Question

所以我有这个帖子模块：

using System;
using System.Linq;
using System.IO;

namespace ConsoleApp
{
    class Program
    {
        static string path = @"path\to\csv_file.csv";

        public class Person
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public string PreferredFood { get; set; }
            public override string ToString()
            {
                // Matches what a csv line looks like
                return $"{Id},{Name},{PreferredFood}";
            }
        }

        static void Main(string[] args)
        {
            var lines = File.ReadAllLines(path); // Read all lines of a csv file
            var groups = lines
                .Skip(1) // Skip header line
                .Select(line => line.Split(',')) // Split by comma
                .Select(column => new Person
                {
                    Id = int.Parse(column[0]),
                    Name = column[1],
                    PreferredFood = column[2]
                })// Convert to Person
                .GroupBy(person => person.PreferredFood); // Group by preferred food 

            foreach (var group in groups)
            {
                var foodPath = Path.Combine(Path.GetDirectoryName(path), $"{group.Key}.csv"); // Create unique filename for each csv
                var foodOutput = new string[] { lines[0] } // Add header line
                    .Concat(group.ToList().Select(person => person.ToString())); // Concatenate all other lines
                File.WriteAllLines(foodPath, foodOutput); // Write output to csv foodPath
            }               

            Console.ReadKey();
        }
    }
}

和此评论模块：

class Post(models.Model):
    title = models.CharField(max_length=50)
    content = models.TextField(max_length=255)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    date_pub = models.DateTimeField(timezone.now)


    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('blog-home')

这是我对此发表的看法：

class Comment(models.Model):
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    comment_author = models.ForeignKey(User, on_delete=models.CASCADE)
    content = models.TextField(max_length=255)

    def get_absolute_url(self):
        return reverse('blog-home')

关于网址：

/ post / 1 ===>将是1号帖子

/ post / 1 / comment ===>是发布新评论的形式

我希望form.instance.post_id是评论所属的帖子ID。

我该怎么做？

Answer 1

我猜测您的网址格式与此类似：

path('post/<int:pk>/comment', CreateComment.as_view(), name='create_comment')

这就是我要做的（假设SingleObjectMixin与CreateView结合使用）：

from django.views.generic.detail import SingleObjectMixin

class CreateComment(LoginRequiredMixin, CreateView, SingleObjectMixin):
    model = Comment
    template_name = 'my_blog/create_post.html'
    fields = ['content']

    def form_valid(self, form):
        form.instance.comment_author = self.request.user
        form.instance.post = self.get_object()
        return super().form_valid(form)

Answer 2

form.instance.post_id = self.kwargs['pk']

是我要找的东西

Django-访问Comment模型内的Post模块的pk / id

2 个答案: