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author | Josh Sharpe <josh.m.sharpe@gmail.com> | 2009-08-31 12:50:27 -0500 |
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committer | Joshua Peek <josh@joshpeek.com> | 2009-08-31 12:50:27 -0500 |
commit | 80989437dc1502f9194b0600941b6d70a3efa3b2 (patch) | |
tree | a899f747b89ed6b912ee7218d4f9e01f95fe2d25 /railties/lib/generators/erb/scaffold/templates/_form.html.erb | |
parent | 57f7308da4dff57639f8e67a830baab358aaa5df (diff) | |
download | rails-80989437dc1502f9194b0600941b6d70a3efa3b2.tar.gz rails-80989437dc1502f9194b0600941b6d70a3efa3b2.tar.bz2 rails-80989437dc1502f9194b0600941b6d70a3efa3b2.zip |
I added this feature so that a Map of changed fields could be retrieved
after a model had been saved. This is useful in the after_save callback
when you need to know what fields changed. At present there is no way
to do this other than have code in the before_save callback that takes
a copy of the changes Map, which I thought was a bit messy.
Example.
person = Person.find_by_name('bob')
person.name = 'robert'
person.changes # => {'name' => ['bob, 'robert']}
person.save
person.changes # => {}
person.previous_changes # => {'name' => ['bob, 'robert']}
person.reload
person.previous_changes # => {}
Signed-off-by: Joshua Peek <josh@joshpeek.com>
Diffstat (limited to 'railties/lib/generators/erb/scaffold/templates/_form.html.erb')
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