Class: DbAgile::Core::Schema::Logical::Relvar

Inherits:
Composite show all
Defined in:
lib/dbagile/core/schema/logical/relvar.rb

Instance Attribute Summary collapse

Attributes inherited from SchemaObject

#parent, #status

Instance Method Summary collapse

Methods inherited from Composite

#[], #[]=, #dependencies, #each_part, #empty?, #part_keys, #parts, #size, #to_yaml, #visit, #yaml_display

Methods inherited from SchemaObject

#ancestors, #attribute?, #builder_handler, #candidate_key?, #composite?, #constraint?, #foreign_key?, #index?, #logical?, #outside_dependencies, #outside_dependents, #part?, #physical?, #primary_key?, #relation_variable, #relvar?, #relview?, #schema

Constructor Details

#initialize(name, parts = _default_parts) ⇒ Relvar

Creates a relation variable instance



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 11

def initialize(name, parts = _default_parts)
  @name = name.to_s.to_sym
  super(parts)
  @insert_order = [ :heading, :constraints ] & parts.keys
end

Instance Attribute Details

#name ⇒ Object (readonly)

Relvar name



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 8

def name
  @name
end

Instance Method Details

#_install_eigenclass_methods? ⇒ Boolean

Returns:

  • (Boolean)

See Also:

  • Composite#_install_eigenclass_methods?


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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 22

def _install_eigenclass_methods?
  true
end

#_sanity_check(schema) ⇒ Object

Makes a sanity check on the part

Raises:



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 33

def _sanity_check(schema)
  raise SchemaInternalError, "No name provided on #{self}" if name.nil?
  super(schema)
end

#_semantics_check(clazz, buffer) ⇒ Object

Checks this composite’s semantics and collects errors inside buffer



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 39

def _semantics_check(clazz, buffer)
  if constraints.primary_key.nil?
    buffer.add_error(self, clazz::MissingPrimaryKey)
  end
  super(clazz, buffer)
end

#builder_args ⇒ Object

Returns the arguments to pass to builder handler



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 51

def builder_args
  [ name ]
end

#dup ⇒ Object

Duplicates this attribute



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 67

def dup
  Logical::Relvar.new(name, :heading => heading.dup, :constraints => constraints.dup)
end

#look_same_as?(other) ⇒ Boolean

Compares with another attribute

Returns:

  • (Boolean) 


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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 60

def look_same_as?(other)
  return nil unless other.kind_of?(Relvar)
  return false unless name == other.name
  super(other)
end

#to_s ⇒ Object

Returns a string representation



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# File 'lib/dbagile/core/schema/logical/relvar.rb', line 72

def to_s
  "#{DbAgile::RubyTools::unqualified_class_name(self.class)}: #{name}"
end