Commit | Line | Data |
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579597e3 | 1 | (in-package :meta-model) |
2 | ||
3 | (eval-when (:compile-toplevel :load-toplevel :execute) | |
4 | (use-package :clsql)) | |
5 | ||
6 | (export 'def-meta-model-from-table) | |
7 | (export 'def-meta-models) | |
8 | (export 'def-view-class/meta) | |
9 | (export 'list-base-classes) | |
10 | ||
47a72814 | 11 | |
12 | ||
9d6c69fb | 13 | (defmethod sync-instance ((view clsql:standard-db-object) &key (fill-gaps-only nil) (database *default-database*)) |
47a72814 | 14 | (labels ((sym->sql (sym) (string-downcase (substitute #\_ #\- (string sym)))) |
15 | (get-def (slot) (caar (query | |
16 | (format nil "SELECT DISTINCT adsrc from pg_attrdef join pg_attribute on attnum = adnum where adrelid = (select oid from pg_class where relname = '~A') and attname = '~A'" (sym->sql (class-name (class-of view))) (sym->sql slot))))) | |
a6644385 | 17 | (get-default-value (slot) |
18 | (let ((def (get-def slot))) | |
19 | (if def | |
9d6c69fb | 20 | (caar (query (format nil "SELECT ~A" def))))))) |
47a72814 | 21 | |
22 | (dolist (slot (list-slots view)) | |
23 | (when (and (primary-key-p view slot) | |
24 | (or (not (slot-boundp view slot)) | |
25 | (equal (slot-value view slot) nil))) | |
9d6c69fb DC |
26 | (setf (slot-value view slot) (get-default-value slot)) |
27 | (when (and (primary-key-p view slot) | |
28 | (not (slot-value view slot)) | |
29 | (not fill-gaps-only)) | |
30 | (error "No default value for primary key : ~A" slot)))) | |
31 | (when fill-gaps-only | |
32 | (update-objects-joins (list view)) | |
33 | (return-from sync-instance)) | |
34 | (update-records-from-instance view :database database) | |
35 | (update-instance-from-records view :database database) | |
36 | (update-objects-joins (list view)))) | |
47a72814 | 37 | |
38 | ||
39 | ||
579597e3 | 40 | (defparameter *clsql-base-classes* (list) ) |
41 | ||
42 | (defmethod list-base-classes ((type (eql :clsql))) | |
43 | *clsql-base-classes*) | |
44 | ||
9d6c69fb | 45 | (defmethod def-base-type-class-expander ((base-type (eql :clsql)) (model meta-model-class) (name t) (args t)) |
579597e3 | 46 | `(def-view-class ,name () |
47 | ,(meta-model.metadata model))) | |
48 | ||
9d6c69fb | 49 | (defmethod def-base-type-class-expander :after ((base-type (eql :clsql)) (model meta-model-class) (name t) (args t)) |
579597e3 | 50 | (unless (member name *clsql-base-classes*) |
51 | (setf *clsql-base-classes* (cons name *clsql-base-classes*)))) | |
52 | ||
53 | (defparameter *sql-type-map* '((:INT4 integer) (:TEXT string) (:VARCHAR string) (:TIMESTAMP clsql-sys::wall-time) (:NUMERIC number)(:BYTEA string))) | |
54 | ||
55 | (defun gen-type (table column) | |
56 | (cadr (assoc | |
57 | (cadr (assoc | |
58 | column | |
59 | (list-attribute-types table) | |
60 | :test #'equalp )) | |
61 | *sql-type-map*))) | |
62 | ||
63 | (defun sql->sym (name &optional (package nil)) | |
64 | (flet ((xform (x) | |
65 | (string-upcase (substitute #\- #\_ x)))) | |
66 | (if package | |
67 | (intern (xform (string name)) package) | |
68 | (intern (xform (string name)))))) | |
69 | ||
