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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace yii\db\conditions;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\db\ExpressionBuilderInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\db\ExpressionBuilderTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\db\ExpressionInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\db\Query;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class BetweenColumnsConditionBuilder builds objects of [[BetweenColumnsCondition]]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Dmytro Naumenko <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since 2.0.14  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class BetweenColumnsConditionBuilder implements ExpressionBuilderInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use ExpressionBuilderTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Method builds the raw SQL from the $expression that will not be additionally  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * escaped or quoted.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param ExpressionInterface|BetweenColumnsCondition $expression the expression to be built.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $params the binding parameters.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string the raw SQL that will not be additionally escaped or quoted.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function build(ExpressionInterface $expression, array &$params = [])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $operator = $expression->getOperator();  | 
            
                            
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                        $startColumn = $this->escapeColumnName($expression->getIntervalStartColumn(), $params);  | 
            
                            
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                        $endColumn = $this->escapeColumnName($expression->getIntervalEndColumn(), $params);  | 
            
                            
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                        $value = $this->createPlaceholder($expression->getValue(), $params);  | 
            
                            
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                        return "$value $operator $startColumn AND $endColumn";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Prepares column name to be used in SQL statement.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Query|ExpressionInterface|string $columnName  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $params the binding parameters.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function escapeColumnName($columnName, &$params = [])  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($columnName instanceof Query) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            list($sql, $params) = $this->queryBuilder->build($columnName, $params);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return "($sql)";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        } elseif ($columnName instanceof ExpressionInterface) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return $this->queryBuilder->buildExpression($columnName, $params);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        } elseif (strpos($columnName, '(') === false) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return $this->queryBuilder->db->quoteColumnName($columnName);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $columnName;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Attaches $value to $params array and returns placeholder.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param mixed $value  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $params passed by reference  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    protected function createPlaceholder($value, &$params)  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        if ($value instanceof ExpressionInterface) { | 
            
            
                                                        
            
                                    
            
            
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                            return $this->queryBuilder->buildExpression($value, $params);  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        return $this->queryBuilder->bindParam($value, $params);  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: