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Contents
module Neo4j
module Schema
class Operation
attr_reader :label_name, :property, :options
def initialize(label_name, property, options = default_options)
@label_name = label_name.to_sym
@property = property.to_sym
@options = options
end
def self.incompatible_operation_classes
[]
end
def create!
drop_incompatible!
return if exist?
label_object.send(:"create_#{type}", property, options)
end
def label_object
@label_object ||= Neo4j::Label.create(label_name)
end
def incompatible_operation_classes
self.class.incompatible_operation_classes
end
def drop!
label_object.send(:"drop_#{type}", property, options)
end
def drop_incompatible!
incompatible_operation_classes.each do |clazz|
operation = clazz.new(label_name, property)
operation.drop! if operation.exist?
end
end
def exist?
fail 'Abstract class, not implemented'
end
def default_options
{}
end
def type
fail 'Abstract class, not implemented'
end
end
class ExactIndexOperation < Neo4j::Schema::Operation
def self.incompatible_operation_classes
[UniqueConstraintOperation]
end
def type
'index'
end
def exist?
label_object.indexes[:property_keys].include?([property])
end
end
class UniqueConstraintOperation < Neo4j::Schema::Operation
def self.incompatible_operation_classes
[ExactIndexOperation]
end
def type
'constraint'
end
def create!
return if exist?
super
end
def exist?
Neo4j::Label.constraint?(label_name, property)
end
def default_options
{type: :unique}
end
end
end
end
Version data entries
72 entries across 72 versions & 2 rubygems