当我尝试创建博客时 post 显示非空约束失败：blog_blog.id
when i try to create a blog post is shows not null constraint failed: blog_blog.id
当我尝试创建博客时 post 显示 not null constraint failed: blog_blog.id 我已尽一切可能解决此问题但它仍然无法正常工作 我不知道是否应该添加和我的 models.py 中的 id 字段
让我展示一下我的代码
models.py
# some field are commented out because i was trying them to see if it would work
class Blog(models.Model):
id = models.UUIDField(primary_key=True, editable=False)
title = models.CharField(max_length=10000, null=True, blank=True, verbose_name="Title")
content = models.TextField(verbose_name="Post Content")
# slug = models.SlugField(unique=True)
image = models.ImageField(upload_to="blog-images/%Y/%m/%d/", verbose_name="Post Thumbnail")
category = models.ForeignKey(Category, on_delete=models.DO_NOTHING, verbose_name="Category", null=True)
tags = models.ManyToManyField(Tag, related_name='tags', verbose_name="Tag")
status = models.CharField(choices=STATUS_CHOICE, default="published", max_length=150, verbose_name='Status')
creator = models.ForeignKey(User, on_delete=models.DO_NOTHING, verbose_name="Creator", null=True)
created = models.DateTimeField(auto_now_add=True ,verbose_name="Created", null=True)
def get_absolute_url(self):
# return reverse('blog:blog-details', args=[self.slug])
return reverse('blog:blog-details', kwargs={'pk': self.pk})
class Meta:
verbose_name = "Blog Post"
verbose_name_plural = "Blog Posts"
def __str__(self):
return self.title
views.py
def blogpost(request):
if request.method == "POST":
form = BlogPostForm(request.POST, request.FILES)
if form.is_valid():
form = form.save(commit=False)
form.creator = request.user
form.save()
messages.success(request, f'Hi, Your Post have been sent for review and would be live soon!')
return redirect('blog:home')
else:
form = BlogPostForm()
context = {
"form": form
}
return render(request, 'blog/AddPost.html', context)
urls.py
path('', views.blog_list, name="home"),
path('post/<int:pk>', views.blog_detail, name="blog-details"),
path('post/categories/<slug:category_slug>', views.category, name="category"),
path('post/tags/<slug:tag_slug>', views.tag, name="tags"),
path('post/create/', views.blogpost, name="add-post"),
forms.py
class BlogPostForm(forms.ModelForm):
image = forms.ImageField(widget=forms.ClearableFileInput(attrs={'multiple': True}), required=True)
# content = forms.CharField(widget=forms.Textarea(attrs={'class': 'input is-medium'}), required=True)
tags = forms.CharField(widget=forms.TextInput(attrs={'class': 'input is-medium'}), required=True)
class Meta:
model = Blog
fields = ('title', 'content', 'image', 'category', 'tags')
addpost.html
<form action="" method="POST" enctype="multipart/form-data">
{% csrf_token %}
{{form|crispy}}
<div class="form-group">
<button class="btn theme-bg rounded" type="submit">Send Message</button>
</div>
</form>
这是我的完整追溯，并且有一条关于我最近遇到的错误的评论
任何帮助将不胜感激
System check identified no issues (0 silenced).
November 18, 2021 - 22:48:00
Django version 3.2.9, using settings 'dexxapikprj.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
[18/Nov/2021 22:48:02] "GET /blog/post/create/ HTTP/1.1" 200 23653
[18/Nov/2021 22:48:03] "GET /static/assets/fonts/themify.ttf?-fvbane HTTP/1.1" 404 1940
Internal Server Error: /blog/post/create/
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1823, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'd'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\views.py", line 44, in blogpost
form.save() # ← no commit=False
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\forms\models.py", line 469, in save
self._save_m2m()
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\forms\models.py", line 451, in _save_m2m
f.save_form_data(self.instance, cleaned_data[f.name])
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related.py", line 1668, in save_form_data
getattr(instance, self.attname).set(data)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related_descriptors.py", line 1007, in set
else self.target_field.get_prep_value(obj)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related.py", line 977, in get_prep_value
return self.target_field.get_prep_value(value)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1825, in get_prep_value
raise e.__class__(
ValueError: Field 'id' expected a number but got 'd'.
