Adding constraints to movies table

migrations/000002_add_movies_check_constraint.down.sql

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+ALTER TABLE movies DROP CONSTRAINT IF EXISTS movies_runtime_check;
+ALTER TABLE movies DROP CONSTRAINT IF EXISTS movies_year_check;
+ALTER TABLE movies DROP CONSTRAINT IF EXISTS genres_check_check;

migrations/000002_add_movies_check_constraint.up.sql

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+ALTER TABLE movies ADD CONSTRAINT movies_runtime_check CHECK (runtime >= 0);
+ALTER TABLE movies ADD CONSTRAINT movies_year_check CHECK (year BETWEEN 1888 and date_part('year', now()));
+ALTER TABLE movies ADD CONSTRAINT genres_check_check CHECK (array_length(genres, 1) BETWEEN 1 AND 5);