Single Table Inheritance
Alright, so in order to be able to fetch all the starships at once, we
need to use Doctrine's second type of inheritance: Single Table Inheritance.
With this feature, all entities that are part of the hierarchy are stored in
a single table. This…
Entities, DTO's & The "Central" Object
…too good to be true. It gives us all the
flexibility, in theory, of a custom class, while reusing all the core Doctrine
provider and processor logic. But hold your horses because there are two, albeit
fixable, snags.
Most importantly, we're not allowed to…
Provider: Transforming Entities to DTOs
Let's keep track of the goal. When we first used stateOptions, it triggered the
core Doctrine collection provider to be used. That's great... except that it
returns User entities, meaning that those became the central objects
for the UserApi endpoints. That causes a…
Querying the Database
…text file.
We're going to stop using this MixRepository and instead load these $mixes
from the database.
Ok: to save objects, we leveraged the EntityManagerInterface service, which is
the most important service by far in Doctrine. Whelp, this service can also
query for objects…
Migrations
…run:
symfony console doctrine:migrations:migrate
Say y to confirm and... beautiful! It tells us that it's Migrating up to
that specific version. It seems... like that worked! To make sure, you can
try another bin/console command: symfony console doctrine:query:sql
with…
Configuring our Bundle's Entity
…right now. This
command also shows mapped superclasses, so we need to do some work
to get our Translation class to show up here.
You're probably used to using mapping attributes for your Doctrine entities.
In bundles, it's a bit different. The official…
Refactoring `ObjectTranslator`
…a constructor for this class... and open it up to give us some space.
Now copy the Doctrine-related properties from ObjectTranslator's
constructor ($translationClass and $doctrine) and paste them into our
new constructor:
This paves the way for our next method, public function idFor()…
Reusable Entity->Dto Provider & Processor
Our UserAPI is now a fully functional API resource class! We've got our
EntityToDtoStateProvider, which calls the core state provider from Doctrine, and
that gives us all the good stuff, like querying, filtering, and pagination. Then,
down here, we leverage the MicroMapper system to…
Making Questions owned by Users
Our site has users and these questions are created by those users. So in the
database, each Question needs to be related to the User that created it
via a Doctrine relationship. Right now, if you open src/Entity/Question.php,
that is not the…
Worker Command
…them. That's tragic! Instead, those
messages were sent to the doctrine transport and are waiting patiently inside of
a messenger_messages table.
So... how can we read these back out and process them? We need something that can
fetch each row one-by-one…
File Uploads & Data Fixtures
Open up src/DataFixtures/ArticleFixtures.php. Here's how this works: this function
creates 10 articles whenever we run bin/console doctrine:fixtures:load. It's a cool
helper we created in our Symfony series. But, the setImageFilename() stuff
is now a problem. We know…
Owning Vs Inverse Relations
We need to talk about a very, very important and, honestly, super-confusing part
of Doctrine relations! Listen closely: this is the ugliest thing we need to talk
about. So, let's get through it, put a big beautiful check mark next to it, then…
Fixtures: For some dumb data
…it
there:
To see if it's working, try getting help information on a new doctrine:fixtures:load
console task that comes from the bundle:
php app/console doctrine:fixtures:load --help
We see the help information, so we're ready to write some fixtures…
Data Persister: Encoding the Plain Password
…users, we need to be able to run
some code after API Platform deserializes the JSON into a User object, but
before it gets saved to Doctrine. That code will encode the plainPassword
and set it on the password property.
How can we do that…
Adding the ManyToOne Relation
…to have many Comments... and we want each Comment to
belong to one Article. Forget about Doctrine for a minute: let's think about how
this should look in the database. Because each Comment should belong to one
article, this means that the comment table…
Adding a Comment Entity
Hey friends! I mean, hello fellow space-traveling developer... friends. Welcome,
to part two of our Doctrine tutorial where we talk all about... relationships.
Oh, I love relationships, and there are so many beautiful types in the universe!
Like, the relationship between two old friends…
Dynamic Roles and Canonical Fields
Let's see what this all looks like in the database! To query the user table,
we can actually use the console:
php bin/console doctrine:query:sql 'SELECT * FROM user'
Nice! We inherited a bunch of columns from the base User class, like username…
JOINs!
…do! I mean, a query isn't truly interesting unless you're
joining across tables to do some query Kung fu. Doctrine makes JOINs really
easy - it's one of my favorite features! Heck, they're so easy that I think
it confuses people. Let…
An Aside: Dependency Injection Parameters
…forms stuff and open config.yml. Under
the doctrine key, we see a bunch of percent sign values:
# app/config/config.yml
# ...
doctrine:
Whenever you see something surrounded by two percent signs in a config file,
it’s a parameter. Parameters are like variables: you…
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