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 79

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
	res = nil
	case other
	when Enumerable
		if other.include?(nil)
			other.delete(nil)
			case other.length
			when 0
				res = self.is_null
			when 1
				res = self.is_null.or(self==other[0])
			else
				res = self.is_null.or(Arel::Nodes::In.new(self,quoted_array(other)))
			end
		else
			res = Arel::Nodes::In.new(self,quoted_array(other))
		end
	when nil
		res = self.is_null
	when Arel::SelectManager
		res = Arel::Nodes::In.new(self, other.ast)
	when Range
		res = self.between(other)
	else
		res = Arel::Nodes::In.new(self,quoted_node(other))
	end
	res			 
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 52

def not_in(other) #In should handle nil element in the Array
	res = nil
	case other
	when Enumerable
		if other.include?(nil)
			other.delete(nil)
			case other.length
			when 0
				res = self.is_not_null
			when 1
				res = self.is_not_null.and(self!=other[0])
			else
				res = self.is_not_null.and(Arel::Nodes::NotIn.new(self,quoted_array(other)))
			end
		else
			res = Arel::Nodes::NotIn.new(self,quoted_array(other))
		end
	when nil
		res = self.is_not_null
	when Arel::SelectManager
		res = Arel::Nodes::NotIn.new(self, other.ast)
	else
		res = Arel::Nodes::NotIn.new(self,quoted_node(other))
	end
	res
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