Re: Assistance for deploying django app to heroku

Please explain all your steps clearly. 

How are you creating fixture.json, Are you taking all data dump or only book model dump ??

On Sat, 24 Apr 2021 at 00:12, Ejike Enyinnaya <ejike.chiboka@gmail.com> wrote:

Hi Guys,

This is the error I am getting:

(first_django_app) ➜  first_django_app git:(master)  heroku run python manage.py loaddata books/fixtures.json
Running python manage.py loaddata books/fixtures.json on ⬢ gotbooksapp... up, run.6617 (Free)
Traceback (most recent call last):
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 82, in _execute
    return self.cursor.execute(sql)
psycopg2.errors.ForeignKeyViolation: insert or update on table "books_book" violates foreign key constraint "books_book_user_id_4b809191_fk_auth_user_id"
DETAIL:  Key (user_id)=(1) is not present in table "auth_user".


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/base.py", line 398, in execute
    output = self.handle(*args, **options)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/commands/loaddata.py", line 78, in handle
    self.loaddata(fixture_labels)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/core/management/commands/loaddata.py", line 131, in loaddata
    connection.check_constraints(table_names=table_names)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/postgresql/base.py", line 285, in check_constraints
    cursor.execute('SET CONSTRAINTS ALL IMMEDIATE')
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 98, in execute
    return super().execute(sql, params)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/app/.heroku/python/lib/python3.7/site-packages/django/db/backends/utils.py", line 82, in _execute
    return self.cursor.execute(sql)
django.db.utils.IntegrityError: Problem installing fixtures: insert or update on table "books_book" violates foreign key constraint "books_book_user_id_4b809191_fk_auth_user_id"
DETAIL:  Key (user_id)=(1) is not present in table "auth_user".

I have done the following: rm -f db.sqlite3

run python manage.py makemigrations

run python manage.py migrate

I had to add all the information again as the database had been cleaned out

I then implement fixtures.json locally

I did a git add ., git commit -m and git push heroku master

I did run heroku run python manage.py migrate

I finally run python manage.py loaddata books/fixtures.json

I still have the same errors again

BR,

Ejike Chiboka

08022224537; 08166516400

On Fri, Apr 23, 2021 at 7:28 PM Sujayeendra G <sgsujay.achari@gmail.com> wrote:

Hi, 

You can see IntegrityError: fixtures you are updating trying to find user with user_id=1 which are not available in your db. Try to create one user and migrate again. Or if the App is still in the development stage. Delete DB and migrate again. It may work. 

Thank you 

Regards

Sujay

On Fri, 23 Apr 2021 at 17:25, ejike....@gmail.com <ejike.chiboka@gmail.com> wrote:

Good day All,

I am trying to deploy my django app to heroku but i keep getting this error in the screenshot attached.

Please can anyone assist in me in finding a solution to this and where the issue could be coming from.

Looking forward to your replies.

Thanks and BR,

Ejike

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