[18/Nov/2021 22:48:12] "POST /blog/post/create/ HTTP/1.1" 500 97645
[18/Nov/2021 22:48:38] "GET /admin/blog/blog/ HTTP/1.1" 200 14076
[18/Nov/2021 22:48:38] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:41] "GET /admin/blog/blog/c9f112b3-e108-4605-9c5b-edb952781045/change/ HTTP/1.1" 200 17761
[18/Nov/2021 22:48:41] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:41] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:50] "GET /admin/ HTTP/1.1" 200 14858
[18/Nov/2021 22:48:52] "GET /admin/blog/blog/ HTTP/1.1" 200 14076
[18/Nov/2021 22:48:52] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
Internal Server Error: /blog/
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\views.py", line 65, in blog_list
return render(request, 'blog/bloghome.html', context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader.py", line 62, in render_to_string
return template.render(context, request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\defaulttags.py", line 211, in render
nodelist.append(node.render_annotated(context))
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 988, in render
output = self.filter_expression.resolve(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 671, in resolve
obj = self.var.resolve(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 796, in resolve
value = self._resolve_lookup(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 858, in _resolve_lookup
current = current()
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\models.py", line 58, in get_absolute_url
return reverse('blog:blog-details', kwargs={'pk': self.pk})
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\urls\base.py", line 86, in reverse
return resolver._reverse_with_prefix(view, prefix, *args, **kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\urls\resolvers.py", line 694, in _reverse_with_prefix
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'blog-details' with keyword arguments '{'pk': UUID('c9f112b3-e108-4605-9c5b-edb952781045')}' not found. 1 pattern(s) tried: ['blog/(?P<post_id>[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})$']
[18/Nov/2021 22:48:57] "GET /blog/ HTTP/1.1" 500 200505
任何帮助将不胜感激
由于主键不是 AutoField 或 BigAutoField，因此不会自动分配值。
您应该指定一个可以生成随机 UUID 的函数。例如，您可以使用 uuid4() function [Python-doc]:
from uuid import <strong>uuid4</strong>
class Blog(models.Model):
id = models.UUIDField(primary_key=True<strong>, default=uuid4</strong>, editable=False)
# …
请注意，因为您没有使用表单保存对象，所以它不会像 tags 那样存储创建的对象的 ManyToManyFields。您可以将视图重写为：
def blogpost(request):
if request.method == "POST":
form = BlogPostForm(request.POST, request.FILES)
if form.is_valid():
form<strong>.instance.creator = request.user</strong>
form.save() # ← no commit=False
messages.success(request, f'Hi, Your Post have been sent for review and would be live soon!')
return redirect('blog:home')
else:
form = BlogPostForm()
context = {
'form': form
}
return render(request, 'blog/AddPost.html', context)
当我尝试创建博客时 post 显示 not null constraint failed: blog_blog.id 我已尽一切可能解决此问题但它仍然无法正常工作 我不知道是否应该添加和我的 models.py 中的 id 字段 让我展示一下我的代码
models.py
# some field are commented out because i was trying them to see if it would work
class Blog(models.Model):
id = models.UUIDField(primary_key=True, editable=False)
title = models.CharField(max_length=10000, null=True, blank=True, verbose_name="Title")
content = models.TextField(verbose_name="Post Content")
# slug = models.SlugField(unique=True)
image = models.ImageField(upload_to="blog-images/%Y/%m/%d/", verbose_name="Post Thumbnail")
category = models.ForeignKey(Category, on_delete=models.DO_NOTHING, verbose_name="Category", null=True)
tags = models.ManyToManyField(Tag, related_name='tags', verbose_name="Tag")
status = models.CharField(choices=STATUS_CHOICE, default="published", max_length=150, verbose_name='Status')
creator = models.ForeignKey(User, on_delete=models.DO_NOTHING, verbose_name="Creator", null=True)
created = models.DateTimeField(auto_now_add=True ,verbose_name="Created", null=True)
def get_absolute_url(self):
# return reverse('blog:blog-details', args=[self.slug])
return reverse('blog:blog-details', kwargs={'pk': self.pk})
class Meta:
verbose_name = "Blog Post"
verbose_name_plural = "Blog Posts"
def __str__(self):
return self.title
views.py
def blogpost(request):
if request.method == "POST":
form = BlogPostForm(request.POST, request.FILES)
if form.is_valid():
form = form.save(commit=False)
form.creator = request.user
form.save()
messages.success(request, f'Hi, Your Post have been sent for review and would be live soon!')
return redirect('blog:home')
else:
form = BlogPostForm()
context = {
"form": form
}
return render(request, 'blog/AddPost.html', context)
urls.py
path('', views.blog_list, name="home"),
path('post/<int:pk>', views.blog_detail, name="blog-details"),
path('post/categories/<slug:category_slug>', views.category, name="category"),
path('post/tags/<slug:tag_slug>', views.tag, name="tags"),
path('post/create/', views.blogpost, name="add-post"),
forms.py
class BlogPostForm(forms.ModelForm):
image = forms.ImageField(widget=forms.ClearableFileInput(attrs={'multiple': True}), required=True)
# content = forms.CharField(widget=forms.Textarea(attrs={'class': 'input is-medium'}), required=True)
tags = forms.CharField(widget=forms.TextInput(attrs={'class': 'input is-medium'}), required=True)
class Meta:
model = Blog
fields = ('title', 'content', 'image', 'category', 'tags')
addpost.html
<form action="" method="POST" enctype="multipart/form-data">
{% csrf_token %}
{{form|crispy}}
<div class="form-group">
<button class="btn theme-bg rounded" type="submit">Send Message</button>
</div>
</form>
这是我的完整追溯，并且有一条关于我最近遇到的错误的评论 任何帮助将不胜感激
System check identified no issues (0 silenced).
