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Note about upgrading: Doctrine uses static and runtime mechanisms to raise
awareness about deprecated code.
- Use of `@deprecated` docblock that is detected by IDEs (like PHPStorm) or
Static Analysis tools (like Psalm, phpstan)
- Use of our low-overhead runtime deprecation API, details:
https://github.com/doctrine/deprecations/
# Upgrade to 2.2
## Deprecated string representation of sort order
Criteria orderings direction is now represented by the
`Doctrine\Common\Collection\Order` enum.
As a consequence:
- `Criteria::ASC` and `Criteria::DESC` are deprecated in favor of
`Order::Ascending` and `Order::Descending`, respectively.
- `Criteria::getOrderings()` is deprecated in favor of `Criteria::orderings()`,
which returns `array<string, Order>`.
- `Criteria::orderBy()` accepts `array<string, string|Order>`, but passing
anything other than `array<string, Order>` is deprecated.
# Upgrade to 2.0
## BC breaking changes
Native parameter types were added. Native return types will be added in 3.0.x
As a consequence, some signatures were changed and will have to be adjusted in sub-classes.
Note that in order to keep compatibility with both 1.x and 2.x versions,
extending code would have to omit the added parameter types.
This would only work in PHP 7.2+ which is the first version featuring
[parameter widening](https://wiki.php.net/rfc/parameter-no-type-variance).
It is also recommended to add return types according to the tables below
You can find a list of major changes to public API below.
### Doctrine\Common\Collections\Collection
| 1.0.x | 3.0.x |
|---------------------------------:|:-------------------------------------------------|
| `add($element)` | `add(mixed $element): void` |
| `clear()` | `clear(): void` |
| `contains($element)` | `contains(mixed $element): bool` |
| `isEmpty()` | `isEmpty(): bool` |
| `removeElement($element)` | `removeElement(mixed $element): bool` |
| `containsKey($key)` | `containsKey(string\|int $key): bool` |
| `get()` | `get(string\|int $key): mixed` |
| `getKeys()` | `getKeys(): array` |
| `getValues()` | `getValues(): array` |
| `set($key, $value)` | `set(string\|int $key, $value): void` |
| `toArray()` | `toArray(): array` |
| `first()` | `first(): mixed` |
| `last()` | `last(): mixed` |
| `key()` | `key(): int\|string\|null` |
| `current()` | `current(): mixed` |
| `next()` | `next(): mixed` |
| `exists(Closure $p)` | `exists(Closure $p): bool` |
| `filter(Closure $p)` | `filter(Closure $p): self` |
| `forAll(Closure $p)` | `forAll(Closure $p): bool` |
| `map(Closure $func)` | `map(Closure $func): self` |
| `partition(Closure $p)` | `partition(Closure $p): array` |
| `indexOf($element)` | `indexOf(mixed $element): int\|string\|false` |
| `slice($offset, $length = null)` | `slice(int $offset, ?int $length = null): array` |
| `count()` | `count(): int` |
| `getIterator()` | `getIterator(): \Traversable` |
| `offsetSet($offset, $value)` | `offsetSet(mixed $offset, mixed $value): void` |
| `offsetUnset($offset)` | `offsetUnset(mixed $offset): void` |
| `offsetExists($offset)` | `offsetExists(mixed $offset): bool` |
### Doctrine\Common\Collections\AbstractLazyCollection
| 1.0.x | 3.0.x |
|------------------:|:------------------------|
| `isInitialized()` | `isInitialized(): bool` |
| `initialize()` | `initialize(): void` |
| `doInitialize()` | `doInitialize(): void` |
### Doctrine\Common\Collections\ArrayCollection
| 1.0.x | 3.0.x |
|------------------------------:|:--------------------------------------|
| `createFrom(array $elements)` | `createFrom(array $elements): static` |
| `__toString()` | `__toString(): string` |
### Doctrine\Common\Collections\Criteria
| 1.0.x | 3.0.x |
|------------------------------------------:|:--------------------------------------------|
| `where(Expression $expression): self` | `where(Expression $expression): static` |
| `andWhere(Expression $expression): self` | `andWhere(Expression $expression): static` |
| `orWhere(Expression $expression): self` | `orWhere(Expression $expression): static` |
| `orderBy(array $orderings): self` | `orderBy(array $orderings): static` |
| `setFirstResult(?int $firstResult): self` | `setFirstResult(?int $firstResult): static` |
| `setMaxResult(?int $maxResults): self` | `setMaxResults(?int $maxResults): static` |
### Doctrine\Common\Collections\Selectable
| 1.0.x | 3.0.x |
|-------------------------------:|:-------------------------------------------|
| `matching(Criteria $criteria)` | `matching(Criteria $criteria): Collection` |
# Upgrade to 1.7
## Deprecated null first result
Passing null as `$firstResult` to
`Doctrine\Common\Collections\Criteria::__construct()` and to
`Doctrine\Common\Collections\Criteria::setFirstResult()` is deprecated.
Use `0` instead.
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