v.0.1
This commit is contained in:
227
vendor/illuminate/database/Concerns/BuildsQueries.php
vendored
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227
vendor/illuminate/database/Concerns/BuildsQueries.php
vendored
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<?php
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namespace Illuminate\Database\Concerns;
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use Illuminate\Container\Container;
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use Illuminate\Pagination\LengthAwarePaginator;
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use Illuminate\Pagination\Paginator;
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trait BuildsQueries
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{
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/**
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* Chunk the results of the query.
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*
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* @param int $count
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* @param callable $callback
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* @return bool
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*/
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public function chunk($count, callable $callback)
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{
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$this->enforceOrderBy();
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$page = 1;
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do {
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// We'll execute the query for the given page and get the results. If there are
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// no results we can just break and return from here. When there are results
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// we will call the callback with the current chunk of these results here.
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$results = $this->forPage($page, $count)->get();
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$countResults = $results->count();
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if ($countResults == 0) {
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break;
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}
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// On each chunk result set, we will pass them to the callback and then let the
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// developer take care of everything within the callback, which allows us to
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// keep the memory low for spinning through large result sets for working.
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if ($callback($results, $page) === false) {
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return false;
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}
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unset($results);
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$page++;
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} while ($countResults == $count);
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return true;
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}
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/**
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* Execute a callback over each item while chunking.
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*
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* @param callable $callback
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* @param int $count
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* @return bool
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*/
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public function each(callable $callback, $count = 1000)
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{
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return $this->chunk($count, function ($results) use ($callback) {
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foreach ($results as $key => $value) {
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if ($callback($value, $key) === false) {
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return false;
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}
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}
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});
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}
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/**
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* Chunk the results of a query by comparing IDs.
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*
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* @param int $count
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* @param callable $callback
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* @param string|null $column
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* @param string|null $alias
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* @return bool
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*/
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public function chunkById($count, callable $callback, $column = null, $alias = null)
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{
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$column = $column ?? $this->defaultKeyName();
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$alias = $alias ?? $column;
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$lastId = null;
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do {
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$clone = clone $this;
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// We'll execute the query for the given page and get the results. If there are
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// no results we can just break and return from here. When there are results
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// we will call the callback with the current chunk of these results here.
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$results = $clone->forPageAfterId($count, $lastId, $column)->get();
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$countResults = $results->count();
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if ($countResults == 0) {
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break;
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}
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// On each chunk result set, we will pass them to the callback and then let the
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// developer take care of everything within the callback, which allows us to
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// keep the memory low for spinning through large result sets for working.
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if ($callback($results) === false) {
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return false;
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}
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$lastId = $results->last()->{$alias};
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unset($results);
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} while ($countResults == $count);
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return true;
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}
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/**
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* Execute a callback over each item while chunking by ID.
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*
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* @param callable $callback
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* @param int $count
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* @param string|null $column
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* @param string|null $alias
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* @return bool
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*/
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public function eachById(callable $callback, $count = 1000, $column = null, $alias = null)
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{
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return $this->chunkById($count, function ($results) use ($callback) {
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foreach ($results as $key => $value) {
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if ($callback($value, $key) === false) {
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return false;
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}
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}
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}, $column, $alias);
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}
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/**
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* Execute the query and get the first result.
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*
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* @param array|string $columns
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* @return \Illuminate\Database\Eloquent\Model|object|static|null
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*/
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public function first($columns = ['*'])
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{
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return $this->take(1)->get($columns)->first();
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}
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/**
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* Apply the callback's query changes if the given "value" is true.
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*
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* @param mixed $value
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* @param callable $callback
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* @param callable|null $default
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* @return mixed|$this
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*/
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public function when($value, $callback, $default = null)
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{
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if ($value) {
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return $callback($this, $value) ?: $this;
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} elseif ($default) {
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return $default($this, $value) ?: $this;
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}
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return $this;
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}
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/**
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* Pass the query to a given callback.
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*
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* @param callable $callback
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* @return $this
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*/
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public function tap($callback)
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{
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return $this->when(true, $callback);
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}
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/**
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* Apply the callback's query changes if the given "value" is false.
