Module: ActiveRecord::Locking::Pessimistic::ConvenienceMethods

Defined in:
lib/active_record/locking/pessimistic/convenience_methods.rb

Instance Method Summary collapse

Instance Method Details

#find_and_save_atomically(id, opts = {}, &block) ⇒ Object

Finds a records with the given ID, applies the block, then calls save. Returns the record.

All options are passed to #save, except for:

<tt>lock:</tt> - pass an SQL locking clause to append the end of the SELECT statement, defaults to "FOR UPDATE"

Example:

Post.find_and_save_atomically(1, validate: false, lock: "FOR SHARE") {|post| post.title = "new title" s}



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# File 'lib/active_record/locking/pessimistic/convenience_methods.rb', line 17

def find_and_save_atomically(id, opts = {}, &block)
  _find_and_apply_atomically(:save, id, opts, &block)
end

#find_and_save_atomically!(id, opts = {}, &block) ⇒ Object

Same as find_and_save_atomically, just calls #save! on the model



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# File 'lib/active_record/locking/pessimistic/convenience_methods.rb', line 22

def find_and_save_atomically!(id, opts = {}, &block)
  _find_and_apply_atomically(:save!, id, opts, &block)
end

#find_and_update_atomically(id, attrs, opts = {}) ⇒ Object

Find and update attributes, but atomically



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# File 'lib/active_record/locking/pessimistic/convenience_methods.rb', line 27

def find_and_update_atomically(id, attrs, opts = {})
  find_and_save_atomically(id, opts) {|r| r.assign_attributes attrs }
end