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= New Features
* The defaults_setter plugin now supports a :cache option, which
will cache default values in the model object's values hash:
Model.plugin :defaults_setter
o = Model.new
o.column # => 1 # default value
o.values # => {}
Model.plugin :defaults_setter, cache: true
o = Model.new
o.column # => 1 # default value
o.values # => {:column => 1}
* The pg_array extension now sets a :callable_default schema entry
for recognized empty array defaults.
* The pg_hstore extension now sets a :callable_default schema entry
for recognized empty hstore defaults.
* The pg_json extension now sets a :callable_default schema entry for
recognized empty json/jsonb array/hash defaults.
* The pg_inet extension now sets a :ruby_default schema entry for
recognized inet/cidr defaults.
* The pg_range extension now sets a :ruby_default schema entry for
recognized range defaults.
* The defaults_setter plugin will now give preference to a
:callable_default schema entry over a :ruby_default schema entry.
Combined with the other changes listed above, this makes default
values recognized by the pg_array, pg_hstore, and pg_json extensions
work well if the defaults_setter :cache option is also used.
= Other Improvements
* The modification_detection plugin no longer breaks column change
detection for new objects.
* Database#copy_table in the postgres adapter now handles errors that
occur when processing rows. Previously, an exception could be
raised on the next query in that case.
* The results of the changed_columns method are now cached in many
places internally where they are called in a loop. This results
in better performance, especially if the modification_detection or
serialization_modification_detection plugins are used.
= Backwards Compatibility
* The pg_interval extension now sets a :ruby_default schema entry for
recognized interval defaults to the same value Sequel would return
if the default value was returned. Previously, Sequel would use a
string in the :ruby_schema schema value.
* String values in hashes returned by Database#schema are now frozen
to prevent possible thread-safety issues and issues with
unintentional modification of a shared string. The hashes
themselves are not frozen and can still be modified.
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