Create a new cable on an already used interface (API) #7236

New Issue

adam · 2025-12-29T20:20:44+01:00

adam commented

2025-12-29 20:20:44 +01:00

Originally created by @Etibru on GitHub (Nov 16, 2022).

Originally assigned to: @jeremystretch on GitHub.

NetBox version

v3.3.7

Python version

3.9

Steps to Reproduce

Create a cable between 2 blank interfaces
Using api to create a cable (/api/dcim/cables/)

data_cable = {
        "a_terminations": [
            {
                "object_type": "dcim.interface",
                "object_id": 31,
            },
        ],
        "b_terminations": [
            {
                "object_type": "dcim.interface",
                "object_id": 59,
            },
        ],
        "status": "connected",
    }

OK
2. Repeat with the same interface for B and another one for A

data_cable = {
        "a_terminations": [
            {
                "object_type": "dcim.interface",
                "object_id": 32,
            },
        ],
        "b_terminations": [
            {
                "object_type": "dcim.interface",
                "object_id": 59,
            },
        ],
        "status": "connected",
    }

Error 500

Expected Behavior

Note the fact that the interface is already in use

Observed Behavior

django.db.utils.IntegrityError: duplicate key value violates unique constraint "dcim_cable_termination_unique_termination" DETAIL: Key (termination_type_id, termination_id)=(32, 59) already exists.

Originally created by @Etibru on GitHub (Nov 16, 2022). Originally assigned to: @jeremystretch on GitHub. ### NetBox version v3.3.7 ### Python version 3.9 ### Steps to Reproduce 1. Create a cable between 2 blank interfaces Using api to create a cable (/api/dcim/cables/) ``` data_cable = { "a_terminations": [ { "object_type": "dcim.interface", "object_id": 31, }, ], "b_terminations": [ { "object_type": "dcim.interface", "object_id": 59, }, ], "status": "connected", } ``` OK 2. Repeat with the same interface for B and another one for A ``` data_cable = { "a_terminations": [ { "object_type": "dcim.interface", "object_id": 32, }, ], "b_terminations": [ { "object_type": "dcim.interface", "object_id": 59, }, ], "status": "connected", } ``` 4. Error 500 ### Expected Behavior Note the fact that the interface is already in use ### Observed Behavior `django.db.utils.IntegrityError: duplicate key value violates unique constraint "dcim_cable_termination_unique_termination" DETAIL: Key (termination_type_id, termination_id)=(32, 59) already exists.`

adam added the type: bug status: accepted labels 2025-12-29 20:20:44 +01:00

adam closed this issue

2025-12-29 20:20:44 +01:00

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update-changelog-comments-docs

feature-removal-issue-type

20911-dropdown

20239-plugin-menu-classes-mutable-state

21097-graphql-id-lookups

feature

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20923-dcim-templates

20044-elevation-stuck-lightmode

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v4.5-beta1-release

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20766-fix-german-translation-code-literals

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Reference: starred/netbox#7236