class Sequel::Postgres::HStore::Parser
Parser for PostgreSQL hstore output format.
Constants
- KV_SEP_RE
- NULL_RE
- QUOTED_RE
- QUOTE_RE
- REPLACE_RE
- REPLACE_WITH
- SEP_RE
Public Instance Methods
parse()
click to toggle source
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.
# File lib/sequel/extensions/pg_hstore.rb, line 113 def parse return @result if @result hash = {} while !eos? skip(QUOTE_RE) k = parse_quoted skip(KV_SEP_RE) if skip(QUOTE_RE) v = parse_quoted skip(QUOTE_RE) else scan(NULL_RE) v = nil end skip(SEP_RE) hash[k] = v end @result = hash end
Private Instance Methods
parse_quoted()
click to toggle source
Parse and unescape a quoted key/value.
# File lib/sequel/extensions/pg_hstore.rb, line 136 def parse_quoted scan(QUOTED_RE).gsub(REPLACE_RE, REPLACE_WITH) end