Module: ArelExtensions::Predications

Included in:
Attributes, Nodes::Function
Defined in:
lib/arel_extensions/predications.rb

Instance Method Summary collapse

Instance Method Details

#cast(right) ⇒ Object 



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# File 'lib/arel_extensions/predications.rb', line 19

def cast right
  ArelExtensions::Nodes::Cast.new([self,right])
end

#convert_to_node(object) ⇒ Object 



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# File 'lib/arel_extensions/predications.rb', line 77

def convert_to_node(object)
  case object
  when Arel::Attributes::Attribute, Arel::Nodes::Node, Integer
    object
  when DateTime
    Arel::Nodes.build_quoted(object, self)
  when Time
    Arel::Nodes.build_quoted(object.strftime('%H:%M:%S'), self)
  when String
    Arel::Nodes.build_quoted(object)
  when Date
    Arel::Nodes.build_quoted(object.to_s, self)
  when NilClass
    Arel.sql('NULL')
  when ActiveSupport::Duration
    object.to_i
  else
    raise(ArgumentError, "#{object.class} can not be converted to CONCAT arg")
  end
end

#imatches(other, escape = nil) ⇒ Object 



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# File 'lib/arel_extensions/predications.rb', line 15

def imatches(other, escape=nil)
  ArelExtensions::Nodes::IMatches.new(self, other, escape)
end

#in(other) ⇒ Object

In should handle nil element in the Array



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# File 'lib/arel_extensions/predications.rb', line 23

def in(other) #In should handle nil element in the Array
  case other
  when Range
    self.between(other)
  when Enumerable
    if other.include?(nil)
      other.delete(nil)
      case other.length
      when 0
        self.is_null
      when 1
        self.is_null.or(self==other[0])
      else
        self.is_null.or(Arel::Nodes::In.new(self,quoted_array(other)))
      end
    else
      Arel::Nodes::In.new(self,quoted_array(other))
    end
  when nil
    self.is_null
  when Arel::SelectManager
    Arel::Nodes::In.new(self, other.ast)
  else
    Arel::Nodes::In.new(self,quoted_node(other))
  end
end

#matches(other, escape = nil, case_sensitive = nil) ⇒ Object 



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# File 'lib/arel_extensions/predications.rb', line 7

def matches(other, escape=nil,case_sensitive= nil)
  if Arel::VERSION.to_i < 7
    Arel::Nodes::Matches.new(self, Arel::Nodes.build_quoted(other), escape)
  else
    Arel::Nodes::Matches.new(self, Arel::Nodes.build_quoted(other), escape, case_sensitive)
  end
end

#not_in(other) ⇒ Object

In should handle nil element in the Array



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# File 'lib/arel_extensions/predications.rb', line 50

def not_in(other) #In should handle nil element in the Array
  case other
  when Range
    Arel::Nodes::Not.new(self.between(other))
  when Enumerable
    if other.include?(nil)
      other.delete(nil)
      case other.length
      when 0
        self.is_not_null
      when 1
        self.is_not_null.and(self!=other[0])
      else
        self.is_not_null.and(Arel::Nodes::NotIn.new(self,quoted_array(other)))
      end
    else
      Arel::Nodes::NotIn.new(self,quoted_array(other))
    end
  when nil
    self.is_not_null
  when Arel::SelectManager
    Arel::Nodes::NotIn.new(self, other.ast)
  else
    Arel::Nodes::NotIn.new(self,quoted_node(other))
  end
end

#when(right, expression = nil) ⇒ Object 



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# File 'lib/arel_extensions/predications.rb', line 3

def when right, expression=nil
  ArelExtensions::Nodes::Case.new(self).when(right,expression)
end