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<?php |
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/** |
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* Phinx |
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* |
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* (The MIT license) |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated * documentation files (the "Software"), to |
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* deal in the Software without restriction, including without limitation the |
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
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* sell copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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* IN THE SOFTWARE. |
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*/ |
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namespace Phinx\Db\Util; |
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/** |
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* Contains all the information for running an ALTER command for a table, |
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* and any post-steps required after the fact. |
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*/ |
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class AlterInstructions |
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{ |
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/** |
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* @var string[] The SQL snippets to be added to an ALTER instruction |
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*/ |
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protected $alterParts = []; |
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/** |
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* @var mixed[] The SQL commands to be executed after the ALTER instruction |
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*/ |
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protected $postSteps = []; |
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/** |
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* Constructor |
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* |
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* @param array $alterParts SQL snipets to be added to a single ALTER instruction per table |
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* @param array $postSteps SQL commands to be executed after the ALTER instruction |
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*/ |
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public function __construct(array $alterParts = [], array $postSteps = []) |
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{ |
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$this->alterParts = $alterParts; |
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$this->postSteps = $postSteps; |
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} |
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/** |
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* Adds another parst for the single ALTER instruction |
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* |
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* @param string $part The SQL snipped to add as part of the ALTER instruction |
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* @return void |
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*/ |
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public function addAlter($part) |
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{ |
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$this->alterParts[] = $part; |
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} |
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/** |
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* Adds a SQL command to be eecuted after the ALTER instruction. |
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* This method allows a callable, with will get an empty array as state |
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* for the first time and will pass the return value of the callable to |
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* the next callable, if present. |
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* |
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* This allows to keep a single state across callbacks. |
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* |
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* @param string|callable $sql The SQL to run after, or a callable to execute |
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* @return void |
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*/ |
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public function addPostStep($sql) |
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{ |
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$this->postSteps[] = $sql; |
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} |
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/** |
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* Returns the alter SQL snippets |
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* |
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* @return string[] |
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*/ |
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public function getAlterParts() |
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{ |
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return $this->alterParts; |
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} |
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/** |
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* Returns the SQL commands to run after the ALTER instrunction |
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* |
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* @return mixed[] |
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*/ |
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public function getPostSteps() |
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{ |
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return $this->postSteps; |
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} |
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/** |
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* Merges another AlterInstructions object to this one |
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* |
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* @param AlterInstructions $other The other collection of instructions to merge in |
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* @return void |
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*/ |
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public function merge(AlterInstructions $other) |
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{ |
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$this->alterParts = array_merge($this->alterParts, $other->getAlterParts()); |
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$this->postSteps = array_merge($this->postSteps, $other->getPostSteps()); |
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} |
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/** |
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* Executes the ALTER instruction and all of the post steps. |
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* |
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* @param string $alterTemplate The template for the alter instruction |
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* @param callable $executor The function to be used to execute all instructions |
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* @return void |
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*/ |
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public function execute($alterTemplate, callable $executor) |
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{ |
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if ($this->alterParts) { |
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$alter = sprintf($alterTemplate, implode(', ', $this->alterParts)); |
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$executor($alter); |
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} |
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$state = []; |
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foreach ($this->postSteps as $instruction) { |
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if (is_callable($instruction)) { |
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$state = $instruction($state); |
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continue; |
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} |
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$executor($instruction); |
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} |
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} |
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} |
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This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.