1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#lang racket
(provide
;; Struct definitions
nutrient-target
nutrient-target?
nutrient-target-id nutrient-target-effective-on
;; SQL CRUD
(contract-out
[create-nutrient-target! (-> string?
(listof (cons/c
nutrient?
number?))
nutrient-target?)]
[get-nutrient-targets (->* ()
(#:id
(or/c #f exact-nonnegative-integer?)
#:effective-on
(or/c #f string?))
(listof nutrient-target?))]
[get-nutrient-target (->* ()
(#:id
(or/c #f exact-nonnegative-integer?)
#:effective-on
(or/c #f string?))
(or/c nutrient-target? #f))]
[get-nutrient-target-values (-> nutrient-target?
(listof (cons/c
nutrient?
number?)))]
[get-nutrient-target-value (-> nutrient-target?
nutrient?
number?)]
[get-latest-nutrient-target-value (-> nutrient? number?)]
#; [update-nutrient-target! (->* (nutrient-target?)
(#:effective-on (or/c #f string?)
#:nutrient-values (or/c #f (listof (cons/c
nutrient?
number?))))
(or/c nutrient-target? #f))]
[delete-nutrient-target! (-> nutrient-target?
void?)]))
(require racket/contract
db
sql
"../db/conn.rkt"
"nutrient.rkt")
;; Instances of this struct are persisted in the nutrient_targets table.
(struct nutrient-target (id effective-on) #:transparent)
;; CREATE
(define (create-nutrient-target! effective-on nutrient-values)
(define existing-nutrient-target (get-nutrient-target #:effective-on effective-on))
(define (new-nutrient-target)
(with-tx
(query-exec (current-conn)
(insert #:into nutrient_targets
#:set [effective_on ,effective-on]))
(define nm-id (nutrient-target-id (get-nutrient-target #:effective-on effective-on)))
(query-exec (current-conn)
(insert #:into nutrient_value_sets
#:set [nutrient_target_id ,nm-id]))
(define nvs-id (query-value (current-conn)
(select id
#:from nutrient_value_sets
#:where (= nutrient_target_id ,nm-id))))
(for ([nv nutrient-values])
(match nv
[(cons n v)
(query-exec (current-conn)
(insert #:into nutrient_values
#:set
[value_set_id ,nvs-id]
[nutrient_id ,(nutrient-id n)]
[value_ppm ,v]))])))
(get-nutrient-target #:effective-on effective-on))
(or existing-nutrient-target
(new-nutrient-target)))
;; READ
(define (get-nutrient-targets #:id [id #f]
#:effective-on [effective-on #f])
(define (where-expr)
(define clauses
(filter values
(list (and id (format "id = ~e" id))
(and effective-on (format "effective_on = ~e" effective-on)))))
(cond
[(null? clauses) ""]
[else (format "WHERE ~a" (string-join clauses " AND "))]))
(define query (string-join
`("SELECT id, effective_on"
"FROM nutrient_targets"
,(where-expr)
"ORDER BY id ASC")))
(for/list ([(id* effective-on*)
(in-query (current-conn) query)])
(nutrient-target id* effective-on*)))
(define (get-nutrient-target #:id [id #f]
#:effective-on [effective-on #f])
(define (where-expr)
(define clauses
(filter values
(list
(and id (format "id = ~e" id))
(and effective-on (format "effective_on = ~e" effective-on)))))
(cond
[(null? clauses) ""]
[else (format "WHERE ~a" (string-join clauses " AND "))]))
(define query (string-join
`("SELECT id, effective_on"
"FROM nutrient_targets"
,(where-expr)
"ORDER BY id ASC"
"LIMIT 1")))
(match (query-maybe-row (current-conn) query)
[(vector id* effective-on*)
(nutrient-target id* effective-on*)]
[#f #f]))
(define (get-nutrient-target-values nutrient-target)
(for/list ([(nutrient-id name formula value_ppm)
(in-query (current-conn)
(string-join
'("SELECT n.id, n.canonical_name, n.formula, nv.value_ppm"
"FROM nutrient_values nv"
"JOIN nutrient_value_sets nvs ON nvs.id = nv.value_set_id"
"JOIN nutrient_targets nm ON nm.id = nvs.nutrient_target_id"
"JOIN nutrients n ON n.id = nv.nutrient_id"
"WHERE nm.id = $1"))
(nutrient-target-id nutrient-target))])
(cons (nutrient nutrient-id name formula) value_ppm)))
(define (get-nutrient-target-value nutrient-target nutrient)
(query-maybe-value (current-conn)
(string-join
'("SELECT value_ppm"
"FROM nutrient_values nv"
"JOIN nutrient_value_sets nvs ON nvs.id = nv.value_set_id"
"JOIN nutrient_targets nm ON nm.id = nvs.nutrient_target_id"
"WHERE nm.id = $1 AND nv.nutrient_id = $2"))
(nutrient-target-id nutrient-target)
(nutrient-id nutrient)))
(define (get-latest-nutrient-target-value nutrient)
(query-maybe-value (current-conn)
(string-join
'("SELECT value_ppm"
"FROM nutrient_values nv"
"JOIN nutrient_value_sets nvs ON nvs.id = nv.value_set_id"
"JOIN nutrient_targets nm ON nm.id = nvs.nutrient_target_id"
"WHERE nv.nutrient_id = $1"
"ORDER BY nm.effective_on DESC"
"LIMIT 1"))
(nutrient-id nutrient)))
;; UPDATE
#; (define (update-nutrient-target! nutrient-target
#:effective-on [effective-on #f]
#:nutrient-values [nutrient-values '()])
(define nm-id (nutrient-target-id nutrient-target))
(define (nvs-id nm-id)
(query-maybe-row (current-conn)
(select id
#:from nutrient_value_sets
#:where (= nutrient_target_id ,nm-id))))
(with-tx
(when effective-on
(query-exec (current-conn)
(update nutrient_targets
#:set [effective_on ,effective-on]
#:where (= id ,id))))
(unless (null? nutrient-values)
(upsert-nutrient-values nm-id))
(get-nutrient-target #:id id)))
#; (define (upsert-nutrient-values nutrient-target-id)
(define maybe-nvs-id (nvs-id nm-id))
(case maybe-nvs-id
[(#f)
(query-exec (current-conn)
(insert #:into nutrient_values_sets
#:set
[nutrient_target_id ,id]))
(define new-nvs-id (nvs-id nm-id))
(query-exec (current-conn)
(string-join
'("INSERT INTO nutrient_values"
"VALUES $1 $2 $3"
""))
new-nvs-id
)]
[else
(query-exec (current-conn)
(update nutrient_target_values
#:set [value ,value]
#:where (and (= target_id ,target-id)
(= nutrient_id ,nutrient-id))))]))
;; DELETE
(define (delete-nutrient-target! nutrient-target)
(define id (nutrient-target-id nutrient-target))
(query-exec (current-conn)
(delete #:from nutrient_targets
#:where (= id ,id))))
|
