Class: CarrierWave::Storage::PostgresqlLo::File

Inherits:
Object
  • Object
show all
Defined in:
lib/carrierwave/storage/postgresql_lo.rb

Instance Method Summary collapse

Constructor Details

#initialize(uploader) ⇒ File

Returns a new instance of File.



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 6

def initialize(uploader)
  @uploader = uploader
end

Instance Method Details

#connection ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 51

def connection
  @connection ||= @uploader.model.class.connection.raw_connection
end

#content_type ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 37

def content_type
end

#delete ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 33

def delete
  connection.lo_unlink(identifier)
end

#file_length ⇒ Object Also known as: size 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 40

def file_length
  @uploader.model.transaction do
    lo = connection.lo_open(identifier)
    size = connection.lo_lseek(lo, 0, 2)
    connection.lo_close(lo)
    size
  end
end

#identifier ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 55

def identifier
  @oid ||= @uploader.identifier.to_i
end

#original_filename ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 59

def original_filename
  identifier.to_s
end

#read ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 14

def read
  @uploader.model.transaction do
    lo = connection.lo_open(identifier)
    content = connection.lo_read(lo, file_length)
    connection.lo_close(lo)
    content
  end
end

#url ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 10

def url
  "/#{@uploader.model.class.name.underscore.gsub('/', '_')}_#{@uploader.mounted_as.to_s.underscore}/#{identifier}"
end

#write(file) ⇒ Object 



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# File 'lib/carrierwave/storage/postgresql_lo.rb', line 23

def write(file)
  @uploader.model.transaction do
    lo = connection.lo_open(identifier, ::PG::INV_WRITE)
    connection.lo_truncate(lo, 0)
    size = connection.lo_write(lo, file.read)
    connection.lo_close(lo)
    size
  end
end