Module: ArelExtensions::Predications
- Included in:
- Arel::Nodes::Binary, Arel::Nodes::Function, Arel::Nodes::Grouping, Arel::Nodes::Unary, Attributes, Nodes::Case, Nodes::Function
- Defined in:
- lib/arel_extensions/predications.rb
Instance Method Summary collapse
- #cast(right) ⇒ Object
- #convert_to_node(object) ⇒ Object
- #imatches(other, escape = nil) ⇒ Object
-
#in(*other) ⇒ Object
In should handle nil element in the Array.
- #matches(other, escape = nil, case_sensitive = nil) ⇒ Object
-
#not_in(*other) ⇒ Object
In should handle nil element in the Array.
- #when(right, expression = nil) ⇒ Object
Instance Method Details
#cast(right) ⇒ Object
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# File 'lib/arel_extensions/predications.rb', line 20 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 80 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 16 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 24 def in(*other) #In should handle nil element in the Array other = other.first if other.length <= 1 case other when Range self.between(other) when Arel::Nodes::Grouping Arel::Nodes::In.new(self, quoted_node(other)) when Enumerable nils, values = other.partition{ |v| v.nil? } ranges, values = values.partition{ |v| v.is_a?(Range) || v.is_a?(Arel::SelectManager)} # In order of (imagined) decreasing efficiency: nil, values, and then more complex. clauses = nils.uniq.map { |r| self.in(r) } \ + (case values.uniq.size when 0 then [] when 1 then [values[0].is_a?(Arel::Nodes::Grouping) ? self.in(values[0]) : self.eq(values[0])] else [Arel::Nodes::In.new(self, quoted_array(values))] end) \ + ranges.uniq.map { |r| self.in(r) } clauses.empty? ? Arel.false : clauses.reduce(&:or) 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 8 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 other = other.first if other.length <= 1 case other when Range Arel::Nodes::Not.new(self.between(other)) when Arel::Nodes::Grouping Arel::Nodes::NotIn.new(self, quoted_node(other)) when Enumerable nils, values = other.partition{ |v| v.nil? } ranges, values = values.partition{ |v| v.is_a?(Range) || v.is_a?(Arel::SelectManager)} # In order of (imagined) decreasing efficiency: nil, values, and then more complex. clauses = nils.uniq.map { |r| self.not_in(r) } \ + (case values.uniq.size when 0 then [] when 1 then [values[0].is_a?(Arel::Nodes::Grouping) ? self.not_in(values[0]) : self.not_eq(values[0])] else [Arel::Nodes::NotIn.new(self, quoted_array(values))] end) \ + ranges.uniq.map { |r| self.not_in(r) } Arel::Nodes::And.new clauses 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 4 def when right, expression = nil ArelExtensions::Nodes::Case.new(self).when(right,expression) end |