A simple query looks like this 

```
User.query.filter(User.name == 'admin')

```

In my code, I need to check the parameters that are being passed and then filter the results from the database based on the parameter. 

For example, if the User table contains columns like username, location and email, the request parameter can contain either one of them or can have combination of columns. Instead of checking each parameter as shown below and chaining the filter, I'd like to create one dynamic query string which can be passed to one filter and can get the results back. I'd like to create a separate function which will evaluate all parameters and will generate a query string. Once the query string is generated, I can pass that query string object and get the desired result. I want to avoid using RAW SQL query as it defeats the purpose of using ORM.

```
if location:
    User.query.filter(User.name == 'admin', User.location == location)
elif email:
    User.query.filter(User.email == email)

```