[config] Error occurs when the key attribute is removed from the child node and only a key named 'value' is left there #15270
Description
When the key attribute is removed from a child node of a prototyped array node, if there is only one key named 'value' left in the child node, the child node will be degenerated from an array into a string.
When processing the config tree, an 'Symfony\Component\Config\Definition\Exception\InvalidTypeException' is thrown.
The root cause of this issue is:
before the degeneration, the prototype of the child node is ArrayNode and the child node matches its prototype. After the degeneration, the child node has become a ScalarNode, but its prototype is still ArrayNode.
I have created PR #14082 for this issue, but didn't receive any feedback yet.
The following example may reproduce this issue:
<?php
$loader = require_once __DIR__.'/app/autoload.php';
use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\Processor;
use Symfony\Component\Yaml\Parser as YamlParser;
$builder = new TreeBuilder();
$configs = array();
$parser = new YamlParser();
$files = array(__DIR__.'/attribute-as-key-left-value-only.yml');
$root = $builder->root('app');
$root
->fixXmlConfig('parameter')
->children()
->arrayNode('parameters')
->useAttributeAsKey('name')
->prototype('array')
->children()
->scalarNode('name')->end()
->scalarNode('value')->end()
->end()
->end()
->end();
foreach($files as $file)
{
$config = $parser->parse(file_get_contents($file));
$configs[] = $config['app'];
}
$processor = new Processor();
$tree = $builder->buildTree();
$result = $processor->process($tree, $configs);# attribute-as-key-left-value-only.yml
app:
parameters:
- name: server_name
value: web.local
- name: ip
value: 192.168.1.2
- name: username
value: admin
- name: password
value: password