Python django.db.utils.IntegrityError:唯一约束失败：rango\u页面\u新的.category\u id

我想运行此命令时遇到问题

python manage.py迁移

我得到了错误…我试图搜索如何修复它，但我找不到如何修复，也许这里有人可以帮我修复这个 这是我得到的错误

Operations to perform:
  Apply all migrations: admin, rango, contenttypes, auth, sessions
Running migrations:
  Applying rango.0004_auto_20160107_0149...Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/core/management/commands/migrate.py", line 161, in handle
    executor.migrate(targets, plan, fake=options.get("fake", False))
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/migrations/executor.py", line 68, in migrate
    self.apply_migration(migration, fake=fake)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/migrations/executor.py", line 102, in apply_migration
    migration.apply(project_state, schema_editor)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/migrations/migration.py", line 108, in apply
    operation.database_forwards(self.app_label, schema_editor, project_state, new_state)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/migrations/operations/fields.py", line 139, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/schema.py", line 470, in alter_field
    self._alter_field(model, old_field, new_field, old_type, new_type, old_db_params, new_db_params, strict)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/sqlite3/schema.py", line 202, in _alter_field
    self._remake_table(model, alter_fields=[(old_field, new_field)])
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/sqlite3/schema.py", line 146, in _remake_table
    self.quote_name(model._meta.db_table),
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/schema.py", line 111, in execute
    cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/utils.py", line 81, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/Django-1.7.11-py2.7.egg/django/db/backends/sqlite3/base.py", line 485, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: UNIQUE constraint failed: rango_page__new.category_id

forms.py

from django import forms
from rango.models import Page, Category

class CategoryForm(forms.ModelForm):
    name = forms.CharField(max_length=128, help_text="Please enter the category name.")
    views = forms.IntegerField(widget=forms.HiddenInput(), initial=0)
    likes = forms.IntegerField(widget=forms.HiddenInput(), initial=0)
    slug = forms.CharField(widget=forms.HiddenInput(), required=False)

    # An inline class to provide additional information on the form.
    class Meta:
        # Provide an association between the ModelForm and a model
        model = Category
        fields = ('name',)


class PageForm(forms.ModelForm):
    title = forms.CharField(max_length=128, help_text="Please enter the title of the page.")
    url = forms.URLField(max_length=200, help_text="Please enter the URL of the page.")
    views = forms.IntegerField(widget=forms.HiddenInput(), initial=0, required=False )

    class Meta:
        # Provide an association between the ModelForm and a model
        model = Page

        # What fields do we want to include in our form?
        # This way we don't need every field in the model present.
        # Some fields may allow NULL values, so we may not want to include them...
        # Here, we are hiding the foreign key.
        # we can either exclude the category field from the form,
        exclude = ('category',)
        #or specify the fields to include (i.e. not include the category field)
        #fields = ('title', 'url', 'views')

---

我该怎么做才能解决这个问题

好了，完成了，我只是编辑了这个脚本

rango/migrations/0004_auto_20160107_0149.py

旧的

将来

唯一=真到唯一=假

---

好的，完成了…

这个？您应该尝试只将相关信息包含到您的问题中（即您的

关于

视图与此无关）oaky谢谢您…问题是当我想在manage.py中运行迁移选项时，总是会出现错误django.db.utils.integrityyerror:唯一约束失败。我太糊涂了，无法解决这个问题，因为我找不到解决这个问题的相关方法

from django.db import models
from django.template.defaultfilters import slugify
# Create your models here.

class Category(models.Model):
    name = models.CharField(max_length=128, unique=True)
    views = models.IntegerField(default=0)
    likes = models.IntegerField(default=0)
    slug = models.SlugField(null=False)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super(Category, self).save(*args, **kwargs)

    def __unicode__(self):
        return self.name

class Page(models.Model):
    category = models.ForeignKey(Category)
    title = models.CharField(max_length=128)
    url = models.URLField(null=True)
    views = models.IntegerField(default=0, null=True)

#    def save(self, *args, **kwargs):
#        self.slug = slugify(self.name)
#        super(Category, self).save(*args, **kwargs)

    def __unicode__(self):      #For Python 2, use __str__ on Python 3
        return self.title

from django import forms
from rango.models import Page, Category

class CategoryForm(forms.ModelForm):
    name = forms.CharField(max_length=128, help_text="Please enter the category name.")
    views = forms.IntegerField(widget=forms.HiddenInput(), initial=0)
    likes = forms.IntegerField(widget=forms.HiddenInput(), initial=0)
    slug = forms.CharField(widget=forms.HiddenInput(), required=False)

    # An inline class to provide additional information on the form.
    class Meta:
        # Provide an association between the ModelForm and a model
        model = Category
        fields = ('name',)


class PageForm(forms.ModelForm):
    title = forms.CharField(max_length=128, help_text="Please enter the title of the page.")
    url = forms.URLField(max_length=200, help_text="Please enter the URL of the page.")
    views = forms.IntegerField(widget=forms.HiddenInput(), initial=0, required=False )

    class Meta:
        # Provide an association between the ModelForm and a model
        model = Page

        # What fields do we want to include in our form?
        # This way we don't need every field in the model present.
        # Some fields may allow NULL values, so we may not want to include them...
        # Here, we are hiding the foreign key.
        # we can either exclude the category field from the form,
        exclude = ('category',)
        #or specify the fields to include (i.e. not include the category field)
        #fields = ('title', 'url', 'views')

class Migration(migrations.Migration):

    dependencies = [
        ('rango', '0003_category_slug'),
    ]

    operations = [
        migrations.AlterField(
            model_name='page',
            name='category',
            field=models.ForeignKey(to='rango.Category', unique=True),
            preserve_default=True,
        ),

class Migration(migrations.Migration):

    dependencies = [
        ('rango', '0003_category_slug'),
    ]

    operations = [
        migrations.AlterField(
            model_name='page',
            name='category',
            field=models.ForeignKey(to='rango.Category', unique=False),
            preserve_default=True,
        ),