Behat "Parent definition "sylius.behat.page.admin.crud.create" does not exist"

[Symfony\Component\DependencyInjection\Exception\RuntimeException]
  Service "app.behat.page.create_book": Parent definition "sylius.behat.page.admin.crud.create" does not exist.

If you recieve this error, try to move your app.behat.page.create_book service from services.yml to contexts.yml.

Symfony Validation not working at all

Check do you persist or flush on the FormEvents states.

sylius disable all E-mails sending/fix server error after checkout on prod

add in config_prod.yml:

swiftmailer:    disable_delivery: true

Behat no scenarios no steps fix

Remove from your *.feature file : (colon) symbols after Given/When/And.

Symfony how to debug DQL

use command doctrine:query:dql

For example, php bin/console doctrine:query:dql "SELECT a FROM AppBundle:Attachment a"

Symfony assets don't create files in web/bundles

After running asset:install, Asset tries to add needed files in web/bundles directory, and then fastyle deletes them. Same behavior appears with --symlink, --relative and other asset directory path.

Solution to me was to update Asset bundle with Composer.

Sylius how to create admin account

Even you have reset database, run sylius:install:setup, where you can set email and password, and it doesn't create DB with sample data.