I am about to migrate an old Symfony 1.4 Application to Symfony 2.2. I think this should be at least a bit planed. So I have several Questions, maybe you can help me:
doctrine:mapping:import but I think this is not a good idea. Do you have good experiences with this command?It's not very important to migrate the old data, because the App went inactive and could be started from scratch. However I am hoping to save some time in creation. So it's more about functionality migration.
To answer your questions in turn :
Is there maybe a good Tutorial out there (I didn't found one)
There is no documentation on migrating between versions as its not really possible - the 2 frameworks are very very different - i suggest you almost need to start again. Read this on the differences between the 2 versions
Is it possible to reuse my old schema.yml and fixtures?
You can import your database structure - but not from schema.yml - direct from the database. You cannot reuse your old fixtures - fixtures are still available though
I know about doctrine:mapping:import but I think this is not a good idea. Do you have good experiences with this command?
Its worked fine for me when I migrated my application from 1.4 to 2.1/2.2 - everything was picked up objects, properties and relationships - i recommend using it
I would say however that the documentation for Symfony (both 1.4 and 2) is excellent - the books and cookbooks are very well written and easy to read.