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| author | Marius Peter <dev@marius-peter.com> | 2025-11-02 19:40:29 +0100 |
|---|---|---|
| committer | Marius Peter <dev@marius-peter.com> | 2025-11-02 19:40:29 +0100 |
| commit | 1b23eec4517a8628a9564c9ed25923e6c9ea5bd8 (patch) | |
| tree | f527ed4ad667fc0ac005c8300dd151d17d06facd /models/nutrient-measurement.rkt | |
| parent | b310f6e261e623237f0379c954df040cf4e57a4c (diff) | |
Add custom display functions for certain model entities.
Diffstat (limited to 'models/nutrient-measurement.rkt')
| -rw-r--r-- | models/nutrient-measurement.rkt | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/models/nutrient-measurement.rkt b/models/nutrient-measurement.rkt index d3631de..e73a10e 100644 --- a/models/nutrient-measurement.rkt +++ b/models/nutrient-measurement.rkt @@ -31,7 +31,18 @@ "nutrient.rkt") ;; Instances of this struct are persisted in the nutrient_measurements table. -(struct nutrient-measurement (id measured-on nutrient-values) #:transparent) +(struct nutrient-measurement (id measured-on nutrient-values) + #:transparent + #:property prop:custom-write + (λ (v out _) + (fprintf out "Measurement #~a on ~a\n" + (nutrient-measurement-id v) + (nutrient-measurement-measured-on v)) + (for ([nv (nutrient-measurement-nutrient-values v)]) + (match-define (cons n v) nv) + (fprintf out "~a ~a\n" + (~a (nutrient-name n) #:min-width 14) + (~a v #:max-width 6 #:align 'right))))) ;; CREATE |