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- #### Create
- starwars = Movie.create!(:title => 'Star Wars',
- :release_date => '25/4/1977', :rating => 'PG')
- # note that numerical dates follow European format: dd/mm/yyyy
- requiem = Movie.create!(:title => 'Requiem for a Dream',
- :release_date => 'Oct 27, 2000', :rating => 'R')
- # Creation using separate 'save' method, used when updating existing records
- field = Movie.new(:title => 'Field of Dreams',
- :release_date => '21-Apr-89', :rating => 'PG')
- field.save!
- field.title = 'New Field of Dreams'
- #### Read
- pg_movies = Movie.where("rating = 'PG'")
- ancient_movies = Movie.where('release_date < :cutoff and rating = :rating',
- :cutoff => 'Jan 1, 2000', :rating => 'PG')
- pg_movies_2 = Movie.find_by_rating('PG')
- Movie.find(3) # exception if key not found; find_by_id returns nil instead
- #### Update
- starwars.update_attributes(:description => 'The best space western EVER',
- :release_date => '25/5/1977')
- requiem.rating = 'NC-17'
- requiem.save!
- #### Delete
- requiem.destroy
- Movie.where('title = "Requiem for a Dream"')
- #### Find returns an enumerable
- Movie.find_all_by_rating('PG').each do |mov|
- mov.destroy
- end
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