Class: ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Hstore

Inherits:
Type::Value
  • Object
show all
Includes:
Mutable
Defined in:
lib/active_record/connection_adapters/postgresql/oid/hstore.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#accessor ⇒ Object 



36
37
38
 
# File 'lib/active_record/connection_adapters/postgresql/oid/hstore.rb', line 36

def accessor
  ActiveRecord::Store::StringKeyedHashAccessor
end

#changed_in_place?(raw_old_value, new_value) ⇒ Boolean

Will compare the Hash equivalents of raw_old_value and new_value. By comparing hashes, this avoids an edge case where the order of the keys change between the two hashes, and they would not be marked as equal.

Returns:

  • (Boolean) 


44
45
46
 
# File 'lib/active_record/connection_adapters/postgresql/oid/hstore.rb', line 44

def changed_in_place?(raw_old_value, new_value)
  deserialize(raw_old_value) != new_value
end

#deserialize(value) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/active_record/connection_adapters/postgresql/oid/hstore.rb', line 14

def deserialize(value)
  if value.is_a?(::String)
    ::Hash[value.scan(HstorePair).map { |k, v|
      v = v.upcase == "NULL" ? nil : v.gsub(/\A"(.*)"\Z/m, '\1').gsub(/\\(.)/, '\1')
      k = k.gsub(/\A"(.*)"\Z/m, '\1').gsub(/\\(.)/, '\1')
      [k, v]
    }]
  else
    value
  end
end

#serialize(value) ⇒ Object 



26
27
28
29
30
31
32
33
34
 
# File 'lib/active_record/connection_adapters/postgresql/oid/hstore.rb', line 26

def serialize(value)
  if value.is_a?(::Hash)
    value.map { |k, v| "#{escape_hstore(k)}=>#{escape_hstore(v)}" }.join(", ")
  elsif value.respond_to?(:to_unsafe_h)
    serialize(value.to_unsafe_h)
  else
    value
  end
end

#type ⇒ Object 



10
11
12
 
# File 'lib/active_record/connection_adapters/postgresql/oid/hstore.rb', line 10

def type
  :hstore
end