Django 中的动态长度表单处理和数据收集

Question

我有一个表单，其中输入字段的数量不断变化，并且取决于我传递的参数。这意味着我无法转到 forms.py 并创建 Form class，因为这需要我事先定义输入参数。

这是我定义表单的方式。

<!-- Table to Display the original sentence and take the input of the translation -->
    <table class="table">
        <thead class="thead-dark">
          <tr>
            <th scope="col">#</th>
            <th scope="col">Original Sentence</th>
            <th scope="col">Translation</th>
          </tr>
        </thead>
        <form name="translated-text-form" class="form-control" action="" method="post">
            {% csrf_token %}
            <tbody>

                {% for sentence in sentences %}
                <tr>
                    <th scope="row">{{ forloop.counter }}</th>
                    <td>{{ sentence.original_sentence }}</td>
                    <td><input type="text" name="translated-{{sentence.id}}" value="{{ sentence.translated_sentence }}" /></td>
                </tr>
                {% endfor %}

                <tr>
                    <td colspan="2">
                        <br>
                        <p style="text-align: center;">
                            <input class="btn btn-secondary" type="submit" value="Save Translations"/>
                        </p>
                    </td>
                </tr>
            </tbody>
        </form>
      </table>

这是表单输出

用户将在最右边的列中添加一些文本，我想在我的 Sentence 模型中使用特定的 sentence.id 保存该文本。这是我的模型的样子


class Sentence(models.Model): 
    """ Model which holds the details of a sentence. A sentence is a part of a Wikipedia article which is tokenized.

    Fields:
        project_id: The ID of the project to which the sentence belongs 
        original_sentence: The original sentence tokenized from from the Wikipedia article.
        translated_sentence: The translated sentence in the target language.
    """

    # Define the sentence model fields 
    project_id = models.ForeignKey(Project, on_delete=models.CASCADE)
    original_sentence = models.CharField(max_length=5000)
    translated_sentence = models.CharField(max_length=5000, default="No Translation Found")

我知道我将如何处理这个问题。在我的 views.py 中，我想运行一个 for 循环并从名称为 translated-{{sentence.id}} 的表单中收集数据。但是，我无法制作可以直接从表单收集数据并将其保存在基于句子 id 的 Sentence 模型中的 POST 请求处理程序。我需要帮助在我的视图中编写请求处理程序。

Answer 1

我找到了一个根本不使用 forms.py 的修复程序。这就是 post 请求处理程序的样子。

    # Handle the post request
    if request.method == 'POST':

        # Get the project details from the database
        all_sentence_data = Sentence.objects.filter(project_id=pk)
        sentence_ids = [sentence.id for sentence in all_sentence_data]

        # Iterate through all the input fields in the form 
        for i in range(len(sentence_ids)): 
            
            # Get the translated text from the form
            try: 
                translated_text = request.POST[f"translated-{str(sentence_ids[i])}"]

                if translated_text: 
                    
                    # Update the Sentence object with the translated text
                    Sentence.objects.filter(id=sentence_ids[i]).update(translated_sentence=translated_text)
            
            except: 
                continue

        messages.success(request, "Your translations have been saved successfully!")
        return redirect('/translation/' + str(pk)+'/')
    
    else: 
        return redirect('/translation/' + str(pk)+'/')

Django 中的动态长度表单处理和数据收集

Dynamic Length Form handling and Data Collection in Django

python

django

django-models

django-forms

django-views