db.models.as_sql()

as_sql(self, compiler, connection)

Responsible for producing the query string and parameters for the expression. The compiler is an SQLCompiler object, which has a compile() method that can be used to compile other expressions. The connection is the connection used to execute the query.

Calling expression.as_sql() is usually incorrect - instead compiler.compile(expression) should be used. The compiler.compile() method will take care of calling vendor-specific methods of the expression.

Custom keyword arguments may be defined on this method if it’s likely that as_vendorname() methods or subclasses will need to supply data to override the generation of the SQL string. See Func.as_sql() for example usage.