This QueryDict instance is immutable #13217

carthique · 2023-07-18T23:26:32Z

carthique
Jul 18, 2023

NetBox version

v3.5.6

Python version

3.10

Steps to Reproduce

Trying to get available-ips using the below curl call

curl -X 'POST' \
  'http://localhost:8000/api/ipam/prefixes/5/available-ips/' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -H 'X-CSRFTOKEN: LLaGfBUEU5uVlM4ghWXXC34HFsGp3rgF75UVsnXcx4jMlQ5ADLC9o8tSkNqOHS67' \
  -F 'address=10.0.0.0/16'

We get the following error

<pre class="block"><strong>&lt;class &#x27;AttributeError&#x27;&gt;</strong><br />
This QueryDict instance is immutable

Expected Behavior

To get the list of IP addresses available
[10.0.0.2/16, 10.0.0.4/16, 10.0.0.5/16, 10.0.0.6/16, 10.0.0.7/16, 10.0.0.8/16, 10.0.0.9/16, 10.0.0.10/16, 10.0.0.11/16, 10.0.0.12/16, 10.0.0.13/16, 10.0.0.14/16, 10.0.0.15/16, 10.0.0.16/16, 10.0.0.17/16, 10.0.0.18/16, 10.0.0.19/16, 10.0.0.20/16, 10.0.0.21/16, 10.0.0.22/16, 10.0.0.23/16, 10.0.0.24/16, 10.0.0.25/16, 10.0.0.26/16, 10.0.0.27/16, 10.0.0.28/16, 10.0.0.29/16, 10.0.0.30/16, 10.0.0.31/16, 10.0.0.32/16, 10.0.0.33/16, 10.0.0.34/16, 10.0.0.35/16, 10.0.0.36/16, 10.0.0.37/16, 10.0.0.38/16, 10.0.0.39/16, 10.0.0.40/16, 10.0.0.41/16, 10.0.0.42/16, 10.0.0.43/16, 10.0.0.44/16, 10.0.0.45/16, 10.0.0.46/16, 10.0.0.47/16, 10.0.0.48/16, 10.0.0.49/16, 10.0.0.50/16, 10.0.0.51/16, 10.0.0.52/16]

Observed Behavior

<!DOCTYPE html>
<html lang="en">

<head>
    <title>Server Error</title>
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                        <i class="mdi mdi-alert"></i> Server Error
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                    <div class="card-body">
                        
                            <p>
                                There was a problem with your request. Please contact an administrator.
                            </p>
                        
                        <hr />
                        <p>
                            The complete exception is provided below:
                        </p>
<pre class="block"><strong>&lt;class &#x27;AttributeError&#x27;&gt;</strong><br />
This QueryDict instance is immutable

Python version: 3.10.6
NetBox version: 3.5.6</pre>
                        <p>
                            If further assistance is required, please post to the <a href="https://github.com/netbox-community/netbox/discussions">NetBox discussion forum</a> on GitHub.
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Answered by abhi1693

Jul 19, 2023

Please review your API call as it does not comply with the requirements: https://demo.netbox.dev/api/schema/swagger-ui/#/ipam/ipam_prefixes_available_ips_create

There are a few issues here:

You have not provided the Autorization token
The endpoint does not require any payload
The endpoint requires json content type

View full answer

abhi1693 · 2023-07-19T12:31:36Z

abhi1693
Jul 19, 2023

Please review your API call as it does not comply with the requirements: https://demo.netbox.dev/api/schema/swagger-ui/#/ipam/ipam_prefixes_available_ips_create

There are a few issues here:

You have not provided the Autorization token
The endpoint does not require any payload
The endpoint requires json content type

0 replies

candlerb · 2023-07-19T15:10:50Z

candlerb
Jul 19, 2023

If you want to "get the list of IP addresses available" then you need to make a GET request, not a POST request - and it works fine for me.

There is no need to provide the body parameter address=10.0.0.0/16. The address of the prefix is implicit from the prefix ID (that is, /api/ipam/prefixes/5/available-ips/ is referring to the prefix with id=5)

7 replies

carthique Jul 19, 2023
Author

Awesome! I think I forgot to refresh the auth token and that is the issue. But how do I create/allocate a /32 ip address from the pool of available ips within the prefix.

candlerb Jul 19, 2023

At simplest, you could just pick one of these IPs and create an IP address object with a regular POST.

It may be possible to assign one atomically using a POST to available-ips, but I can't see the semantics documented anywhere. The auto-generated swagger API doc is not helpful: it just says "Post a IP address object." and shows a random-looking request body.

