Class: ArelExtensions::Nodes::Cast

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

Constant Summary

Constants inherited from Function

Function::MBSTRING, 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 :int, 'bigint', 'int', 'smallint', 'tinyint', 'bit'
    @return_type = :int
  when :float, :decimal, 'decimal', 'numeric', 'money', 'smallmoney', 'float', 'real'
    @return_type = :decimal
  when :number
    @return_type = :number
  when 'char', 'varchar', 'nchar', 'nvarchar'
    @return_type = :string
  when 'text', :text, 'ntext', :ntext
    @as_attr = expr[1].to_sym
    @return_type = :string
  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 38

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 49

def return_type
  @return_type
end