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[DOCUMENTATION][DB] Fix database examples and documentation

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This commit is contained in:
Hugo Sales
2021-09-16 14:01:51 +01:00
committed by Diogo Peralta Cordeiro
parent ee7721da96
commit eda3a5ffb6
1 changed files with 27 additions and 19 deletions
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46
docs/developer/src/database.md
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@@ -29,7 +29,7 @@ in well defined [units of work](https://www.doctrine-project.org/projects/doctri
Work with your objects and modify them as usual. For
the most part, Doctrine ORM already takes care of proper [transaction demarcation](https://www.doctrine-project.org/projects/doctrine-orm/en/current/reference/transactions-and-concurrency.html#transaction-demarcation)
for you: All the write operations (INSERT/UPDATE/DELETE)
are queued until _EntityManager#flush()_ is invoked which
are queued until `EntityManager#flush()` is invoked which
wraps all of these changes in a single transaction.
Declaring an Entity
@@ -43,27 +43,23 @@ use App\Core\Entity;
use DateTimeInterface;
class AttachmentEmbed extends Entity
{
private int $attachment_id;
private ?string $mimetype;
private ?string $filename;
private ?string $media_url;
private \DateTimeInterface $modified;
/* Getters and Setters */
// These tags are meant to be literally included and will be populated with the appropriate fields, setters and getters by `bin/generate_entity_fields`
// {{{ Autocode
// }}} Autocode
public static function schemaDef()
{
return [
'name' => 'attachment_embed',
'fields' => [
'attachment_id' => ['type' => 'int', 'not null' => true, 'description' => 'Embed for that URL/file'],
'attachment_id' => ['type' => 'int', 'not null' => true, 'foreign key' => true, 'target' => 'Attachment.id', 'multiplicity' => 'one to one', 'description' => 'Embed for that URL/file'],
'mimetype' => ['type' => 'varchar', 'length' => 50, 'description' => 'mime type of resource'],
'filename' => ['type' => 'varchar', 'length' => 191, 'description' => 'file name of resource when available'],
'media_url' => ['type' => 'text', 'description' => 'URL for this Embed resource when applicable (photo, link)'],
'modified' => ['type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'],
],
'primary key' => ['attachment_id'],
'foreign keys' => [
'attachment_embed_attachment_id_fkey' => ['attachment', ['attachment_id' => 'id']],
],
];
}
}
@@ -73,16 +69,26 @@ Retrieving an entity
--------------------
```php
$res = self::findBy('attachment_embed', ['attachment_id' => $attachment->getId(), null, 1, null);
if (count($res) === 1) {
$object = $res[0];
use App\Core\DB\DB;
use App\Util\Exception\NotFoundException;
use App\Util\Exception\DuplicateFoundException;
/// ...
try {
$object = DB::findOneBy('attachment_embed', ['attachment_id' => $attachment->getId()]);
} catch (NotFoundException) {
// Not found
} catch (DuplicateFoundException) {
// Integrety compromised
}
```
Deleting an Entity
------------------
```php
$object->delete();
DB::delete($object);
```
Creating an Entity
@@ -93,8 +99,10 @@ DB::persist(Entity\AttachmentEmbed::create($embed_data));
DB::flush();
```
Querying the database
---------------------
When the ORM isn't powerful enough to satisfy your needs,
you can resort to [Doctrine QueryBuilder](https://www.doctrine-project.org/projects/doctrine-orm/en/current/reference/query-builder.html#the-querybuilder).
Querying the database --------------------- When the ORM isn't
powerful enough to satisfy your needs, you can resort to
[Doctrine Query Language](https://www.doctrine-project.org/projects/doctrine-orm/en/2.9/reference/dql-doctrine-query-language.html),
which is preferred and has been extended so you can use table names
rather than class names, or
[Doctrine QueryBuilder](https://www.doctrine-project.org/projects/doctrine-orm/en/current/reference/query-builder.html#the-querybuilder).