add schema.sql

Vagrantfile

@@ -5,7 +5,7 @@ Vagrant.configure(2) do |config|
   config.vm.box = "ubuntu/trusty64"
   config.vm.network "forwarded_port", guest: 80, host: 8080
   config.vm.network "private_network", ip: "192.168.33.16"
-  config.vm.synced_folder "./", "/home/vagrant/", create: true, :nfs => true
+  config.vm.synced_folder "./", "/home/vagrant/", create: true
   config.vm.provider "virtualbox" do |vb|
     vb.memory = "512"
   end

dumps/students/s_07/schema.sql

@@ -0,0 +1,63 @@
+DROP TABLE IF EXISTS persons CASCADE;
+DROP TABLE IF EXISTS agents CASCADE;
+DROP TABLE IF EXISTS countries CASCADE;
+DROP TABLE IF EXISTS persons_agents CASCADE;
+DROP TABLE IF EXISTS cities CASCADE;
+DROP TABLE IF EXISTS tours CASCADE;
+DROP TABLE IF EXISTS persons_tours CASCADE;
+
+CREATE TABLE persons(
+    id               SERIAL PRIMARY KEY,
+    first_name       VARCHAR(50) NOT NULL,
+    last_name        VARCHAR(50) NOT NULL,
+    code_name        VARCHAR(20) NOT NULL,
+    born_year        SMALLINT NOT NULL CONSTRAINT positive_age CHECK (born_year > 1900) AND (born_year < 2000)
+);
+
+CREATE TABLE agents(
+   id               SERIAL PRIMARY KEY,
+   first_name       VARCHAR(50) NOT NULL,
+   last_name        VARCHAR(50) NOT NULL,   
+   code_name        VARCHAR(20) NOT NULL,
+   online           BOOLEAN,
+   experience       SMALLINT NOT NULL CONSTRAINT positive_age CHECK (experience >= 0),
+   description      TEXT
+);
+
+CREATE TABLE persons_agents(
+    id              SERIAL PRIMARY KEY,
+    person_id       INT REFERENCES persons (id),
+    agent_id        INT REFERENCES agents (id)
+);
+
+CREATE TABLE countries(
+   id               SERIAL PRIMARY KEY,
+   name             VARCHAR(50) NOT NULL,
+   code             VARCHAR(3) NOT NULL
+);
+
+CREATE TABLE cities(
+   id               SERIAL PRIMARY KEY,
+   country_id       INT REFERENCES countries (id),
+   name             VARCHAR(50) NOT NULL,
+   type             VARCHAR(20)
+);
+
+CREATE TABLE tours(
+  id                SERIAL PRIMARY KEY,
+  name              VARCHAR(50) NOT NULL,
+  city_from_id      INT REFERENCES cities (id),
+  city_to_id        INT REFERENCES cities (id),
+  price             INT CONSTRAINT positive_area CHECK (price > 0),
+  departure_date    TIMESTAMP WITH TIME ZONE,
+  ammount_of_night  INT CONSTRAINT positive_area CHECK (ammount_of_night > 0)
+);
+
+CREATE TABLE persons_tours(
+    id               SERIAL PRIMARY KEY,
+    person_id        INT REFERENCES persons (id),
+    tour_id          INT REFERENCES tours (id)
+);
+
+
+