python - How to make articles added in the background automatically add which user edited them in django?

Question

The code I wrote (only the main part is posted):

admin.py

from django.contrib import admin
from .models import Tag, Category, Article


class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.author = request.user
        obj.save()


admin.site.register(Tag)
admin.site.register(Category)
admin.site.register(Article)

models.py

from django.db import models
from django.contrib.auth.models import User


class Tag(models.Model):
    class Meta:
        verbose_name = '标签'
        verbose_name_plural = verbose_name

    tag_name = models.CharField('标签名', max_length=20)
    create_time = models.DateTimeField('创建时间', auto_now_add=True)

    def __str__(self):
        return self.tag_name


class Category(models.Model):
    class Meta:
        verbose_name = '分类'
        verbose_name_plural = verbose_name

    name = models.CharField('分类名', max_length=20)

    def __str__(self):
        return self.name


class Article(models.Model):
    class Meta:
        verbose_name = '文章'
        verbose_name_plural = verbose_name
        ordering = ['-updated_time', '-created_time']

    title = models.CharField('标题', max_length=60)
    content = models.TextField('正文')
    category = models.ManyToManyField(Category, verbose_name='分类', blank=True)
    author = models.ForeignKey(User, verbose_name='作者', editable=False)
    tags = models.ForeignKey(Tag, verbose_name="标签", related_name='tags_article', blank=True)
    view_count = models.IntegerField('浏览次数', editable=False,default=0)
    created_time = models.DateTimeField('添加时间', auto_now_add=True)
    updated_time = models.DateTimeField('修改时间', auto_now=True)

    def __str__(self):
        return self.title

Add articles in the background and throw an error:

Internal Server Error: /admin/blog/article/add/
Traceback (most recent call last):
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\sqlite3\base.py", line 328, in execute
    return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: NOT NULL constraint failed: blog_article.author_id

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\core\handlers\exception.py", line 41, in inner
    response = get_response(request)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\core\handlers\base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\core\handlers\base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\options.py", line 551, in wrapper
    return self.admin_site.admin_view(view)(*args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\utils\decorators.py", line 149, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\views\decorators\cache.py", line 57, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\sites.py", line 224, in inner
    return view(request, *args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\options.py", line 1508, in add_view
    return self.changeform_view(request, None, form_url, extra_context)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\utils\decorators.py", line 67, in _wrapper
    return bound_func(*args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\utils\decorators.py", line 149, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\utils\decorators.py", line 63, in bound_func
    return func.__get__(self, type(self))(*args2, **kwargs2)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\options.py", line 1408, in changeform_view
    return self._changeform_view(request, object_id, form_url, extra_context)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\options.py", line 1448, in _changeform_view
    self.save_model(request, new_object, form, not add)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\contrib\admin\options.py", line 979, in save_model
    obj.save()
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\base.py", line 806, in save
    force_update=force_update, update_fields=update_fields)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\base.py", line 836, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\base.py", line 922, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\base.py", line 961, in _do_insert
    using=using, raw=raw)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\query.py", line 1063, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\models\sql\compiler.py", line 1099, in execute_sql
    cursor.execute(sql, params)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\utils.py", line 80, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\utils\six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "C:\Users\cxgre\fancyblog\lib\site-packages\django\db\backends\sqlite3\base.py", line 328, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: NOT NULL constraint failed: blog_article.author_id

What should I do?

Answer 1

ArticleAdmin is defined in admin.py but is not bound to the registration. So ArticleAdmin does not take effect. It needs to be changed to the following

from django.contrib import admin
from .models import Tag, Category, Article


class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.author = request.user
        obj.save()


admin.site.register(Tag)
admin.site.register(Category)
admin.site.register(Article, ArticleAdmin)