CODEWITHSUNDEEP
djangodjango-urlsdjango-class-based-views
user1876508
user1876508

Reputation: 13172

How Do I get a URL parameter passed into a django CBV?

I have a urls.py file setup as follows

from django.conf.urls import patterns, include, url
from .views import *

urlpatterns = patterns('',
    url(r'^$', BlogListView.as_view()),
    url(r'(?P<blog_id>)\d{1,}/$', BlogDetailView.as_view())
)

with the correlating view

class BlogDetailView(View):
    def get(self, request, blog_id, *args, **kwargs):
        post = Blog.objects.get(post_id=blog_id).to_detail_json
        return HttpResponse(json.dumps(post), mimetype='application/json')

I get an error when I visit 127.0.0.1:8000/blog/1/

ValueError at /blog/4/
invalid literal for int() with base 10: ''

but if I change

post = Blog.objects.get(post_id=blog_id).to_detail_json

to

post = Blog.objects.get(post_id=1).to_detail_json

then I get the correct response.

In case it is wanted, here is my model

from mongoengine import *
from collections import OrderedDict

import datetime
import json

class Blog(Document):
    post_id = IntField(unique=True)
    title = StringField(max_length=144, required=True)
    date_created = DateTimeField(default=datetime.datetime.now)
    body = StringField(required=True)

    def __init__(self, *args, **kwargs):
        self.schema = {
        "title": self.title,
        "date": str(self.date_created),
        "id": self.post_id,
        "body": self.body
    }
            super(Blog, self).__init__(*args, **kwargs)
    @property
    def to_detail_json(self):
        fields = ["id","title", "date", "body"]
        return {key:self.schema[key] for key in fields}

    @property
    def to_list_json(self):
        fields = ["title", "date"]
        return {key:self.schema[key] for key in fields}

Update

I changed the BlogDetailView to return

return HttpResponse(json.dumps(self.kwargs),mimetype='application/json')

and it gives me

{
    blog_id: ""
}

Which leads me to believe it is something with my urls.py file, but I do not see the error.

Upvotes: 4

Views: 1118

Answers (2)

user1876508
user1876508

Reputation: 13172

It turns out that

url(r'(?P<blog_id>)\d{1,}/$', BlogDetailView.as_view())

should be

url(r'(?P<blog_id>\d{1,})/$', BlogDetailView.as_view())

Upvotes: 0

DRC
DRC

Reputation: 5048

try

post = Blog.objects.get(post_id=self.kwargs['blog_id']).to_detail_json

Upvotes: 3

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