nullable environment variables in Symfony

Question

I know that env variables are string only. Symfony 3.4 supports env variables type casting. Is there a way to pass null value through int validator?

.env

DATABASE_PORT=
#I also tried DATABASE_PORT=null, DATABASE_PORT=~

parameters.yml

app.connection.port: '%env(int:DATABASE_PORT)%'
#I also tried env(?int, env(int?

I'm getting an error: "Non-numeric env var "DATABASE_PORT" cannot be cast to int." or "Invalid env(?int:DATABASE_PORT) name: only "word" characters are allowed."

In yml there are ~ or null signs used to pass null, e.g:

app.connection.port: ~

Gregoire Ducharme · Accepted Answer · 2018-04-04T14:34:33.773

1

Someone asked in the doc:

Is it, or will it be possible to define your own operator? Like %env(myDecoder:API_PASSWORD)%, which will decrypt the environment value into something usable.

class MyDecoder implements EnvironmentOperator {
  public function resolve(string $value): string { 
    // magic stuff for decryption 
    return $value;
  }
}

And the answer was:

yes, you just need to create a service that implements EnvProviderInterface and tag it with container.env_provider.

You could create an operator to accept null as an int

edited Apr 04 '18 at 14:34

answered Apr 04 '18 at 09:30

Gregoire Ducharme

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Thanks, that makes sense. I was thinking if it's already implemented by any chance. – karser Apr 04 '18 at 14:32

score 1 · Answer 2 · edited Apr 30 '23 at 00:42

1

Try use fallback param:

app.connection.port: '%env(int:default::DATABASE_PORT)%'

edited Apr 30 '23 at 00:42

Jeremy Caney

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69
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answered Apr 25 '23 at 17:05

Pavel

11
1

nullable environment variables in Symfony

2 Answers2