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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright  Copyright (c) Flipbox Digital Limited  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license    https://github.com/flipboxfactory/craft-element-lists/LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link       https://github.com/flipboxfactory/craft-element-lists/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace flipbox\craft\element\lists\actions\source;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use craft\base\Field;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\craft\ember\actions\ManageTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\craft\ember\helpers\SiteHelper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\craft\element\lists\actions\ResolverTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use flipbox\craft\element\lists\records\Association;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\base\Action;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Flipbox Factory <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since 2.0.0  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                class Associate extends Action  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    use ManageTrait,  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        ResolverTrait;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string $field  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string $source  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param string $target  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param int|null $siteId  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param int|null $sortOrder  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return mixed  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @throws \yii\web\HttpException  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function run(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        string $field,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        string $source,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        string $target,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        int $siteId = null,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        int $sortOrder = null  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Resolve  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $field = $this->resolveField($field);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $source = $this->resolveElement($source);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $target = $this->resolveElement($target);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /** @var Field $field */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $siteId = SiteHelper::ensureSiteId($siteId ?: $source->siteId);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $record = Association::find()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->fieldId($field->id)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->sourceId($source->getId() ?: false)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->targetId($target->getId() ?: false)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->siteId($siteId)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->one();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!$record) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $record = new Association([  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'fieldId' => $field->id,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'sourceId' => $source->getId(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'targetId' => $target->getId(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'siteId' => $siteId  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($sortOrder) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $record->sortOrder = $sortOrder;  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->runInternal($record);  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @inheritdoc  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param Association $record  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @throws \Exception  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function performAction(Association $record): bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $record->save();  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Since your code implements the magic setter
_set, this function will be called for any write access on an undefined variable. You can add the@propertyannotation to your class or interface to document the existence of this variable.Since the property has write access only, you can use the @property-write annotation instead.
Of course, you may also just have mistyped another name, in which case you should fix the error.
See also the PhpDoc documentation for @property.