Module: ArJdbc::PostgreSQL::Column::Cast

Defined in:
lib/arjdbc/postgresql/column.rb

Overview

Note:

Based on active_record/connection_adapters/postgresql/cast.rb (4.0).

Instance Method Summary collapse

Instance Method Details

#array_to_string(value, column, adapter) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 444

def array_to_string(value, column, adapter)
  casted_values = value.map do |val|
    if String === val
      if val == "NULL"
        "\"#{val}\""
      else
        quote_and_escape(adapter.type_cast(val, column, true))
      end
    else
      adapter.type_cast(val, column, true)
    end
  end
  "{#{casted_values.join(',')}}"
end

#cidr_to_string(object) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 487

def cidr_to_string(object)
  if IPAddr === object
    "#{object.to_s}/#{object.instance_variable_get(:@mask_addr).to_s(2).count('1')}"
  else
    object
  end
end

#hstore_to_string(object, array_member = false) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 412

def hstore_to_string(object, array_member = false)
  if Hash === object
    string = object.map { |k, v| "#{escape_hstore(k)}=>#{escape_hstore(v)}" }.join(',')
    string = escape_hstore(string) if array_member
    string
  else
    object
  end
end

#json_to_string(object) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 436

def json_to_string(object)
  if Hash === object || Array === object
    ActiveSupport::JSON.encode(object)
  else
    object
  end
end

#point_to_string(point) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 372

def point_to_string(point)
  "(#{point[0]},#{point[1]})"
end

#range_to_string(object) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 459

def range_to_string(object)
  from = object.begin.respond_to?(:infinite?) && object.begin.infinite? ? '' : object.begin
  to   = object.end.respond_to?(:infinite?) && object.end.infinite? ? '' : object.end
  "[#{from},#{to}#{object.exclude_end? ? ')' : ']'}"
end

#string_to_array(string, column_or_oid) ⇒ Object

Note:

Only used for default values - we get a "parsed" array from JDBC.



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# File 'lib/arjdbc/postgresql/column.rb', line 496

def string_to_array(string, column_or_oid)
  return string unless String === string
  parse_pg_array(string).map { |val| type_cast_array(column_or_oid, val) }
end

#string_to_bit(value) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 396

def string_to_bit(value)
  case value
  when /^[01]*$/      then value             # Bit-string notation
  when /^[0-9A-F]*$/i then value.hex.to_s(2) # Hexadecimal notation
  end
end

#string_to_cidr(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 473

def string_to_cidr(string)
  if string.nil?
    nil
  elsif String === string
    begin
      IPAddr.new(string)
    rescue ArgumentError
      nil
    end
  else
    string
  end
end

#string_to_hstore(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 422

def string_to_hstore(string)
  if string.nil?
    nil
  elsif String === string
    Hash[string.scan(HstorePair).map { |k, v|
      v = v.upcase == 'NULL' ? nil : v.gsub(/\A"(.*)"\Z/m,'\1').gsub(/\\(.)/, '\1')
      k = k.gsub(/\A"(.*)"\Z/m,'\1').gsub(/\\(.)/, '\1')
      [k, v]
    }]
  else
    string
  end
end

#string_to_json(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 465

def string_to_json(string)
  if String === string
    ActiveSupport::JSON.decode(string)
  else
    string
  end
end

#string_to_money(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 351

def string_to_money(string)
  return string unless String === string

  # Because money output is formatted according to the locale, there
  # are two cases to consider (note the decimal separators) :
  # (1) $12,345,678.12
  # (2) $12.345.678,12
  # Negative values are represented as follows:
  #  (3) -$2.55
  #  (4) ($2.55)
  string = string.sub(/^\((.+)\)$/, '-\1') # (4)
  case string
  when /^-?\D+[\d,]+\.\d{2}$/ # (1)
    string.gsub!(/[^-\d.]/, '')
  when /^-?\D+[\d.]+,\d{2}$/ # (2)
    string.gsub!(/[^-\d,]/, '')
    string.sub!(/,/, '.')
  end
  value_to_decimal string
end

#string_to_point(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 376

def string_to_point(string)
  if string[0] == '(' && string[-1] == ')'
    string = string[1...-1]
  end
  string.split(',').map { |v| Float(v) }
end

#string_to_time(string) ⇒ Object 



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# File 'lib/arjdbc/postgresql/column.rb', line 383

def string_to_time(string)
  return string unless String === string

  case string
  when  'infinity' then  1.0 / 0.0
  when '-infinity' then -1.0 / 0.0
  when / BC$/
    super("-#{string.sub(/ BC$/, "")}")
  else
    super
  end
end