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Sequel::Postgres::HStore

Constants

COMMA
DEFAULT_PROC

Default proc used for all underlying HStore hashes, so that even if you grab the underlying hash, it will still convert non-string keys to strings during lookup.

ESCAPE_RE
ESCAPE_REPLACE
HSTORE_CAST
KV_SEP
NULL
QUOTE

Public Class Methods

_load(args) click to toggle source

Use custom marshal loading, since underlying hash uses a default proc.

# File lib/sequel/extensions/pg_hstore.rb, line 205
def self._load(args)
  new(Hash[Marshal.load(args)])
end
parse(str) click to toggle source

Parse the given string into an HStore, assuming the str is in PostgreSQL hstore output format.

# File lib/sequel/extensions/pg_hstore.rb, line 211
def self.parse(str)
  new(Parser.new(str).parse)
end

Public Instance Methods

_dump(*) click to toggle source

Use custom marshal dumping, since underlying hash uses a default proc.

# File lib/sequel/extensions/pg_hstore.rb, line 237
def _dump(*)
  Marshal.dump(to_a)
end
fetch(key, *args, &block) click to toggle source

Override to force the key argument to a string.

# File lib/sequel/extensions/pg_hstore.rb, line 242
def fetch(key, *args, &block)
  super(key.to_s, *args, &block)
end
merge(hash, &block) click to toggle source

Convert the input hash to string keys and values before merging, and return a new HStore instance with the merged hash.

# File lib/sequel/extensions/pg_hstore.rb, line 248
def merge(hash, &block)
  self.class.new(super(convert_hash(hash), &block))
end
op() click to toggle source

Wrap the receiver in an HStoreOp so you can easily use the PostgreSQL hstore functions and operators with it.

# File lib/sequel/extensions/pg_hstore_ops.rb, line 299
def op
  HStoreOp.new(self)
end
sql_literal_append(ds, sql) click to toggle source

Append a literalize version of the hstore to the sql.

# File lib/sequel/extensions/pg_hstore.rb, line 256
def sql_literal_append(ds, sql)
  ds.literal_append(sql, unquoted_literal)
  sql << HSTORE_CAST
end
unquoted_literal() click to toggle source

Return a string containing the unquoted, unstring-escaped literal version of the hstore. Separated out for use by the bound argument code.

# File lib/sequel/extensions/pg_hstore.rb, line 264
def unquoted_literal
  str = ''
  comma = false
  commas = COMMA
  quote = QUOTE
  kv_sep = KV_SEP
  null = NULL
  each do |k, v|
    str << commas if comma
    str << quote << escape_value(k) << quote
    str << kv_sep
    if v.nil?
      str << null
    else
      str << quote << escape_value(v) << quote
    end
    comma = true
  end
  str
end

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