Creating migrations files to create movies table and add movies check constraints. Updating API version number. Updating README.md adding 'SQL Migrations' section. Updating deployment file to make migrations before building API. Adding some .idea files into .gitignore.

migrations/000001_create_movies_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS movies;

migrations/000001_create_movies_table.up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS movies (
+    id bigserial PRIMARY KEY,
+    created_at timestamp(0) with time zone NOT NULL DEFAULT NOW(),
+    title text NOT NULL,
+    year integer NOT NULL,
+    runtime integer NOT NULL,
+    genres text[] NOT NULL,
+    version integer NOT NULL DEFAULT 1
+);

migrations/000002_add_movies_check_constraints.down.sql

@@ -0,0 +1,3 @@
+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_length_check;

migrations/000002_add_movies_check_constraints.up.sql

@@ -0,0 +1,5 @@
+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_length_check CHECK (array_length(genres, 1) BETWEEN 1 AND 5);