Django talk: Problem with makemigrations on Speedy Composer

Tuesday, December 13, 2016

Problem with makemigrations on Speedy Composer

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?