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*
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* @param mixed $value
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* @param callable $callback
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* @param callable|null $default
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* @return mixed|$this
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*/
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public function unless($value, $callback, $default = null)
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{
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if (! $value) {
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return $callback($this, $value) ?: $this;
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} elseif ($default) {
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return $default($this, $value) ?: $this;
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}
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return $this;
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}
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/**
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* Create a new length-aware paginator instance.
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*
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* @param \Illuminate\Support\Collection $items
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* @param int $total
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* @param int $perPage
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* @param int $currentPage
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* @param array $options
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* @return \Illuminate\Pagination\LengthAwarePaginator
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*/
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protected function paginator($items, $total, $perPage, $currentPage, $options)
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{
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return Container::getInstance()->makeWith(LengthAwarePaginator::class, compact(
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'items', 'total', 'perPage', 'currentPage', 'options'
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));
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}
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/**
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* Create a new simple paginator instance.
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*
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* @param \Illuminate\Support\Collection $items
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* @param int $perPage
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* @param int $currentPage
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* @param array $options
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* @return \Illuminate\Pagination\Paginator
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*/
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protected function simplePaginator($items, $perPage, $currentPage, $options)
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{
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return Container::getInstance()->makeWith(Paginator::class, compact(
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'items', 'perPage', 'currentPage', 'options'
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));
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}
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}
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292
vendor/illuminate/database/Concerns/ManagesTransactions.php
vendored
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292
vendor/illuminate/database/Concerns/ManagesTransactions.php
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@ -0,0 +1,292 @@
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<?php
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namespace Illuminate\Database\Concerns;
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use Closure;
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use Throwable;
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trait ManagesTransactions
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{
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/**
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* Execute a Closure within a transaction.
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*
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* @param \Closure $callback
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* @param int $attempts
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* @return mixed
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*
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* @throws \Throwable
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*/
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public function transaction(Closure $callback, $attempts = 1)
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{
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for ($currentAttempt = 1; $currentAttempt <= $attempts; $currentAttempt++) {
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$this->beginTransaction();
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// We'll simply execute the given callback within a try / catch block and if we
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// catch any exception we can rollback this transaction so that none of this
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// gets actually persisted to a database or stored in a permanent fashion.
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try {
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$callbackResult = $callback($this);
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}
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// If we catch an exception we'll rollback this transaction and try again if we
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// are not out of attempts. If we are out of attempts we will just throw the
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// exception back out and let the developer handle an uncaught exceptions.
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catch (Throwable $e) {
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$this->handleTransactionException(
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$e, $currentAttempt, $attempts
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);
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continue;
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}
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try {
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if ($this->transactions == 1) {
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$this->getPdo()->commit();
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}
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$this->transactions = max(0, $this->transactions - 1);
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} catch (Throwable $e) {
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$this->handleCommitTransactionException(
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$e, $currentAttempt, $attempts
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);
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continue;
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}
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$this->fireConnectionEvent('committed');
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return $callbackResult;
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}
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}
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/**
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* Handle an exception encountered when running a transacted statement.
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*
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* @param \Throwable $e
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* @param int $currentAttempt
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* @param int $maxAttempts
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* @return void
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*
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* @throws \Throwable
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*/
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protected function handleTransactionException(Throwable $e, $currentAttempt, $maxAttempts)
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{
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// On a deadlock, MySQL rolls back the entire transaction so we can't just
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// retry the query. We have to throw this exception all the way out and
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// let the developer handle it in another way. We will decrement too.
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if ($this->causedByConcurrencyError($e) &&
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$this->transactions > 1) {
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$this->transactions--;
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throw $e;
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}
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// If there was an exception we will rollback this transaction and then we
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// can check if we have exceeded the maximum attempt count for this and
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// if we haven't we will return and try this query again in our loop.
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$this->rollBack();
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if ($this->causedByConcurrencyError($e) &&
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$currentAttempt < $maxAttempts) {
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return;
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}
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throw $e;
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}
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/**
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* Start a new database transaction.
