Class: Neo4j::Cypher::RootClause

Inherits:
Object
  • Object
show all
Includes:
Clause
Defined in:
lib/neo4j-cypher/root.rb

Defined Under Namespace

Classes: EvalContext

Constant Summary

Constants included from Clause

Clause::NAME, Clause::ORDER

Instance Attribute Summary

Attributes included from Clause

#clause_list, #clause_type, #eval_context, #expr, #insert_order

Instance Method Summary collapse

Methods included from Clause

#<=>, #alias_name, #as_alias, #as_alias?, #clause_position, #create_clause_args_for, #match_value, #match_value=, #prefix, #referenced!, #referenced?, #separator, #to_prop_string, #valid_clause?, #var_name, #var_name=

Constructor Details

#initialize ⇒ RootClause

Returns a new instance of RootClause.



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# File 'lib/neo4j-cypher/root.rb', line 6

def initialize
  super(ClauseList.new, :root, EvalContext)
end

Instance Method Details

#create_returns(last_result) ⇒ Object 



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# File 'lib/neo4j-cypher/root.rb', line 23

def create_returns(last_result)
  if last_result.is_a?(Array)
    eval_context.ret(*last_result)
  elsif last_result.nil?
    eval_context.ret(clause_list.last.eval_context) unless clause_list.empty?
  else
    eval_context.ret(last_result)
  end
end

#execute(args, &cypher_dsl) ⇒ Object 



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# File 'lib/neo4j-cypher/root.rb', line 10

def execute(args, &cypher_dsl)
  result = eval_context.instance_exec(*args, &cypher_dsl)

  if ![Array, Symbol].include?(result.class)
    return if clause_list.include?(:return)
    return if clause_list.include?(:with)
    return if clause_list.include?(:delete)
    return if clause_list.include?(:set)
    return if clause_list.include?(:remove)
  end
  create_returns(result)
end

#return_names ⇒ Object 



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# File 'lib/neo4j-cypher/root.rb', line 37

def return_names
  ret = clause_list.return_clause
  ret ? ret.return_items.map { |ri| (ri.alias_name || ri.return_value).to_sym } : []
end

#return_value ⇒ Object 



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# File 'lib/neo4j-cypher/root.rb', line 33

def return_value
  clause_list.to_cypher
end