Class: ArelExtensions::Nodes::DateAdd

Inherits:
Function show all
Defined in:
lib/arel_extensions/nodes/date_diff.rb

Constant Summary collapse

RETURN_TYPE = 
:date

Constants inherited from Function

Function::MBSTRING

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Function

#!=, #==, #as, #convert_to_date_node, #convert_to_datetime_node, #convert_to_node, #convert_to_number, #convert_to_string_node, #expr, #left, #return_type, #right, #type_of_attribute

Methods included from Predications

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

Methods inherited from Arel::Nodes::Function

#as

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, #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 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

#initialize(expr) ⇒ DateAdd

Returns a new instance of DateAdd.



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 40

def initialize expr
  col = expr.first
  @date_type = type_of_attribute(col)
  tab = expr.map do |arg|
    convert(arg)
  end
  super(tab)
end

Instance Attribute Details

#date_type ⇒ Object

Returns the value of attribute date_type.



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 38

def date_type
  @date_type
end

Instance Method Details

#mssql_datepart(v = nil) ⇒ Object 



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

def mssql_datepart(v = nil)
  v ||= self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :date
      Arel.sql('day')
    elsif @date_type == :datetime
      res = if v.parts.size == 1
              #       first entry in the dict v.parts; one of [:years, :months, :weeks, :days, :hours, :minutes, :seconds]
              #       |     the key
              #       |     |     convert symbol to string
              #       |     |     |   remove the plural suffix `s`
              #       v     v     v   v
              v.parts.first.first.to_s[0..-2]
            else
              'second'
            end
      Arel.sql(res)
    end
  else
    if ArelExtensions::Nodes::Duration === v
      v.with_interval = true
      case v.left
      when 'd', 'm', 'y'
        Arel.sql('day')
      when 'h', 'mn', 's'
        Arel.sql('second')
      when /i\z/
        Arel.sql(ArelExtensions::Visitors::MSSQL::LOADED_VISITOR::DATE_MAPPING[v.left[0..-2]])
      else
        Arel.sql(ArelExtensions::Visitors::MSSQL::LOADED_VISITOR::DATE_MAPPING[v.left])
      end
    end
  end
end

#mssql_value(v = nil) ⇒ Object 



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 114

def mssql_value(v = nil)
  v ||= self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :date
      v.to_i / (24 * 3600)
    elsif @date_type == :datetime
      if v.parts.size == 1
        #       first entry in the dict v.parts; one of [:years, :months, :weeks, :days, :hours, :minutes, :seconds]
        #       |     the value
        #       |     |
        #       |     |
        #       v     v
        v.parts.first.second
      else
        v.to_i
      end
    end
  else
    v
  end
end

#mysql_value(v = nil) ⇒ Object 



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 62

def mysql_value(v = nil)
  v ||= self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :date || @date_type == :datetime
      Arel.sql('INTERVAL %s' % v.inspect.sub(/s\Z/, ''))
    end
  else
    if ArelExtensions::Nodes::Duration === v
      v.with_interval = true
      v
    else
      v
    end
  end
end

#oracle_value(v = nil) ⇒ Object 



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 96

def oracle_value(v = nil)
  v ||= self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :ruby_date
      Arel.sql("(INTERVAL '1' DAY) * %s" % v.inspect.to_i)
    else
      Arel.sql("(INTERVAL '1' SECOND) * %s" % v.to_i)
    end
  else
    if ArelExtensions::Nodes::Duration === v
      v.with_interval = true
      v
    else
      v
    end
  end
end

#postgresql_value(v = nil) ⇒ Object 



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 78

def postgresql_value(v = nil)
  v ||= self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :date
      Arel.sql("INTERVAL '%s'" % v.inspect.sub(/s\Z/, '').upcase)
    elsif @date_type == :datetime
      Arel.sql("INTERVAL '%s'" % v.inspect.sub(/s\Z/, '').upcase)
    end
  else
    if ArelExtensions::Nodes::Duration === v
      v.with_interval = true
      v
    else
      v
    end
  end
end

#sqlite_value ⇒ Object 



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# File 'lib/arel_extensions/nodes/date_diff.rb', line 49

def sqlite_value
  v = self.expressions.last
  if defined?(ActiveSupport::Duration) && ActiveSupport::Duration === v
    if @date_type == :date
      Arel.quoted((v.value >= 0 ? '+' : '-') + v.inspect)
    elsif @date_type == :datetime
      Arel.quoted((v.value >= 0 ? '+' : '-') + v.inspect)
    end
  else
    v
  end
end