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ur define namespace Vending
ur define datasource sqlite --dsname Machine
Schema:
-- name the kinds of things the machine knows about
create table item_type (type_id integer PRIMARY KEY NOT NULL,
name varchar NOT NULL);
-- places where things get sloted in
create table vend_slot (slot_id integer PRIMARY KEY NOT NULL,
name varchar NOT NULL,
is_buyable integer NOT NULL,
cost_cents integer,
label varchar);
-- kinds of coins we'll accept and their value
--create table coin_type(type_id integer PRIMARY KEY NOT NULL REFERENCES item_type(type_id),
-- value_cents integer NOT NULL);
--Parent table for instances of things the machine can sell
create table vend_item (vend_item_id integer PRIMARY KEY NOT NULL,
subtype_name varchar,
slot_id integer NOT NULL REFERENCES vend_slot(slot_id));
-- instances of coins held by the machine
create table coin (coin_id integer PRIMARY KEY NOT NULL REFERENCES vend_item(vend_item_id),
type_id integer NOT NULL REFERENCES item_type(type_id));
-- kinds of things we'll sell
create table product (product_id integer PRIMARY KEY NOT NULL REFERENCES item_type(type_id),
cost_cents integer NOT NULL,
manufacturer varchar NOT NULL);
-- instances of things in the inventory
create table inventory (inv_id integer PRIMARY KEY NOT NULL,
product_id integer NOT NULL REFERENCES product(product_id),
insert_date datetime NOT NULL DEFAULT (date('now')));
ur update classes
fixup VendingMachine::Inventory
add indirect properties for name, price, is_sellable
make command line script vend
Make skeleton VendingMachine::Command
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