SqlAlchemy/mysql Optional Where clause

I have below mentioned method with an optional parameter: def _customer_resources_details(customer_id=”): try: res = session.query(DbObjects.ResourceProperty.resource_id,DivvyDbObjects.ResourceProperty.name) \ .filter(DbObjects.ResourceProperty.name ==’customerid’).filter(DbObjects.ResourceProperty.value == customer_id).all() return res except Exception as e: logger.error(‘_customer_resources_details ‘ + str(e)) So, when customer_id is passed , I want to filter the table by both where clause/filter conditions. And, when customer_id is not passed, I want…

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Using a comma as a delimiter, between three strings, in a txt file. But some of the lines in the file have a commas in the second string

There is a file.txt that contains: Country,Province/State,City So I wanted to use “,” as my delimiter. However, some lines of this file have: Country,”Name1 and Name2, Province of”,City So using a comma as a delimiter would not work as the above example as a comma in the Province name. This is my code: String path…

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Hibernate query works with value placed in query but not as a parameter

My question is: why the following query work? String hql = “select sum(total) from Sale s where s.customerType = ‘LOYAL’ and s.customer.id = 4”; Query query = session.createQuery(hql); System.out.println(query.getSingleResult()); // prints 1500.0 (exact value) With the query above Hibernate executes the following SQL (which is fine): select sum(sale0_.total) as col_0_0_ from sales sale0_ where sale0_.customer_type=’LOYAL’…

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