Class: Arel::Nodes::Function
Do not use. This class is for internal use only.
Relationships & Source Files | |
Extension / Inclusion / Inheritance Descendants | |
Subclasses:
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Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
NodeExpression ,
Node
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Instance Chain:
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Inherits: |
Arel::Nodes::NodeExpression
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Defined in: | activerecord/lib/arel/nodes/function.rb |
Class Method Summary
- .new(expr, aliaz = nil) ⇒ Function constructor
Instance Attribute Summary
Instance Method Summary
-
#==(other)
Alias for #eql?.
- #as(aliaz)
- #eql?(other) ⇒ Boolean (also: #==)
- #hash
::Arel::FilterPredications
- Included
::Arel::WindowPredications
- Included
::Arel::Math
- Included
::Arel::OrderPredications
- Included
::Arel::AliasPredication
- Included
::Arel::Predications
- Included
::Arel::Expressions
- Included
Node
- Inherited
#and | Factory method to create an And node. |
#fetch_attribute, #invert, | |
#not | Factory method to create a |
#or | |
#to_sql | FIXME: this method should go away. |
::Arel::FactoryMethods
- Included
#cast, #coalesce, #create_and, #create_false, #create_join, #create_on, #create_string_join, #create_table_alias, #create_true, #grouping, | |
#lower | Create a LOWER() function. |
Constructor Details
.new(expr, aliaz = nil) ⇒ Function
# File 'activerecord/lib/arel/nodes/function.rb', line 10
def initialize(expr, aliaz = nil) super() @expressions = expr @alias = aliaz && SqlLiteral.new(aliaz) @distinct = false end
Instance Attribute Details
#alias (rw)
[ GitHub ]# File 'activerecord/lib/arel/nodes/function.rb', line 8
attr_accessor :expressions, :alias, :distinct
#distinct (rw)
[ GitHub ]# File 'activerecord/lib/arel/nodes/function.rb', line 8
attr_accessor :expressions, :alias, :distinct
#expressions (rw)
[ GitHub ]# File 'activerecord/lib/arel/nodes/function.rb', line 8
attr_accessor :expressions, :alias, :distinct
Instance Method Details
#==(other)
Alias for #eql?.
# File 'activerecord/lib/arel/nodes/function.rb', line 32
alias :== :eql?
#as(aliaz)
[ GitHub ]# File 'activerecord/lib/arel/nodes/function.rb', line 17
def as(aliaz) self.alias = SqlLiteral.new(aliaz) self end
#eql?(other) ⇒ Boolean
Also known as: #==
# File 'activerecord/lib/arel/nodes/function.rb', line 26
def eql?(other) self.class == other.class && self.expressions == other.expressions && self.alias == other.alias && self.distinct == other.distinct end
#hash
[ GitHub ]# File 'activerecord/lib/arel/nodes/function.rb', line 22
def hash [@expressions, @alias, @distinct].hash end