Class: ActiveRecord::Refined::AST::Extract

Inherits:
Node
  • Object
show all
Includes:
Arithmetics, Predications
Defined in:
lib/active_record/refined/ast.rb

Overview

EXTRACT(field FROM expr). The field is grammar rather than a value -- a keyword the adapter reads bare -- so it has to be a plain name, which Arel upcases on the way out.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Arithmetics

#*, #+, #-, #/

Methods included from Predications

#!=, #!~, #<, #<=, #==, #=~, #>, #>=, #between?, #casecmp?, #distinct_from?, #end_with?, #ilike?, #in?, #include?, #intersect?, #like?, #member?, #not_between?, #not_distinct_from?, #not_ilike?, #not_in?, #not_like?, #not_null?, #null?, #start_with?, #subset?, #superset?

Methods inherited from Node

#as, #asc, #desc

Constructor Details

#initialize(field, operand) ⇒ Extract

Returns a new instance of Extract.



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# File 'lib/active_record/refined/ast.rb', line 427

def initialize(field, operand)
  @field = AST.check_name(field, ALIAS_NAME, "extract field")
  @operand = operand
end

Instance Attribute Details

#field ⇒ Object (readonly)

Returns the value of attribute field.



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# File 'lib/active_record/refined/ast.rb', line 425

def field
  @field
end

#operand ⇒ Object (readonly)

Returns the value of attribute operand.



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# File 'lib/active_record/refined/ast.rb', line 425

def operand
  @operand
end

Instance Method Details

#to_arel(table) ⇒ Object 



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# File 'lib/active_record/refined/ast.rb', line 432

def to_arel(table)
  Arel::Nodes::Extract.new(to_arel_argument(operand, table), field.to_s)
end