I'm afraid this a common problem with REST APIs: the format of a request may be given, but the semantics are not.

carthique Jul 19, 2023
Author

Yeah, for picking the ip, i need it to be atomic op as there could be multiple requests coming in at the same time. Let me try out the post call with auth header and see if it returns a /32. I am able to get this done using the pynetbox library. Want the API version of the same. I really appreciate all the help I am getting here. Thanks

candlerb Jul 19, 2023

I am able to get this done using the pynetbox library. Want the API version of the same

Then just use tcpdump to show what pynetbox is sending. Do this between Apache/Nginx and Gunicorn, so you can see the plaintext traffic.

tcpdump -i lo -nn -s0 -A tcp port 8001

carthique Jul 19, 2023
Author

I tried with authentication and it works. Although it only works with content type application/json. I still hit the query dist is immutable error when using multipart/form-data may be an issue with swagger API doc.
Anyways, this solves my issue, thanks a lot for the help @candlerb and @abhi1693

mtinberg · 2023-07-19T16:36:37Z

mtinberg
Jul 19, 2023

I just want to be clear, that IP Address objects can have the real netmask associated and don't need to be created with /32, you can tell they are a single address because they are an ip-address and not a prefix, to make templating of resulting configs easier as you don't need to look up the containing prefix to get the mask (might still need it to get the gateway if it isn't something you can assume by convention in your templates). So you'd create a record for { "address": "10.12.254.6/24" } and not 10.12.254.6/32 unless you really wanted to strip this context from ip-address records (eg. I don't worry about netmask for VIPs/Anycast ip-address records) — Mark Tinberg ***@***.***> Division of Information Technology-Network Services University of Wisconsin-Madison

…

________________________________ From: carthique ***@***.***> Sent: Wednesday, July 19, 2023 10:57 AM To: netbox-community/netbox ***@***.***> Cc: Subscribed ***@***.***> Subject: Re: [netbox-community/netbox] This QueryDict instance is immutable (Discussion #13217) Yeah, for picking the ip, i need it to me atomic op as there could be multiple requests coming in at the same time. Let me try out the post call with auth header and see if it returns a /32. I am able to get this done using the pynetbox library. Want the API version of the same. I really appreciate all the help I am getting here. Thanks — Reply to this email directly, view it on GitHub<#13217 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AAS7UM6IJPGSAHSWDMZFSATXQ77VLANCNFSM6AAAAAA2QCQZGQ>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

3 replies

carthique Jul 19, 2023
Author

Thanks @mtinberg but I am trying to get a host(/32) IP address from the prefix here so I need a /32 and not a subnet.

candlerb Jul 19, 2023

When Netbox says "10.12.254.6/24" it's actually a single IP. That is, it means: "the single IP address 10.12.254.6 (/32 implied), but for use on a network with a prefix length of /24 (which is 10.12.254.0/24, also implied)"

That's just how it is. Money back if not satisfied.

carthique Jul 19, 2023
Author

@candlerb just realized that when I saw the response, you can keep the money 😄 as I am fully satisfied. Thanks for all the effort in helping me out with this

{"id":641,"url":"http://localhost:8000/api/ipam/ip-addresses/641/","display":"10.0.0.11/16","family":{"value":4,"label":"IPv4"},"address":"10.0.0.11/16","vrf":null,"tenant":null,"status":{"value":"active","label":"Active"},"role":null,"assigned_object_type":null,"assigned_object_id":null,"assigned_object":null,"nat_inside":null,"nat_outside":[],"dns_name":"","description":"","comments":"","tags":[],"custom_fields":{"allow_listed":true,"city":null,"country":null,"ip_type":null,"location":null},"created":"2023-07-19T19:20:23.942613Z","last_updated":"2023-07-19T19:20:23.942634Z"}

This QueryDict instance is immutable #13217

Uh oh!

Uh oh!

carthique Jul 18, 2023

NetBox version

Python version

Steps to Reproduce

Expected Behavior

Observed Behavior

Replies: 3 comments · 10 replies

Uh oh!

abhi1693 Jul 19, 2023

Uh oh!

candlerb Jul 19, 2023

Uh oh!

carthique Jul 19, 2023 Author

Uh oh!

candlerb Jul 19, 2023

Uh oh!

Uh oh!

carthique Jul 19, 2023 Author

Uh oh!

candlerb Jul 19, 2023

Uh oh!

carthique Jul 19, 2023 Author

Uh oh!

mtinberg Jul 19, 2023

Uh oh!

carthique Jul 19, 2023 Author

Uh oh!

candlerb Jul 19, 2023

Uh oh!

carthique Jul 19, 2023 Author

carthique
Jul 18, 2023

Replies: 3 comments 10 replies

abhi1693
Jul 19, 2023

candlerb
Jul 19, 2023

carthique Jul 19, 2023
Author

carthique Jul 19, 2023
Author

carthique Jul 19, 2023
Author

mtinberg
Jul 19, 2023

carthique Jul 19, 2023
Author

carthique Jul 19, 2023
Author