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 Injection

#path_mandatory

Methods inherited from Mapping

#all_leaf, #inspect, #is_mandatory, #path_mandatory, #re_rank, #root, #show_trace, #validate_members

Methods inherited from Component

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

Instance Method Details

#comment ⇒ Object 



2248
2249
2250
2251
2252
2253
2254
2255
2256
 
# File 'lib/activefacts/metamodel/extensions.rb', line 2248

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

#is_auto_assigned ⇒ Object 



2241
2242
2243
2244
2245
2246
 
# File 'lib/activefacts/metamodel/extensions.rb', line 2241

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 



2234
2235
2236
2237
2238
2239
 
# File 'lib/activefacts/metamodel/extensions.rb', line 2234

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