Filter out the repeated items of my queryset

Question

In my Django project, when I query a QuerySet list, there have 5 same item unexpectedly, you can check the below snapshot.
if this is a Set, there should only have two items: (SE01-A3, SE01-A4)

this is my part of my test code:

qs = qs.annotate(letters=Substr('name', 1, 6), 
length=Length('name')).order_by('letters', 'length', 'name') # you can ignore this sort code.

    from django.forms.models import model_to_dict

    for a_qs in qs:
        jsonstr = model_to_dict(a_qs)

        print(jsonstr)

the output of the print(jsonstr):

{'physical_server_model': 5, 'switchesport': 60, 'whmcs_tblorders_id': None, 'expire_time': datetime.datetime(2018, 6, 30, 16, 0, tzinfo=<UTC>), 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 26, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': 126, 'name': 'SE01-A3', 'pay_time': datetime.datetime(2018, 4, 30, 16, 0, tzinfo=<UTC>), 'switches': 3, 'ipmi_addr': '172.16.30.3', 'ipmi_pwd': None, 'desc': 'ip: 43.243.33.25 【As】', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}
{'physical_server_model': 5, 'switchesport': 60, 'whmcs_tblorders_id': None, 'expire_time': datetime.datetime(2018, 6, 30, 16, 0, tzinfo=<UTC>), 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 26, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': 126, 'name': 'SE01-A3', 'pay_time': datetime.datetime(2018, 4, 30, 16, 0, tzinfo=<UTC>), 'switches': 3, 'ipmi_addr': '172.16.30.3', 'ipmi_pwd': None, 'desc': 'ip: 43.243.33.25 【As】', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}
{'physical_server_model': 5, 'switchesport': 60, 'whmcs_tblorders_id': None, 'expire_time': datetime.datetime(2018, 6, 30, 16, 0, tzinfo=<UTC>), 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 26, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': 126, 'name': 'SE01-A3', 'pay_time': datetime.datetime(2018, 4, 30, 16, 0, tzinfo=<UTC>), 'switches': 3, 'ipmi_addr': '172.16.30.3', 'ipmi_pwd': None, 'desc': 'ip: 43.243.33.25 【As】', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}
{'physical_server_model': 5, 'switchesport': 60, 'whmcs_tblorders_id': None, 'expire_time': datetime.datetime(2018, 6, 30, 16, 0, tzinfo=<UTC>), 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 26, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': 126, 'name': 'SE01-A3', 'pay_time': datetime.datetime(2018, 4, 30, 16, 0, tzinfo=<UTC>), 'switches': 3, 'ipmi_addr': '172.16.30.3', 'ipmi_pwd': None, 'desc': 'ip: 43.243.33.25 【As】', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}
{'physical_server_model': 5, 'switchesport': 60, 'whmcs_tblorders_id': None, 'expire_time': datetime.datetime(2018, 6, 30, 16, 0, tzinfo=<UTC>), 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 26, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': 126, 'name': 'SE01-A3', 'pay_time': datetime.datetime(2018, 4, 30, 16, 0, tzinfo=<UTC>), 'switches': 3, 'ipmi_addr': '172.16.30.3', 'ipmi_pwd': None, 'desc': 'ip: 43.243.33.25 【As】', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}
{'physical_server_model': 5, 'switchesport': 62, 'whmcs_tblorders_id': None, 'expire_time': None, 'cabinet': 3, 'ram': 'Supermicro  DDR4___16', 'ipmi_account': None, 'intranet_ip': None, 'cpu': 'Intel Xeon E3-1230 v5', 'task': None, 'has_intranet': False, 'user': 12, 'id': 27, 'price': Decimal('1000.00'), 'customer_desc': None, 'trade_record': None, 'name': 'SE01-A4', 'pay_time': None, 'switches': 3, 'ipmi_addr': '172.16.30.4', 'ipmi_pwd': None, 'desc': '', 'server_status': 'active', 'disk': 'Seagate SATA___1000'}

Is there any way to filter out the repeated items, in my case only left my requirement (SE01-A3, SE01-A4) set?

Possible duplicate of [Select DISTINCT individual columns in django?](https://stackoverflow.com/questions/3852104/select-distinct-individual-columns-in-django) — Underoos, May 31 '19 at 04:50

anjaneyulubatta505 · Accepted Answer · 2019-05-31T04:55:55.367

0

To skip duplicates we have to use distinct method on queryset like below

from django.forms.models import model_to_dict

qs = qs.annotate(
    letters=Substr('name', 1, 6), 
    length=Length('name')
).order_by('letters', 'length', 'name').distinct()
for a_qs in qs:
    jsonstr = model_to_dict(a_qs)
    print(jsonstr)

edited May 31 '19 at 04:55

answered May 31 '19 at 04:46

anjaneyulubatta505

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Filter out the repeated items of my queryset

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