jeffnash
jeffnash
/ activerecord1.rb
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October 1, 2016 19:54
— forked from armandofox/activerecord1.rb
activerecord1.rb
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| field = Movie.new(:title => 'Title', | |
| :release_date => '21-Apr-89', :rating => 'PG') #just makes a new object, doesn't add it to DB | |
| field.save! #now it's saved in DB, the '!' means an exception will be thrown if it can't be saved | |
| field.title = 'New' #changes the object field only, it is still 'Title' in the DB unless we save again | |
| #### Read | |
| pg_movies = Movie.where("rating = 'PG'") | |
| ancient_movies = Movie.where('release_date < :cutoff and rating = :rating', | |
| :cutoff => 'Jan 1, 2000', :rating => 'PG') | |
| #### Another way to read | |
| Movie.find(3) # exception if key not found |