Class: Neo4j::Schema::Operation

Inherits:
Object
  • Object
show all
Defined in:
lib/neo4j/schema/operation.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(label_name, property, options = default_options) ⇒ Operation

Returns a new instance of Operation.



6
7
8
9
10
 
# File 'lib/neo4j/schema/operation.rb', line 6

def initialize(label_name, property, options = default_options)
  @label_name = label_name.to_sym
  @property = property.to_sym
  @options = options
end

Instance Attribute Details

#label_name ⇒ Object (readonly)

Returns the value of attribute label_name.



4
5
6
 
# File 'lib/neo4j/schema/operation.rb', line 4

def label_name
  @label_name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



4
5
6
 
# File 'lib/neo4j/schema/operation.rb', line 4

def options
  @options
end

#property ⇒ Object (readonly)

Returns the value of attribute property.



4
5
6
 
# File 'lib/neo4j/schema/operation.rb', line 4

def property
  @property
end

Class Method Details

.incompatible_operation_classes ⇒ Object 



12
13
14
 
# File 'lib/neo4j/schema/operation.rb', line 12

def self.incompatible_operation_classes
  []
end

Instance Method Details

#create! ⇒ Object 



16
17
18
19
20
 
# File 'lib/neo4j/schema/operation.rb', line 16

def create!
  drop_incompatible!
  return if exist?
  label_object.send(:"create_#{type}", property, options)
end

#default_options ⇒ Object 



45
46
47
 
# File 'lib/neo4j/schema/operation.rb', line 45

def default_options
  {}
end

#drop! ⇒ Object 



30
31
32
 
# File 'lib/neo4j/schema/operation.rb', line 30

def drop!
  label_object.send(:"drop_#{type}", property, options)
end

#drop_incompatible! ⇒ Object 



34
35
36
37
38
39
 
# File 'lib/neo4j/schema/operation.rb', line 34

def drop_incompatible!
  incompatible_operation_classes.each do |clazz|
    operation = clazz.new(label_name, property)
    operation.drop! if operation.exist?
  end
end

#exist? ⇒ Boolean

Returns:

  • (Boolean) 


41
42
43
 
# File 'lib/neo4j/schema/operation.rb', line 41

def exist?
  fail 'Abstract class, not implemented'
end

#incompatible_operation_classes ⇒ Object 



26
27
28
 
# File 'lib/neo4j/schema/operation.rb', line 26

def incompatible_operation_classes
  self.class.incompatible_operation_classes
end

#label_object ⇒ Object 



22
23
24
 
# File 'lib/neo4j/schema/operation.rb', line 22

def label_object
  @label_object ||= Neo4j::Label.create(label_name)
end

#type ⇒ Object 



49
50
51
 
# File 'lib/neo4j/schema/operation.rb', line 49

def type
  fail 'Abstract class, not implemented'
end