Class: ActiveRecord::ConnectionAdapters::AmalgaliteColumn

Inherits:
Column
  • Object
show all
Defined in:
lib/active_record/connection_adapters/amalgalite_adapter.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.binary_to_string(value) ⇒ Object

since the type is blog, the amalgalite drive extracts it as a blob and we need to convert back into a string and do the substitution



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# File 'lib/active_record/connection_adapters/amalgalite_adapter.rb', line 56

def self.binary_to_string(value)
  value.to_s.gsub(/%00|%25/n) do |b|
    case b
      when "%00" then "\0"
      when "%25" then "%"
    end
  end
end

.datetime_to_time(dt) ⇒ Object

AR asks to convert a datetime column to a time and then passes in a string… WTF ?



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# File 'lib/active_record/connection_adapters/amalgalite_adapter.rb', line 67

def self.datetime_to_time( dt )
  case dt
  when String
    return nil if dt.empty?
  when DateTime
    return dt.to_time
  when Time
    return dt.to_time
  end
end

.from_amalgalite(am_col) ⇒ Object 



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# File 'lib/active_record/connection_adapters/amalgalite_adapter.rb', line 35

def self.from_amalgalite( am_col )
  new( am_col.name,
      am_col.default_value,
      am_col.declared_data_type,
      am_col.nullable? )
end

.string_to_binary(value) ⇒ Object

unfortunately, not able to use the Blob interface as that requires knowing what column the blob is going to be stored in. Use the approach in the sqlite3 driver.



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# File 'lib/active_record/connection_adapters/amalgalite_adapter.rb', line 45

def self.string_to_binary( value )
  value.gsub(/\0|\%/n) do |b|
    case b
      when "\0" then "%00"
      when "%"  then "%25"
    end
  end
end

Instance Method Details

#type_cast_code(var_name) ⇒ Object

active record assumes that type casting is from a string to a value, and it might not be. It might be something appropriate for the field in question, like say a DateTime for a :datetime field?.



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# File 'lib/active_record/connection_adapters/amalgalite_adapter.rb', line 81

def type_cast_code( var_name )
  case type 
  when :datetime   then "#{self.class.name}.datetime_to_time(#{var_name})"
  else
    super
  end
end