Python 在SQLALCHEMY中使用或从多个联接表中筛选属性会生成额外的实体

如中所述，sqlalchemy“filter”和“filter_by”filters only是调用Query.join（）的最后一个实体

我想要一个类似以下的查询：

SELECT sale.*
FROM sale JOIN sale_transactions ON sale.id = sale_transactions.sale_id 
JOIN customer ON customer.id = sale.customer_id 
JOIN product ON product.id = sale_transactions.product_id
WHERE (sale.description LIKE '%something%' OR product.name LIKE '%something%' OR customer.name LIKE '%something%')
AND sale.date >= 'someDate' AND sale.date <= 'someOtherDate'

为此，我编写了以下代码：

query = Sale.query.join(Customer)
query = query.join(SaleTransactions, Product)
query = query.filter(Sale.description.like('%something%') | Product.name.like('%something%') | Customer.name.like('%something%'))
query = query.filter(Sale.date >= datetime.today(), Sale.date <= datetime.today())

query=Sale.query.join（客户）
query=query.join（销售交易、产品）
query=query.filter（Sale.description.like（'%something%'））| Product.name.like（'%something%'））| Customer.name.like（'%something%'））
query=query.filter（Sale.date>=datetime.today（），Sale.date='someDate'和Sale.date
query = Sale.query.join(Customer)
query = query.join(SaleTransactions, Product)
query = query.filter(Sale.description.like('%something%') | Product.name.like('%something%') | Customer.name.like('%something%'))
query = query.filter(Sale.date >= datetime.today(), Sale.date <= datetime.today())

SELECT sale.*
FROM customer, sale JOIN sale_transactions ON sale.id = sale_transactions.sale_id 
JOIN customer ON customer.id = sale.customer_id 
JOIN product ON product.id = sale_transactions.product_id
WHERE (sale.description LIKE '%something%' OR product.name LIKE '%something%' OR customer.name LIKE '%something%')
AND sale.date >= 'someDate' AND sale.date <= 'someOtherDate'