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Example code of shopware/dbal-nested-set

Informations about the package dbal-nested-set

Doctrine DBAL Nested Set

Used in B2B Suite for Shopware 5

A multi root nested set implementation for DBAL users.

Description

This library provides you write, read and inspection classes for nested sets with multiple root nodes per table. Solely relying on the Doctrine DBAL.

Contrary to other solutions this library has clear boundaries and leaves the software design up to you.

Installation

Use composer to install the library

Usage

You always need a configuration that sets up the basic column names of your implementation:

Then you can use the NestedSetFactory to create the different classes of the library.

Create a tree

You may want to create a normalized schema for nested set tables, this can be accomplished through the NestedSetTableFactory. It will create the base DDL for a tree with indexes. So if you want to add a simple tree with a name column and an autoincrement id it will look like this:

Of course this is optional and may be accomplished through any schema configuration tool.

Modify the tree

The library provides a NestedSetWriter class that contains all insert, move and update operations. All operations should be reminiscent of Doctrine\DBAL\Connection::insert() and Doctrine\DBAL\Connection::update() and just require plain data.

As an example you can use this to create a tree

And then use the writer to move nodes around

Inspect nodes

You may want to retrieve information about different nodes. This can be done through the NestedSetTableNodeInspector.

Inspect the tree

The NestedSetQueryFactory helps retrieve a set of nodes from the tree. Since the library has no concept of entities it will only prepare query builders for you ready to add selects, joins and other conditions.

Local development

If you want to develop locally you may have to configure the database access through a little shell script:

All versions of dbal-nested-set with dependencies

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Requires php Version ^7.2|^8.0
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