保存时，textarea中的换行符数量加倍 [英] Newlines in textarea are doubled in number when saved

问题描述

我正在使用Django Wiki应用程序.用户可以在文本区域中输入降价文本来创建或编辑条目.但是，无论何时发生这种情况，文本之间的换行符数量都会加倍.例如，如果用户在文本区域中输入了4个换行符，则保存的markdown文件将具有8个换行符.

I am working on a Django wiki app. The user can enter markdown text in a textarea to either create or edit an entry. Whenever this happens though, the number of newlines between text are doubled. For example if the user entered 4 newlines in the textarea, the saved markdown file will have 8 newlines.

'''

# in views.py
class ContentForm(forms.Form):
    content = forms.CharField(
        required=True,
        widget=forms.Textarea,
        label="Contents")

def edit(request, title):
    if request.method == 'POST':
        # save_entry saves the markdown text to the given title.md
        save_entry(title, request.POST['content'])
        # redirect the user to the updated wiki page
        return HttpResponseRedirect(reverse('entry', args=(title,)))
    else:
        # get_entry returns markdown text for a title
        content = get_entry(title)
        form = ContentForm(request.POST or None, initial={'content': content})
        return render(request, "encyclopedia/edit.html", {
            "title": title,
            "content": content,
            "form": form
        })


# in edit.html
<h1>Edit {{  title  }}</h1>
<form action="{% url 'edit' title %}" method="post">
    {% csrf_token %}
    {{  form  }}
    <input type="submit" value="Save Changes">
</form>


# save_entry and get_entry definitions
def save_entry(title, content):
    """
    Saves an encyclopedia entry, given its title and Markdown
    content. If an existing entry with the same title already exists,
    it is replaced.
    """
    filename = f"entries/{title}.md"
    if default_storage.exists(filename):
        default_storage.delete(filename)
    default_storage.save(filename, ContentFile(content))


def get_entry(title):
    """
    Retrieves an encyclopedia entry by its title. If no such
    entry exists, the function returns None.
    """
    try:
        f = default_storage.open(f"entries/{title}.md")
        return f.read().decode("utf-8")
    except FileNotFoundError:
        return None

'''

在这种情况下，我使用了textarea小部件，但在此之前，我仅使用了textarea html标记，但也没有用.同样，要创建一个新页面，我没有使用小部件，并且也正在做同样的事情.我已经尝试修复了多个小时.可能出什么问题了?

In this case I used a textarea widget, but before this I had just used the textarea html tag and that was not working either. To create a new page as well, I am not using a widget and that is doing the same thing too. I've been trying to fix this for many hours. What could be going wrong?

推荐答案

在将其传递给保存功能之前，我通过使用bytes(content，'utf8')修复了此问题.

I fixed this by using bytes(content, 'utf8') before passing it to the save function.

请参阅: bytes()为什么解决了我的换行问题?

if request.method == 'POST':
    save_entry(title, bytes(request.POST['new_content'], 'utf8'))
    return HttpResponseRedirect(reverse('encyclopedia:entry', args=(title,)))

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