完善基于django的查重代码，使其能够比较两个文件并计算它们的重合率

当然，我可以帮你完善基于 Django 的查重代码，使其能够比较两个文件并计算它们的重合率。以下是相应的代码修改：

1. 修改 `checker/models.py` 文件，添加 `content` 字段用于存储文件内容：

   from django.db import models

   class Document(models.Model):
       title = models.CharField(max_length=200)
       file = models.FileField(upload_to='documents/')
       content = models.TextField(blank=True)

       def __str__(self):
           return self.title

2. 修改 `checker/views.py` 文件，添加一个新的视图函数 `compare_documents` 用于比较两个文件的内容：

   from django.shortcuts import render, redirect
   from .models import Document
   from difflib import SequenceMatcher

   def compare_documents(request):
       if request.method == 'POST':
           document1_id = request.POST['document1']
           document2_id = request.POST['document2']

           document1 = Document.objects.get(id=document1_id)
           document2 = Document.objects.get(id=document2_id)

           # 获取文件内容
           content1 = document1.content
           if not content1:
               with open(document1.file.path, 'r') as f:
                   content1 = f.read()
                   document1.content = content1
                   document1.save()

           content2 = document2.content
           if not content2:
               with open(document2.file.path, 'r') as f:
                   content2 = f.read()
                   document2.content = content2
                   document2.save()

           # 计算重合率
           similarity_ratio = SequenceMatcher(None, content1, content2).ratio() * 100

           return render(request, 'checker/result.html', {'document1': document1, 'document2': document2, 'similarity_ratio': similarity_ratio})
       
       documents = Document.objects.all()
       return render(request, 'checker/compare_documents.html', {'documents': documents})

3. 创建模板文件 `compare_documents.html` 和 `result.html`：

- `compare_documents.html`：

     <form method="post" action="{% url 'compare_documents' %}">
         {% csrf_token %}
         <label for="document1">Document 1:</label>
         <select name="document1" required>
             {% for document in documents %}
                 <option value="{{ document.id }}">{{ document.title }}</option>
             {% endfor %}
         </select>
         <br>
         <label for="document2">Document 2:</label>
         <select name="document2" required>
             {% for document in documents %}
                 <option value="{{ document.id }}">{{ document.title }}</option>
             {% endfor %}
         </select>
         <br>
         <input type="submit" value="Compare">
     </form>

- `result.html`：

     <h2>Comparison Result:</h2>
     <p>Document 1: {{ document1.title }}</p>
     <p>Document 2: {{ document2.title }}</p>
     <p>Similarity Ratio: {{ similarity_ratio }}%</p>

4. 添加 URL 映射：

在 `plagiarism_checker/urls.py` 文件中添加以下代码：

   from django.urls import path
   from checker.views import upload_document, compare_documents

   urlpatterns = [
       path('upload/', upload_document, name='upload_document'),
       path('compare/', compare_documents, name='compare_documents'),
   ]

这样，你就可以上传文件，并在比较页面中选择两个文件进行对比。结果将显示两个文件的重合率。希望这能帮助到你！