Class: ArelExtensions::Nodes::Function

Inherits:
Arel::Nodes::Function show all
Includes:
Arel::Expressions, Arel::Math, Arel::OrderPredications, Predications
Defined in:
lib/arel_extensions/nodes/function.rb

Constant Summary collapse

RETURN_TYPE =

by default…

:string
MBSTRING =

Support multibyte string if they are available.

defined?(ActiveSupport::Multibyte::Chars) ? ActiveSupport::Multibyte::Chars : String

Instance Attribute Summary

Attributes inherited from Arel::Nodes::Function

#alias

Instance Method Summary collapse

Methods included from Predications

#cast, #imatches, #in, #matches, #not_in, #when

Methods inherited from Arel::Nodes::Function

#initialize, #old_initialize

Methods included from ArelExtensions::NullFunctions

#coalesce, #coalesce_blank, #if_present, #is_not_null, #is_null

Methods included from BooleanFunctions

#and, #or, #then, #⋀, #⋁

Methods included from StringFunctions

#&, #[], #ai_collate, #ai_imatches, #ai_matches, #blank, #byte_length, #byte_size, #char_length, #ci_collate, #collate, #concat, #downcase, #edit_distance, #group_concat, #idoes_not_match, #idoes_not_match_all, #idoes_not_match_any, #imatches, #imatches_all, #imatches_any, #length, #levenshtein_distance, #locate, #ltrim, #md5, #not_blank, #regexp_replace, #repeat, #replace, #rtrim, #smatches, #soundex, #substring, #trim, #upcase

Methods included from Warning

#deprecated

Methods included from MathFunctions

#*, #/, #abs, #ceil, #floor, #format_number, #log10, #pow, #power, #round, #std, #sum, #variance

Methods included from DateDuration

#day, #format, #format_date, #hour, #minute, #month, #second, #wday, #week, #year

Methods included from Comparators

#!~, #<, #<=, #=~, #>, #>=

Methods included from Math

#+, #-

Methods included from Aliases

#xas

Constructor Details

This class inherits a constructor from Arel::Nodes::Function

Instance Method Details

#!=(other) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 51

def !=(other)
  Arel::Nodes::NotEqual.new self, Arel.quoted(other, self)
end

#==(other) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 47

def ==(other)
  Arel::Nodes::Equality.new self, Arel.quoted(other, self)
end

#as(other) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 29

def as other
  res = Arel::Nodes::As.new(self.clone, Arel.sql(other))
  self.alias = Arel.sql(other)
  res
end

#convert_to_date_node(object) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 121

def convert_to_date_node(object)
  case object
  when Arel::Attributes::Attribute, Arel::Nodes::Node
    object
  when DateTime, Time
    Arel.quoted(Date.new(object.year, object.month, object.day), self)
  when MBSTRING, String
    Arel.quoted(Date.parse(object.to_s), self)
  when Date
    Arel.quoted(object, self)
  else
    raise(ArgumentError, "#{object.class} cannot be converted to Date")
  end
end

#convert_to_datetime_node(object) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 136

def convert_to_datetime_node(object)
  case object
  when Arel::Attributes::Attribute, Arel::Nodes::Node
    object
  when DateTime, Time
    Arel.quoted(object, self)
  when MBSTRING, String
    Arel.quoted(Time.parse(object.to_s), self)
  when Date
    Arel.quoted(Time.utc(object.year, object.month, object.day, 0, 0, 0), self)
  else
    raise(ArgumentError, "#{object.class} cannot be converted to Datetime")
  end
end

#convert_to_node(object) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 66

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

#convert_to_number(object) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 151

def convert_to_number(object)
  case object
  when ArelExtensions::Nodes::Duration
    object.with_interval = true
    object
  when Arel::Attributes::Attribute, Arel::Nodes::Node
    object
  when Integer
    object.to_i.abs
  when DateTime, Date, Time, String, ActiveSupport::Duration
    object.to_i.abs
  when NilClass
    0
  else
    raise(ArgumentError, "#{object.class} cannot be converted to NUMBER arg")
  end
end

#convert_to_string_node(object) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 89

def convert_to_string_node(object)
  case object
  when Arel::Nodes::Node
    object
  when Integer
    Arel.quoted(object.to_s)
  when Arel::Attributes::Attribute
    case self.type_of_attribute(object)
    when :date
      ArelExtensions::Nodes::Format.new [object, 'yyyy-mm-dd']
    when :time
      ArelExtensions::Nodes::Format.new [object, '%H:%M:%S']
    else
      object
    end
  when DateTime
    Arel.quoted(object, self)
  when Time
    Arel.quoted(object.strftime('%H:%M:%S'), self)
  when MBSTRING, String
    Arel.quoted(object.to_s)
  when Date
    Arel.quoted(object, self)
  when NilClass
    Arel.sql(nil)
  when ActiveSupport::Duration
    Arel.quoted(object.to_i.to_s)
  else
    raise(ArgumentError, "#{object.class} cannot be converted to CONCAT arg")
  end
end

#expr ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 35

def expr
  @expressions.first
end

#left ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 39

def left
  @expressions.first
end

#return_type ⇒ Object

overrides as to make new Node like AliasPredication



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# File 'lib/arel_extensions/nodes/function.rb', line 25

def return_type
  self.class.const_get(:RETURN_TYPE)
end

#right ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 43

def right
  @expressions[1]
end

#type_of_attribute(att) ⇒ Object 



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# File 'lib/arel_extensions/nodes/function.rb', line 55

def type_of_attribute(att)
  case att
  when Arel::Attributes::Attribute
    Arel.column_of(att.relation.table_name, att.name.to_s)&.type || att
  when ArelExtensions::Nodes::Function
    att.return_type
    #        else
    #          nil
  end
end