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*
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* @return void
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*
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* @throws \Throwable
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*/
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public function beginTransaction()
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{
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$this->createTransaction();
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$this->transactions++;
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$this->fireConnectionEvent('beganTransaction');
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}
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/**
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* Create a transaction within the database.
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*
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* @return void
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*
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* @throws \Throwable
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*/
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protected function createTransaction()
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{
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if ($this->transactions == 0) {
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$this->reconnectIfMissingConnection();
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try {
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$this->getPdo()->beginTransaction();
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} catch (Throwable $e) {
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$this->handleBeginTransactionException($e);
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}
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} elseif ($this->transactions >= 1 && $this->queryGrammar->supportsSavepoints()) {
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$this->createSavepoint();
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}
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}
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/**
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* Create a save point within the database.
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*
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* @return void
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*
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* @throws \Throwable
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*/
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protected function createSavepoint()
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{
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$this->getPdo()->exec(
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$this->queryGrammar->compileSavepoint('trans'.($this->transactions + 1))
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);
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}
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/**
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* Handle an exception from a transaction beginning.
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*
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* @param \Throwable $e
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* @return void
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*
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* @throws \Throwable
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*/
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protected function handleBeginTransactionException(Throwable $e)
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{
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if ($this->causedByLostConnection($e)) {
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$this->reconnect();
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$this->getPdo()->beginTransaction();
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} else {
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throw $e;
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}
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}
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/**
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* Commit the active database transaction.
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*
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* @return void
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*
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* @throws \Throwable
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*/
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public function commit()
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{
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if ($this->transactions == 1) {
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$this->getPdo()->commit();
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}
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$this->transactions = max(0, $this->transactions - 1);
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$this->fireConnectionEvent('committed');
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}
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/**
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* Handle an exception encountered when committing a transaction.
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*
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* @param \Throwable $e
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* @param int $currentAttempt
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* @param int $maxAttempts
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* @return void
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*
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* @throws \Throwable
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*/
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protected function handleCommitTransactionException(Throwable $e, $currentAttempt, $maxAttempts)
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{
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$this->transactions = max(0, $this->transactions - 1);
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if ($this->causedByConcurrencyError($e) &&
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$currentAttempt < $maxAttempts) {
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return;
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}
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if ($this->causedByLostConnection($e)) {
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$this->transactions = 0;
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}
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throw $e;
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}
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/**
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* Rollback the active database transaction.
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*
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* @param int|null $toLevel
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* @return void
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*
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* @throws \Throwable
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*/
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public function rollBack($toLevel = null)
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{
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// We allow developers to rollback to a certain transaction level. We will verify
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// that this given transaction level is valid before attempting to rollback to
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// that level. If it's not we will just return out and not attempt anything.
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$toLevel = is_null($toLevel)
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? $this->transactions - 1
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: $toLevel;
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if ($toLevel < 0 || $toLevel >= $this->transactions) {
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return;
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}
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// Next, we will actually perform this rollback within this database and fire the
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// rollback event. We will also set the current transaction level to the given
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// level that was passed into this method so it will be right from here out.
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try {
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$this->performRollBack($toLevel);
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} catch (Throwable $e) {
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$this->handleRollBackException($e);
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}
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$this->transactions = $toLevel;
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$this->fireConnectionEvent('rollingBack');
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}
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/**
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* Perform a rollback within the database.
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*
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* @param int $toLevel
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* @return void
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*
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* @throws \Throwable
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*/
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protected function performRollBack($toLevel)
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{
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if ($toLevel == 0) {
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$this->getPdo()->rollBack();
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} elseif ($this->queryGrammar->supportsSavepoints()) {
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$this->getPdo()->exec(
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$this->queryGrammar->compileSavepointRollBack('trans'.($toLevel + 1))
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);
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}
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}
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/**
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* Handle an exception from a rollback.
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*
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* @param \Throwable $e
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* @return void
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*
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* @throws \Throwable
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*/
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protected function handleRollBackException(Throwable $e)
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{
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if ($this->causedByLostConnection($e)) {
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$this->transactions = 0;
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}
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throw $e;
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}
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/**
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* Get the number of active transactions.
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*
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* @return int
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*/
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public function transactionLevel()
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{
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return $this->transactions;
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}
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}
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