[Form] Fixed regression causing invalid "WHERE id IN ()" statements
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@ -204,6 +204,16 @@ class EntityChoiceList extends ObjectChoiceList
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*/
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public function getChoicesForValues(array $values)
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{
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// Performance optimization
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// Also prevents the generation of "WHERE id IN ()" queries through the
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// entity loader. At least with MySQL and on the development machine
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// this was tested on, no exception was thrown for such invalid
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// statements, consequently no test fails when this code is removed.
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// https://github.com/symfony/symfony/pull/8981#issuecomment-24230557
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if (empty($values)) {
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return array();
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}
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if (!$this->loaded) {
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// Optimize performance in case we have an entity loader and
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// a single-field identifier
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@ -247,6 +257,11 @@ class EntityChoiceList extends ObjectChoiceList
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*/
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public function getValuesForChoices(array $entities)
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{
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// Performance optimization
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if (empty($entities)) {
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return array();
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}
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if (!$this->loaded) {
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// Optimize performance for single-field identifiers. We already
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// know that the IDs are used as values
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@ -282,6 +297,11 @@ class EntityChoiceList extends ObjectChoiceList
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*/
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public function getIndicesForChoices(array $entities)
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{
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// Performance optimization
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if (empty($entities)) {
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return array();
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}
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if (!$this->loaded) {
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// Optimize performance for single-field identifiers. We already
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// know that the IDs are used as indices
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@ -317,6 +337,11 @@ class EntityChoiceList extends ObjectChoiceList
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*/
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public function getIndicesForValues(array $values)
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{
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// Performance optimization
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if (empty($values)) {
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return array();
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}
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if (!$this->loaded) {
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// Optimize performance for single-field identifiers.
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