python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, blog, contenttypes, sessions
Running migrations:
  Applying blog.0001_initial...Traceback (most recent call last):
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 82, in _execute
    return self.cursor.execute(sql)
psycopg2.errors.UndefinedObject: no existe la clase de operadores «varchar_pattern_ops» para el método de acceso «gin»


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 "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/core/management/commands/migrate.py", line 234, in handle
    fake_initial=fake_initial,
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/migrations/executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/migrations/migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/migrations/operations/models.py", line 744, in database_forwards
    schema_editor.add_index(model, self.index)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/base/schema.py", line 335, in add_index
    self.execute(index.create_sql(model, self), params=None)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/base/schema.py", line 137, in execute
    cursor.execute(sql, params)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 99, in execute
    return super().execute(sql, params)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/hlozada/.local/share/virtualenvs/siete-yWHkfWg0/lib/python3.7/site-packages/django/db/backends/utils.py", line 82, in _execute
    return self.cursor.execute(sql)
django.db.utils.ProgrammingError: no existe la clase de operadores «varchar_pattern_ops» para el método de acceso «gin»