ON CONFLICT DO UPDATE

On 05/09/2018 07:04 PM, tango ward wrote:

Hi,

Sorry for asking question again.

I would like to know if there's a workaround for this. I need to insert
Student Balance data into a table. The source data have duplicate values
for student_id, school_id and campus_name. My StudentBalance model in Djano
have Class Meta of:

class Meta:
unique_together = (
"school",
"student_id",
"campus_name"
)

Searched online and found this magical tool called ON CONFLICT DO UPDATE.
I played around with it, made it work but there's a problem. The balance
data is not being updated which is because it's not in class Meta with
unique_together. I would like to know if there's a way to update the data
in Student Balance column without adding it to the class Meta?

I doubt that Meta has anything to do with the balance not being updated.
What the Meta does is set up a UNIQUE index over the school, student_id and
campus_name columns. I am going to say the issue is with ON CONFLICT DO
UPDATE clause you create on the table. To help solve this we need:

1) The schema of the table StudentBalance points to.

2) The ON CONFLICT DO UPDATE clause you created on the table.

Thanks,
J

--
Adrian Klaver
adrian.klaver@aklaver.com

On 05/09/2018 07:04 PM, tango ward wrote:

Hi,

Sorry for asking question again.

I would like to know if there's a workaround for this. I need to insert
Student Balance data into a table. The source data have duplicate values
for student_id, school_id and campus_name. My StudentBalance model in Djano
have Class Meta of:

class Meta:
unique_together = (
"school",
"student_id",
"campus_name"
)

Searched online and found this magical tool called ON CONFLICT DO UPDATE.
I played around with it, made it work but there's a problem. The balance
data is not being updated which is because it's not in class Meta with
unique_together. I would like to know if there's a way to update the data
in Student Balance column without adding it to the class Meta?

I doubt that Meta has anything to do with the balance not being updated.
What the Meta does is set up a UNIQUE index over the school, student_id and
campus_name columns. I am going to say the issue is with ON CONFLICT DO
UPDATE clause you create on the table. To help solve this we need:

1) The schema of the table StudentBalance points to.

2) The ON CONFLICT DO UPDATE clause you created on the table.

Thanks,
J

--
Adrian Klaver
adrian.klaver@aklaver.com

Sorry Sir Adrian, updating the code.

for row in cur_tdc:
print row['studentnumber'], row['firstname'], row['lastname'],
row['currentbalance']
cur_phil.execute("""
INSERT INTO recipients_studentbalance(
created, modified, student_id,
first_name, middle_name,
last_name, campus_name,
year_level, section,
balance, balance_as_of,
school_system_id
)
VALUES (current_timestamp,
current_timestamp,
%s, %s, %s, %s, %s,
%s, %s, %s, current_date,
(SELECT id
FROM education_schoolsystem
WHERE name='My Test School.')
)
ON CONFLICT (school_system_id,
student_id,
campus_name
) DO UPDATE
SET school_system_id =
excluded.school_system_id,
student_id = excluded.student_id,
campus_name = excluded.campus_name
""", (row['studentnumber'], row['firstname'],
row['middlename'], row['lastname'],
'My Test Schol.',
row['yearlevel'], row['section'],
row['currentbalance']))

On Thu, May 10, 2018 at 12:07 PM, Adrian Klaver <adrian.klaver@aklaver.com

wrote:

On 05/09/2018 07:04 PM, tango ward wrote:

Hi,

Sorry for asking question again.

I would like to know if there's a workaround for this. I need to insert
Student Balance data into a table. The source data have duplicate values
for student_id, school_id and campus_name. My StudentBalance model in Djano
have Class Meta of:

class Meta:
unique_together = (
"school",
"student_id",
"campus_name"
)

Searched online and found this magical tool called ON CONFLICT DO
UPDATE. I played around with it, made it work but there's a problem. The
balance data is not being updated which is because it's not in class Meta
with unique_together. I would like to know if there's a way to update the
data in Student Balance column without adding it to the class Meta?

I doubt that Meta has anything to do with the balance not being updated.
What the Meta does is set up a UNIQUE index over the school, student_id and
campus_name columns. I am going to say the issue is with ON CONFLICT DO
UPDATE clause you create on the table. To help solve this we need:

1) The schema of the table StudentBalance points to.

2) The ON CONFLICT DO UPDATE clause you created on the table.

Thanks,
J

--
Adrian Klaver
adrian.klaver@aklaver.com

On 10 May 2018, at 7:13, tango ward <tangoward15@gmail.com> wrote:

ON CONFLICT (school_system_id,
student_id,
campus_name
) DO UPDATE
SET school_system_id =

excluded.school_system_id,

student_id = excluded.student_id,
campus_name = excluded.campus_name

I'm pretty sure this ought to read:
ON CONFLICT (school_system_id, student_id, campus_name)
DO
UPDATE SET modified = EXCLUDED.modified,
balance = EXCLUDED.balance,
balance_as_of = EXCLUDED.balance_as_of

Instead, you were re-assigning the keys (school_system_id, student_id,
campus_name) to the same values again.

Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.