Lazer - database based on JSON files

PHP Library to use JSON files like a database.
Functionality inspired by ORM's

Requirements

• PHP 5.4+
• Composer

Instalation

Easiest way to install Lazer Database is to use Composer. Of course you can use your own autoloader but you must configure it properly by yourself. You can find my Package on Packagist.org.

Add the following to your composer.json and run composer update .

"require": {
    "greg0/lazer-database": "1.0.7"
}

Structure of table files

table_name.data.json - table file with data
table_name.config.json - table file with configuration

Basic Usage

First of all you should define constant LAZER_DATA_PATH containing absolute path to folder with JSON files:

define('LAZER_DATA_PATH', realpath(dirname(__FILE__)).'/data/'); //Path to folder with tables

Then set up namespace:

use Lazer\Classes\Database as Lazer; // example

Methods

Chain methods

• limit() - returns results between a certain number range. Should be used right before ending method find_all().
• orderBy() - sort rows by key in order, can order by more than one field (just chain it).
• groupBy() - group rows by field.
• where() - filter records. Alias: and_where().
• orWhere() - other type of filtering results.
• with() - join other tables by defined relations

Ending methods

• addFields() - append new fields into existing table
• deleteFields() - removing fields from existing table
• save() - insert or Update data.
• delete() - deleting data.
• relations() - returns array with table relations
• config() - returns object with configuration.
• fields() - returns array with fields name.
• schema() - returns assoc array with fields name and fields type field => type.
• lastId() - returns last ID from table.
• count() - returns the number of rows.
• find() - returns one row with specified ID.
• findAll() - returns rows.
• asArray() - returns data as indexed or assoc array: ['field_name' => 'field_name']. Should be used after ending method find_all().

Create database

Lazer::create('table_name', array(
    'id' => 'integer',
    'nickname' => 'string',
    {field_name} => {field_type}
));

More informations about field types and usage in PHPDoc

Remove database

Lazer::remove('table_name');

Check if a database exists

try{
    \Lazer\Classes\Helpers\Validate::table('table_name')->exists();
} catch(\Lazer\Classes\LazerException $e){
    //Database doesn't exist
}

Select

Multiple select

$table = Lazer::table('table_name')->findAll();
    
foreach($table as $row)
{
    print_r($row);
}

Single record select

$row = Lazer::table('table_name')->find(1);

echo $row->id;

Type ID of row in find() method.

You also can do something like that to get first matching record:

$row = Lazer::table('table_name')->where('name', '=', 'John')->find();

echo $row->id;

Insert

$row = Lazer::table('table_name');

$row->nickname = 'new_user';
$row->save();

Do not set the ID.

Update

It's very smilar to Inserting.

$row = Lazer::table('table_name')->find(1); //Edit row with ID 1

$row->nickname = 'edited_user';

$row->save();

Remove

Single record deleting

Lazer::table('table_name')->find(1)->delete(); //Will remove row with ID 1

// OR

Lazer::table('table_name')->where('name', '=', 'John')->find()->delete(); //Will remove John from DB

Multiple records deleting

Lazer::table('table_name')->where('nickname', '=', 'edited_user')->delete();

Clear table

Lazer::table('table_name')->delete();

Relations

To work with relations use class Relation

use Lazer\Classes\Relation; // example

Relation types

• belongsTo - relation many to one
• hasMany - relation one to many
• hasAndBelongsToMany - relation many to many

Methods

Chain methods

• belongsTo() - set relation belongsTo
• hasMany() - set relation hasMany
• hasAndBelongsToMany() - set relation hasAndBelongsToMany
• localKey() - set relation local key
• foreignKey() - set relation foreign key
• with() - allow to work on existing relation

Ending methods

• setRelation() - creating specified relation
• removeRelation() - creating specified relation
• getRelation() - return informations about relation

Create relation

Relation::table('table1')->belongsTo('table2')->localKey('table2_id')->foreignKey('id')->setRelation();
Relation::table('table2')->hasMany('table1')->localKey('id')->foreignKey('table2_id')->setRelation();
Relation::table('table2')->hasAndBelongsToMany('table1')->localKey('id')->foreignKey('id')->setRelation(); // Junction table will be crete automaticly

Remove relation

Relation::table('table1')->with('table2')->removeRelation();

Get relation information

You can do it by two ways. Use Standard Database class or Relation but results will be different.

Relation::table('table1')->with('table2')->getRelation(); // relation with specified table
Lazer::table('table1')->relations(); // all relations
Lazer::table('table1')->relations('table2'); // relation with specified table

Description

For some examples please check examples.md and tutorial.md file. More informations you can find in PHPDoc, I think it's documented very well.

Homepage: http://greg0.ovh.org
E-mail: [email protected]

If you like and using/want to use my repo or you have any suggestions I will be greatful for sending me few words on e-mail.