Django talk: Re: Problem with makemigrations on Speedy Composer

If I set SpeedyComposerNamedEntity to be abstract (which makes sense, there will not be objects of it), I get this error message:

peedy\composer>manage.py makemigrations

SystemCheckError: System check identified some issues:

ERRORS:

compose.Composition.accompaniment: (models.E006) The field 'accompaniment' clashes with the field 'accompaniment' from model 'accounts.namedentity'.

compose.Composition.folder: (models.E006) The field 'folder' clashes with the field 'folder' from model 'accounts.namedentity'.

compose.Composition.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.

compose.Folder.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.

And if I set NamedEntity to be abstract, I get this error message:

speedy\composer>manage.py makemigrations

SystemCheckError: System check identified some issues:

ERRORS:

compose.Composition.accompaniment: (models.E006) The field 'accompaniment' clashes with the field 'accompaniment' from model 'accounts.entity'.

compose.Composition.folder: (models.E006) The field 'folder' clashes with the field 'folder' from model 'accounts.entity'.

compose.Composition.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.

compose.Folder.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.

Entity can't be abstract because it contains all the entities and usernames on the database, it must have a table.

Thanks,

Uri.

Uri Even-Chen

Phone: +972-54-3995700
Email: uri@speedy.net
Website: http://www.speedysoftware.com/uri/en/

On Tue, Dec 13, 2016 at 5:56 PM, GMail <roboslone@gmail.com> wrote:

Hi!

First guess - SpeedyComposerNamedEntity is not an abstract model. Meta is not inherited from NamedEntity, you have to do that explicitly:

class SpeedyComposerNamedEntity(NamedEntity):
...

class Meta(NamedEntity.Meta):
pass

...
On 13 Dec 2016, at 18:30, Uri Even-Chen <uri@speedy.net> wrote:
Dear Django Users,

I'm trying to write the models of Speedy Composer in Django 1.10.4, but I can't run makemigrations - I get this error message:
speedy\composer>manage.py makemigrations
SystemCheckError: System check identified some issues:

ERRORS:
compose.Composition.accompaniment: (models.E006) The field 'accompaniment' clashes with the field 'accompaniment' from model 'compose.speedycomposernamedentity'.
compose.Composition.folder: (models.E006) The field 'folder' clashes with the field 'folder' from model 'compose.speedycomposernamedentity'.
compose.Composition.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.
compose.Folder.user: (models.E006) The field 'user' clashes with the field 'user' from model 'accounts.entity'.

This is my new models.py file of my new app, speedy.composer.compose (from PyCharm):
from django.conf import settings
from django.db import models
from django.utils.translation import ugettext_lazy as _

from speedy.net.accounts.models import NamedEntity


class SpeedyComposerNamedEntity(NamedEntity):
    MIN_USERNAME_LENGTH = 1
    MAX_USERNAME_LENGTH = 200
    MIN_SLUG_LENGTH = 1
    MAX_SLUG_LENGTH = 200
    MIN_NAME_LENGTH = 1
    MAX_NAME_LENGTH = 200

    def __str__(self):
        return '{}'.format(self.name)


class ChordsTemplate(SpeedyComposerNamedEntity):

    class Meta:
        verbose_name = _('chords template')
        verbose_name_plural = _('chords templates')


class Accompaniment(SpeedyComposerNamedEntity):

    class Meta:
        verbose_name = _('accompaniment')
        verbose_name_plural = _('accompaniments')


class Folder(SpeedyComposerNamedEntity):
    user = models.ForeignKey(verbose_name=_('user'), to=settings.AUTH_USER_MODEL, related_name='+')

    class Meta:
        verbose_name = _('folder')
        verbose_name_plural = _('folders')


class Composition(SpeedyComposerNamedEntity):
    user = models.ForeignKey(verbose_name=_('user'), to=settings.AUTH_USER_MODEL, related_name='+')
    folder = models.ForeignKey(verbose_name=_('folder'), to=Folder, related_name='+')
    chords_template = models.ForeignKey(verbose_name=_('chords template'), to=ChordsTemplate, related_name='+')
    accompaniment = models.ForeignKey(verbose_name=_('accompaniment'), to=Accompaniment, related_name='+')
    tempo = models.SmallIntegerField(verbose_name=_('tempo'), default=105)
    public = models.BooleanField(verbose_name=_('public'), default=False)

    class Meta:
        verbose_name = _('composition')
        verbose_name_plural = _('compositions')

You can see the speedy.net code on GitHub: https://github.com/urievenchen/speedy-net

What did I do wrong? Did I write the models wrongly?
Thanks,
Uri.
 Uri Even-Chen     
Phone: +972-54-3995700
Email: uri@speedy.net
Website: http://www.speedysoftware.com/uri/en/
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Tuesday, December 13, 2016

Re: Problem with makemigrations on Speedy Composer

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