Question

I want to filter a class by providing a list

first_name = ['John', 'Lian']
employees = Employee.objects.filter(firstname in first_name)

In real case, the first_name is generated on the fly.

And now I received that 'global name 'firstname' is not defined' error.
I’m sure that there’s a field in Employee class called firstname.

How can I fix this?
Thanks for your help!

Model class

class Employee(models.Model):

    status= fields.BooleanField(default=True)
    title = fields.CharField(max_length=128)
    first_name = models.ManyToManyField('First_name', blank=True, null=True)

Notice: This isn’t real model but can represent this issue.

Answer 1

Use the next line:

employees = Employee.objects.filter(firstname__in = first_name)

If first_name field is ManyToManyField (and First_name model contains field “name”), you should try something like this:

first_names = ['John', 'Lian']
employees = Employee.objects.filter(first_name__title__in = first_names)

Another way:

first_names = ['John', 'Lian']
instances = [First_name.objects.get(title = title) for title in first_names]
employees = Employee.objects.filter(first_name__in = instances)