Class: Holistic::Database

Inherits:
Object
  • Object
show all
Defined in:
lib/holistic/database.rb

Defined Under Namespace

Modules: Migrations Classes: Node, Relation

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Database

Returns a new instance of Database.



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# File 'lib/holistic/database.rb', line 6

def initialize
  @records = ::Hash.new
  @relations = ::Hash.new
end

Instance Attribute Details

#records ⇒ Object (readonly)

Returns the value of attribute records.



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# File 'lib/holistic/database.rb', line 4

def records
  @records
end

#relations ⇒ Object (readonly)

Returns the value of attribute relations.



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# File 'lib/holistic/database.rb', line 4

def relations
  @relations
end

Instance Method Details

#define_relation(name:, inverse_of:) ⇒ Object

Raises:

  • (::ArgumentError) 


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# File 'lib/holistic/database.rb', line 11

def define_relation(name:, inverse_of:)
  raise ::ArgumentError if @relations.key?(name) || @relations.key?(inverse_of)

  @relations[name] = { inverse_of: }
  @relations[inverse_of] = { inverse_of: name }
end

#delete(id) ⇒ Object 



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# File 'lib/holistic/database.rb', line 44

def delete(id)
  records.delete(id)
end

#find(id) ⇒ Object 



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# File 'lib/holistic/database.rb', line 40

def find(id)
  @records[id]
end

#store(id, node_or_attrs) ⇒ Object 



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# File 'lib/holistic/database.rb', line 18

def store(id, node_or_attrs)
  if @records.key?(id)
    return @records[id]&.tap do |node|
      node.attributes =
        case node_or_attrs
        in ::Hash then node_or_attrs
        in Node   then node_or_attrs.attributes
        end
    end
  end

  node =
    case node_or_attrs
    in ::Hash then Node.new(id, node_or_attrs)
    in Node   then node_or_attrs
    end

  node.__database__ = self

  @records[id] = node
end