Django Model.objects.all() 没有给出所有对象

Question

In my Django model I have 2 field. When I execute below code it just prints the resolution field. How can I get the all fields data in a list?

x = ResolutionsModel.objects.all()
for i in x:
    print(i)

models.py

class ResolutionsModel(models.Model):
    resolution = models.TextField(max_length=30,blank=True)
    act_abbreviation = models.TextField(max_length=30)


    def __str__(self):
        return self.resolution

Answer 1

So your model says that to represent an instance of itself as a string it should use the value of resolution . So by printing an instance, that's what you're getting - the value of resolution .

If you pass your queryset to a template you could output the values from all the fields.

For the purposes of your test in python you'd have to specifically include each field;

x = ResolutionsModel.objects.all()
for i in x:
    print(i.resolution)
    print(i.act_abbreviation)

If you actually want to get data in a list, you might want to read about how to use values_list on a queryset; https://docs.djangoproject.com/en/4.0/ref/models/querysets/#values-list

For the purpose of getting to know django you could also adapt your str method;

    def __str__(self):
        return f"{self.resolution}, {self.act_abbreviation}"

Answer 2

In your case:

x = ResolutionsModel.objects.all()

The x here is a query set, which returns a bunch of entries from data base, each entry is a database entry:

for i in x:
    print(i)

i # is a database entry, you can access i.resolution & i.act_abbreviation at each loop.

In the end, everything is an object.