How to configure Doctrine to use yaml mapping on Symfony 4

Question

I'm new to Symfony 4

I use Doctrine an I want to use yaml entity mapping. So i configured the file doctrine.yaml and change type:annotation to type:yml.

And when I tried php bin/console make:entity, there is no yaml mapping file generated linked to this entity

this is my doctrine.yaml file:

parameters:
    # Adds a fallback DATABASE_URL if the env var is not set.
    # This allows you to run cache:warmup even if your
    # environment variables are not available yet.
    # You should not need to change this value.
    env(DATABASE_URL): ''

doctrine:
    dbal:
        # configure these for your database server
        driver: 'pdo_mysql'
        server_version: '5.7'
        charset: utf8mb4

        # With Symfony 3.3, remove the `resolve:` prefix
        url: '%env(resolve:DATABASE_URL)%'
    orm:
        auto_generate_proxy_classes: '%kernel.debug%'
        naming_strategy: doctrine.orm.naming_strategy.underscore
        auto_mapping: true
        mappings:
            App:
                is_bundle: false
                type: yml
                dir: '%kernel.project_dir%/src/Entity'
                prefix: 'App\Entity'
                alias: App

Answer 1

An example of mapping following your needs:

Change the file name including the "orm" text doctrine.orm.yaml, and take a look at the dir option in the example below (that follows your needs):

App:
    is_bundle: false
    type: yml
    # "dir" in this case must be pointed where are stored your doctrine files (can be anywhere inside the project dir)
    dir: "%kernel.project_dir%/config/doctrine"
    prefix: App\Entity

Reference: Doctrine yaml mapping (v2.6 current)