DiamondLightSource/dodal

Convert location to domain name in BeamlinePrefix

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#1,916 opened on Feb 11, 2026

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good first issue

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Description

Currently, we do this:

BL = "b01-1"
PREFIX = BeamlinePrefix(BL, suffix="C")  #PREFIX=="BL01C"

where b01-1 is the 'location' (i.e., the short domain) and BL01C is the domain name.

It would be nicer to provide BeamlinePrefix with the location, allowing it to do these conversions:

ixx -> BLxxI
ixx-1 -> BLxxJ
kxx -> BLxxK
bxx -> BLxxB
bxx-1 -> BLxxC

and accept an override to select the trailing domain letter, for exceptions such as i13-2

Acceptance Criteria

  • Do not have to provide suffix for known location->domain conventions

Contributor guide

Research direction
Implement the conversion logic from location to domain name based on the given mapping.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75