Symfony configuration tree builder

Question

I've been trying to make tree builder configuration with Symfony 3 to parse a configuration like that:

my_bundle:
    import:
        paths:
            - 'some/path'
            - 'another/path'

My TreeBuilder looks like this:

$rootNode
    ->children()
        ->arrayNode('import')
            ->children()
                ->arrayNode('paths')
                    ->addDefaultsIfNotSet()
                    ->defaultValue([])
                    ->cannotBeEmpty()
                ->end()
            ->end()
        ->end()
    ->end();

It is basically like two dimensional array config I would like to get as a result. Could you guys help me figure it out?

Expected parsed config:

['import' => ['paths' => ['some/path', 'another/path']]]

->defaultValue() is not applicable to concrete nodes at path "my_bundle.import.paths" — Aistis
– Aistis, Commented Sep 21, 2016 at 8:08
And what kind of behaviour do you want to archive? Why do you apply cannotBeEmpty and defaultValue([]) at the same time? [] is empty. — Dmitry Malyshenko
– Dmitry Malyshenko, Commented Sep 21, 2016 at 8:15
cannotBeEmpty is irrelevant at this point. It does even compile as valid configuration tree definition. The thing what I want to achieve is that paths array would be under import key on root array. — Aistis
– Aistis, Commented Sep 21, 2016 at 8:18

Aistis · Accepted Answer · 2016-09-21 08:23:44Z

3

Looks like I forgot to prototype the data structure:

$rootNode
    ->children()
        ->arrayNode('import')
            ->children()
                ->arrayNode('paths')
                    ->prototype('scalar')->end()
                ->end()
            ->end()
        ->end()
    ->end();

answered Sep 21, 2016 at 8:23

Aistis

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3 Comments

Dmitry Malyshenko Over a year ago

Yes, but it could be empty in this case. That's why I asked why did you put cannotBeEmpty()

Aistis Over a year ago

How the TreeBuilder would look if no config is set to config.yml? I mean that the default value would be ['import' => ['paths' => []]]?

Dmitry Malyshenko Over a year ago

I believe root node is still required, but import and paths might be empty. But it's just something very easy to be checked once you've got a code

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