Why is the error appearing in django/admin? Migrations ok, I need to have 3 items in the table where I will have results.

class Robot(models.Model):
    """Robot model, speed and position simulation"""
    product = models.IntegerField(choices=CHOOSE)
    velocity = models.FloatField()
    positionX = models.FloatField()
    positionY = models.FloatField()
    angleTHETA = models.FloatField()

    class Meta:`enter code here`
        verbose_name = "Robot"
        verbose_name_plural = "Robots"

    def __str__(self):
        resum = self.get_product_display()
        return resum

ProgrammingError at /admin/robot/robot/ column robot_robot.velocity does not exist LINE 1: ...LECT "robot_robot"."id", "robot_robot"."product", "robot_rob...

==== Hello, can someone help me with the above problem, I keep getting this error: django.db.utils.ProgrammingError: relation "robot_cleanrobot" does not exist LINE 1: SELECT COUNT(*) AS "__count" FROM "robot_cleanrobot"

1. first migrations done
2. then pip install -r requirements.txt
3. python manage.py startapp
4. settings
5. makemigrations & migrate
6. add model
7. register a view

nothing helps me, I have done many times from scratch, even deleted the whole directory and also nothing,

I changed the model in the new project and nothing

At the beginning it worked ok for the first time, but when I added the float it all went down - I do not know what to do about it. Please help. Thx.

class CleanRobot(models.Model):
    """..."""
    name = models.CharField(max_length=100, null=True, blank=True)

    class Meta:
        verbose_name = "CleanRobot"
        verbose_name_plural = "CleanRobots"

    def __str__(self):
        return self.name

================================= Ok, not working: ok step by step what i am doing:

1. i create a django project
2. enable (venv)
3. makemigrations
4. migrate
5. pip install -r requirements.txt
6. copy to settinigs_local project
7. python manage.py start app
8. change settings - add code -> reference to local register application
9. add code to models
10. register models
11. makemigrations
12. migrate
13. runserver
14. dajngo/admin ... Add is ok, by name entering I get error... I have other projects on my computer and they work normally... I have other projects on my computer and they work normally... not today I have deleted the whole folder for the 20th time...

CodePudding user response：

You are getting the error because the database fields that you requested probably do not exist. Remember to run both

and also you should have a new non-empty file in your app's migrations folder. Then run migrate command. You should see something like:

If something went wrong, post the message you did get.

CodePudding user response：

Works: I don't know which of these things worked but:

1. i had alpha name and alpha project name so i changed to alphaapp,
2. after migration 2 I created a new superuser

Maybe this will be useful for someone ;)