Module: Neo4j::ActiveRel::Persistence

Extended by:
ActiveSupport::Concern
Includes:
Shared::Cypher::RelIdentifiers, Shared::Persistence
Included in:
Neo4j::ActiveRel
Defined in:
lib/neo4j/active_rel/persistence.rb,
lib/neo4j/active_rel/persistence/query_factory.rb

Defined Under Namespace

Modules: ClassMethods Classes: ModelClassInvalidError, QueryFactory, RelCreateFailedError, RelInvalidError

Instance Method Summary collapse

Methods included from Shared::Persistence

#apply_default_values, #cache_key, #create_or_update, #destroy, #destroyed?, #exist?, #freeze, #frozen?, #increment, #increment!, #new_record?, #persisted?, #props, #props_for_create, #props_for_persistence, #props_for_update, #reload, #reload_from_database, #skip_update?, #touch, #update, #update!, #update_attribute, #update_attribute!, #update_db_properties, #update_db_property, #update_model

Instance Method Details

#concurrent_increment!(attribute, by = 1) ⇒ Object

Increments concurrently a numeric attribute by a centain amount

Parameters:

  • name (Symbol, String) —

    of the attribute to increment

  • amount (Integer, Float) —

    to increment



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# File 'lib/neo4j/active_rel/persistence.rb', line 42

def concurrent_increment!(attribute, by = 1)
  increment_by_query! query_as(:r), attribute, by, :r
end

#create_method ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 92

def create_method
  self.class.create_method
end

#create_model ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 46

def create_model
  validate_node_classes!
  validate_has_one_rel
  rel = _create_rel
  return self unless rel.respond_to?(:props)
  init_on_load(rel, from_node, to_node, @rel_type)
  true
end

#cypher_identifier ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 27

def cypher_identifier
  @cypher_identifier || :rel
end

#from_node_identifier ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 11

def from_node_identifier
  @from_node_identifier || :from_node
end

#from_node_identifier=(id) ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 19

def from_node_identifier=(id)
  @from_node_identifier = id.to_sym
end

#query_as(var) ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 61

def query_as(var)
  # This should query based on the nodes, not the rel neo_id, I think
  # Also, picky point: Should the var be `n`?
  self.class.query_as(neo_id, var)
end

#save ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 31

def save(*)
  create_or_update
end

#save!(*args) ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 35

def save!(*args)
  save(*args) or fail(RelInvalidError, inspect) # rubocop:disable Style/AndOr
end

#to_node_identifier ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 15

def to_node_identifier
  @to_node_identifier || :to_node
end

#to_node_identifier=(id) ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 23

def to_node_identifier=(id)
  @to_node_identifier = id.to_sym
end

#validate_has_one_rel ⇒ Object 



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# File 'lib/neo4j/active_rel/persistence.rb', line 55

def validate_has_one_rel
  return unless Neo4j::Config[:enforce_has_one]
  to_node.validate_reverse_has_one_active_rel(self, :in, from_node) if to_node.persisted?
  from_node.validate_reverse_has_one_active_rel(self, :out, to_node) if from_node.persisted?
end