November 18, 2021 - 22:48:00
Django version 3.2.9, using settings 'dexxapikprj.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
[18/Nov/2021 22:48:02] "GET /blog/post/create/ HTTP/1.1" 200 23653
[18/Nov/2021 22:48:03] "GET /static/assets/fonts/themify.ttf?-fvbane HTTP/1.1" 404 1940
Internal Server Error: /blog/post/create/
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1823, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'd'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\views.py", line 44, in blogpost
form.save() # ← no commit=False
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\forms\models.py", line 469, in save
self._save_m2m()
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\forms\models.py", line 451, in _save_m2m
f.save_form_data(self.instance, cleaned_data[f.name])
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related.py", line 1668, in save_form_data
getattr(instance, self.attname).set(data)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related_descriptors.py", line 1007, in set
else self.target_field.get_prep_value(obj)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\related.py", line 977, in get_prep_value
return self.target_field.get_prep_value(value)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1825, in get_prep_value
raise e.__class__(
ValueError: Field 'id' expected a number but got 'd'.
[18/Nov/2021 22:48:12] "POST /blog/post/create/ HTTP/1.1" 500 97645
[18/Nov/2021 22:48:38] "GET /admin/blog/blog/ HTTP/1.1" 200 14076
[18/Nov/2021 22:48:38] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:41] "GET /admin/blog/blog/c9f112b3-e108-4605-9c5b-edb952781045/change/ HTTP/1.1" 200 17761
[18/Nov/2021 22:48:41] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:41] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
[18/Nov/2021 22:48:50] "GET /admin/ HTTP/1.1" 200 14858
[18/Nov/2021 22:48:52] "GET /admin/blog/blog/ HTTP/1.1" 200 14076
[18/Nov/2021 22:48:52] "GET /admin/jsi18n/ HTTP/1.1" 200 3195
Internal Server Error: /blog/
Traceback (most recent call last):
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\views.py", line 65, in blog_list
return render(request, 'blog/bloghome.html', context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader.py", line 62, in render_to_string
return template.render(context, request)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\defaulttags.py", line 211, in render
nodelist.append(node.render_annotated(context))
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 988, in render
output = self.filter_expression.resolve(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 671, in resolve
obj = self.var.resolve(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 796, in resolve
value = self._resolve_lookup(context)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\template\base.py", line 858, in _resolve_lookup
current = current()
File "C:\Users\Destiny\Desktop\DexxaPik\dexxapikprj\blog\models.py", line 58, in get_absolute_url
return reverse('blog:blog-details', kwargs={'pk': self.pk})
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\urls\base.py", line 86, in reverse
return resolver._reverse_with_prefix(view, prefix, *args, **kwargs)
File "C:\Users\Destiny\Desktop\DexxaPik\venv\lib\site-packages\django\urls\resolvers.py", line 694, in _reverse_with_prefix
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'blog-details' with keyword arguments '{'pk': UUID('c9f112b3-e108-4605-9c5b-edb952781045')}' not found. 1 pattern(s) tried: ['blog/(?P<post_id>[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})$']
[18/Nov/2021 22:48:57] "GET /blog/ HTTP/1.1" 500 200505
任何帮助将不胜感激
由于主键不是 AutoField 或 BigAutoField，因此不会自动分配值。
您应该指定一个可以生成随机 UUID 的函数。例如，您可以使用 uuid4() function [Python-doc]:
from uuid import <strong>uuid4</strong>
class Blog(models.Model):
id = models.UUIDField(primary_key=True<strong>, default=uuid4</strong>, editable=False)
# …
请注意，因为您没有使用表单保存对象，所以它不会像 tags 那样存储创建的对象的 ManyToManyFields。您可以将视图重写为：
def blogpost(request):
if request.method == "POST":
form = BlogPostForm(request.POST, request.FILES)
if form.is_valid():
form<strong>.instance.creator = request.user</strong>
form.save() # ← no commit=False
messages.success(request, f'Hi, Your Post have been sent for review and would be live soon!')
return redirect('blog:home')
else:
form = BlogPostForm()
context = {
'form': form
}
return render(request, 'blog/AddPost.html', context)