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我在我的博客上工作，但是当我迁移时，它给了我一个错误：“期望的字符串或缓冲区”错误。在第22行中，这是一个收集视图时间的整体模型，我想也许它已经改变了view.py中的值，并且在创建它们之后可能无法修改模型。 因此，我试图修改default并在view_time中添加其他参数，但这不起作用。有人可以帮我解决问题，或者给我一个明智的想法来重新设计一个更好的数据库吗？这是我的代码。Django“期望的字符串或缓冲区”错误
models.py，Article包含view.py的view time
class Article(models.Model):
title = models.CharField(max_length=20)
content = MarkdownField()
date = models.DateField()
description = models.TextField(blank=True)
article_type = (
('Learning', (
('Python', 'python'),
('Java', 'java'),
)
),
('Life', 'life'),
('Other', 'other')
)
type = models.CharField(max_length=20, choices=article_type, blank=True)
lock = models.BooleanField(default=False)
view_time = models.IntegerField(default=1) # line 22 [error occured here]
def __str__(self):
return self.title
class Comment(models.Model):
name = models.CharField(null=True, blank=True, max_length=20)
comment = models.TextField()
auto_date = models.DateField(auto_now_add=True)
belong_to = models.ForeignKey(to=Article, related_name="under_comment", null=True, blank=True)
def __str__(self):
return self.name
部分，当一篇文章中被访问时，view_time将增加1
def blog_content(request, page_num, error_form=None):
context = {}
form = CommentForm
view_update = Article.objects.get(id=page_num)
view_update.view_time += 1
view_update.save()
context['detail'] = view_update
comments = Comment.objects.filter(belong_to=view_update)
context['comments'] = comments
print(comments.values().count())
if error_form is not None:
context['form'] = error_form
else:
context['form'] = form
return render(request, 'blog_content.html', context)
的错误跟着
Applying blogapp.0018_comment_date...Traceback (most recent call last):##new added
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
utility.execute()
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/management/__init__.py", line 359, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/management/base.py", line 305, in run_from_argv
self.execute(*args, **cmd_options)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/management/base.py", line 356, in execute
output = self.handle(*args, **options)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 202, in handle
targets, plan, fake=fake, fake_initial=fake_initial
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/migrations/executor.py", line 97, in migrate
state = self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/migrations/executor.py", line 132, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/migrations/executor.py", line 237, in apply_migration
state = migration.apply(state, schema_editor)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", line 84, in database_forwards
field,
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/backends/sqlite3/schema.py", line 231, in add_field
self._remake_table(model, create_fields=[field])
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/backends/sqlite3/schema.py", line 113, in _remake_table
self.effective_default(field)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 221, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 755, in get_db_prep_save
prepared=False)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 1280, in get_db_prep_value
value = self.get_prep_value(value)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 1275, in get_prep_value
return self.to_python(value)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 1237, in to_python
parsed = parse_date(value)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/utils/dateparse.py", line 60, in parse_date
match = date_re.match(value)
TypeError: expected string or buffer
这是blogapp.0018_comment_date文件：
# -*- coding: utf-8 -*-
# Generated by Django 1.10 on 2017-07-26 12:19
from __future__ import unicode_literals
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('blogapp', '0017_comment'),
]
operations = [
migrations.AddField(
model_name='comment',
name='date',
field=models.DateField(default=True),
),
]
这个错误发生在迁移中，它与视图无关。 –
那我该如何解决？ – Pan
请显示失败的迁移。 – Alasdair