DBM: Database Manager for Onset

A simple lightweight library for handling CRUD operations in your database.

NOTE: This is a proof of concept only - NOT recommended for actual game servers.

Configure Database Settings

Copy the config.lua.example file and name it config.lua. Edit it to provide your database credentials. The database MUST already exist. DBM can create the table schemas for you, but not the database.

Import DBM Package

DBM = ImportPackage("dbm")

Initialize/Create Table

DBM.InitTable(<table_name>, <fields>, [<force_recreate>])

Example:

DBM.InitTable("users", {
	steamid = { type = 'number', max_length = 50, unique = true },
	username = { type = 'char', max_length = 100 },
	password = { type = 'char', max_length = 50 },
	age = { type = 'number', max_length = 2 },
	job = { type = 'char', max_length = 50, null = true, default = 'foo'},
	description = { type = 'text', null = true },
	registered_at = { type = 'datetime', null = true }
}, true)

Note, the force_recreate is optional and defaults to false.

Schema Options

• type - Maps to DB datatype. Must be one of char, text, number, or datetime.
• max_length - Maximum length allowed for the value.
• unique - Enforce uniqueness on this value.
• null - Whether or not NULL value is allowed. Defaults to false.
• default - Default value is one isn't specified.

Select Rows

DBM.SelectRows(<table_name>, <fields>, <where>)

TODO: Not yet implemented

Insert Row

DBM.InsertRow(<table_name>, <params>)

Example:

DBM.InsertRow("users", { steamid = 9876543210, username = 'oweff', password = 'dontknow', age = 25 })

# INSERT INTO `users` (`job`, `password`, `username`, `description`, `age`, `steamid`, `registered_at`) VALUES (NULL, 'dontknow', 'oweff', NULL, 25, 1286608618, NULL)

Update Rows

DBM.UpdateRows(<table_name>, <params>, <where>)

Example:

DBM.UpdateRows("users", { steamid = 9876543210 }, { age = 28, password = 'password1' })

# UPDATE users SET steamid = 1286608618 WHERE (password = 'password1' AND age = 28)

Delete Rows

DBM.DeleteRows(<table_name>, <where>)

TODO: Not yet implemented

TODO

• Query builder to support more operators (AND, OR, LIKE, EQ, GT, LT)