Class: Sequel::Postgres::HStore::Parser

Inherits:
StringScanner
  • Object
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Defined in:
lib/sequel/extensions/pg_hstore.rb

Overview

Parser for PostgreSQL hstore output format.

Instance Method Summary collapse

Instance Method Details

#parse ⇒ Object

Parse the output format that PostgreSQL uses for hstore columns. Note that this does not attempt to parse all input formats that PostgreSQL will accept. For instance, it expects all keys and non-NULL values to be quoted.

Return the resulting hash of objects. This can be called multiple times, it will cache the parsed hash on the first call and use it for subsequent calls.



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# File 'lib/sequel/extensions/pg_hstore.rb', line 108

def parse
  return @result if @result
  hash = {}
  while !eos?
    skip(/"/)
    k = parse_quoted
    skip(/"\s*=>\s*/)
    if skip(/"/)
      v = parse_quoted
      skip(/"/)
    else
      scan(/NULL/)
      v = nil
    end
    skip(/,\s*/)
    hash[k] = v
  end
  @result = hash
end