Question

我有两个模型：

# Default server configuration
#

server {

    server_name www.example.com;

    return 301 https://example.com$request_uri;
}

server {
    listen [::]:443 ssl http2;
    listen 443 ssl http2;
    listen 80;

    # listen on both hosts
    server_name example.com;


    index index.php index.html index.htm;

    location / {
        include cors;
                try_files $uri $uri/ /index.php$is_args$args;
        }
    if ($http_x_forwarded_proto = "http") {
              return 301 https://$server_name$request_uri;
        }

    # pass the PHP scripts to FastCGI server listening on /var/run/php/php7.0-fpm.sock
        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
        }
    # Path for static files
    root /home/ubuntu/apps/mysite.com/website/;

    #Specify a charset
    charset utf-8;

    # Custom 404 page
    error_page 404 /404.html;

    # Include the basic h5bp config set
    #include h5bp/basic.conf;





    ssl_certificate /etc/letsencrypt/live/example.com-0001/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com-0001/privkey.pem; # managed by Certbot
}

我想显示与事件相关的每个来源，但这不起作用：

class Incident(models.Model):
    iid = models.IntegerField(primary_key=True)

class Source(models.Model):

    sid = models.IntegerField(primary_key=True)
    incident = models.ForeignKey('Incident', on_delete=models.SET_NULL, null=True)
    url = models.TextField(validators=[URLValidator()])

Answer 1

外键的默认反向名称为<modelname>_set。所以试试这个：

{% for source in incident.source_set.all %}

您可以使用related_name选项更改反向名称：

incident = models.ForeignKey('Incident', on_delete=models.SET_NULL, null=True, related_name='sources')

在这种情况下，事件的sources属性将为您提供源对象：

{% for source in incident.sources.all %}

如何参考外键链接表

1 个答案: