_index_field.detect{|ixf| ixf.component == self}
  end
  !parent.parent
end

#show_trace ⇒ Object 



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# File 'lib/activefacts/metamodel/extensions.rb', line 2305

def show_trace
  trace :composition, "#{ordinal ? "#{ordinal}: " : ''}#{inspect}"
end