Class: ArelExtensions::Nodes::Cast

Inherits:
Function
  • Object
show all
Defined in:
lib/arel_extensions/nodes/cast.rb

Constant Summary

Constants inherited from Function

Function::RETURN_TYPE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Function

#as, #convert_to_date_node, #convert_to_datetime_node, #convert_to_node, #convert_to_number, #convert_to_string_node, #expr, #left, #right, #type_of_attribute

Methods included from Predications

#cast, #convert_to_node, #imatches, #in, #matches, #not_in, #when

Constructor Details

#initialize(expr) ⇒ Cast

Returns a new instance of Cast.



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# File 'lib/arel_extensions/nodes/cast.rb', line 8

def initialize expr 
	@as_attr = expr[1]
	case expr[1]
	when 'bigint', 'int', 'smallint', 'tinyint', 'bit'
		@return_type= :int
	when 'decimal', 'numeric', 'money', 'smallmoney', 'float', 'real'
		@return_type= :decimal
	when 'char', 'varchar', 'text', 'nchar', 'nvarchar', 'ntext'
		@return_type= :string
	when :int 
		@return_type= :number
	when :float, :decimal
		@return_type= :decimal
	when :datetime, 'datetime','smalldatetime'
		@return_type= :datetime
	when :time,'time'
		@return_type= :time
	when :date,'date'
		@return_type= :date
	when :binary, 'binary', 'varbinary', 'image'
		@return_type= :binary
	else
		@return_type= :string
		@as_attr = :string
	end
	tab = [convert_to_node(expr.first)]
	return super(tab)
end

Instance Attribute Details

#as_attr ⇒ Object

Returns the value of attribute as_attr.



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# File 'lib/arel_extensions/nodes/cast.rb', line 6

def as_attr
  @as_attr
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/arel_extensions/nodes/cast.rb', line 37

def +(other)
	case @return_type
	when :string
		return ArelExtensions::Nodes::Concat.new [self, other]
	when :ruby_time
		ArelExtensions::Nodes::DateAdd.new [self, other]
	else
		Arel::Nodes::Grouping.new(Arel::Nodes::Addition.new self, other)
	end
end

#return_type ⇒ Object 



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# File 'lib/arel_extensions/nodes/cast.rb', line 48

def return_type
	@return_type
end