Django Database Get value

The contents of the database table are as follows:

Models. Step_Type.objects.values ()
Gets the qualified value in the model, actually querying all the values in the table, such as the query result:
<queryset [{' id ': 1, ' step_type ': ' comment '}, {' id ': 2, ' step_type ': ' Call '}, {' id ': 3, ' step_type ': ' Log '}]>

Models. Step_Type.objects.values (). filter (id=1) [0]

Getting the first value that matches the condition results in the following:
<queryset [{' id ': 1, ' step_type ': ' Comment '}]>

Models. Step_Type.objects.values ("Step_type"). Filter (id=1)
Get field values

<queryset [{' Step_type ': ' Comment '}]>

Django Database Get value