9d6c69fb | 70 | (defun table->slots (table pkey &optional (accesor-prefix table) (prefix-all-p nil)) |
579597e3 | 71 | (mapcar |
72 | #'(lambda (col) | |
9d6c69fb DC |
73 | (flet ((accessor-name (col) |
74 | (let ((name (sql->sym col))) | |
75 | (if (or prefix-all-p | |
76 | (and (fboundp name) | |
77 | (eq (type-of (symbol-function name)) 'function))) | |
78 | (sql->sym (concatenate 'string | |
79 | (string accesor-prefix) "-" col)) | |
80 | name)))) | |
81 | ||
82 | `(,(sql->sym col) | |
83 | :accessor ,(accessor-name col) | |
84 | :initarg ,(sql->sym col "KEYWORD") | |
85 | :type ,(gen-type table col) | |
86 | :db-kind | |
87 | ,(if (equalp col pkey) | |
88 | `:key | |
89 | `:base)))) | |
579597e3 | 90 | (list-attributes table))) |
91 | ||
92 | (defun view-class-definition-list () | |
93 | (mapcar #'(lambda (x) `(def-meta-model-from-table ,x)) | |
94 | (list-tables))) | |
95 | ||
96 | (defmacro def-meta-models () | |
97 | (let ((defs (view-class-definition-list))) | |
98 | `(progn ,@defs))) | |
99 | ||
100 | ||
579597e3 | 101 | (defun get-pkeys () |
102 | (let ((keys '())) | |
103 | (dolist (row (get-pkeys-query)) | |
104 | (setf keys (acons (car row) (list (cadr row)) keys))) | |
105 | keys)) | |
106 | ||
107 | (defun get-pkeys-query() | |
108 | (query | |
109 | "SELECT pg_class.relname, pg_attribute.attname, pg_catalog.quote_ident(conname) AS constraint_n | |
110 | , pg_catalog.pg_get_indexdef(d.objid) AS constraint_definition | |
111 | , CASE | |
112 | WHEN contype = 'p' THEN | |
113 | 'PRIMARY KEY' | |
114 | ELSE | |
115 | 'UNIQUE' | |
116 | END as constraint_type | |
117 | FROM | |
118 | pg_class, pg_attribute, | |
119 | pg_catalog.pg_constraint AS c | |
120 | JOIN pg_catalog.pg_depend AS d ON (d.refobjid = c.oid) | |
121 | WHERE contype IN ('p', 'u') | |
122 | AND deptype = 'i' | |
123 | and conrelid = pg_class.oid | |
124 | and pg_attribute.attnum = ANY (c.conkey) | |
125 | and pg_attribute.attrelid = pg_class.oid")) | |
126 | ||
127 | ;;here is how this works | |
128 | ;;from the postgres system tables we get | |
129 | ;;list of all the has-a relationships. | |
130 | ;;the inverse of a has-a is an implicit has-many | |
131 | ;;and any relation having more than one foreign key | |
132 | ;;is a join table hosting a many-to-many relationship | |
133 | ||
134 | (defun get-fkey-explosions () | |
135 | (let ((key-table (get-fkey-explosions-query)) | |
136 | (keys '())) | |
137 | (dolist (row key-table) | |
138 | (setf row (mapcar #'(lambda (x) | |
139 | (sql->sym x)) | |
140 | row)) | |
141 | ;;this one does the has-a | |
142 | (setf keys (acons (car row) (gen-has-a row) | |
143 | keys)) | |
144 | ;;the inverse of the previous represents a has-many. | |
145 | (setf keys | |
146 | (acons (fourth row) (gen-has-many row) | |
147 | keys)) | |
148 | ||
149 | ;;many-to-many | |
150 | (dolist (mrow | |
151 | (remove-if #'(lambda (r) (or (not (equal (car row) (car r))) | |
152 | (equal (last row) (last r)))) | |
153 | (mapcar #'(lambda (x) | |
154 | (mapcar #'sql->sym x)) | |
155 | key-table))) | |
156 | (setf keys (acons (fourth row) | |
157 | (gen-many-to-many mrow (third row) (second row)) | |
158 | keys)))) | |
159 | keys )) | |
160 | ||
161 | ||
162 | (defun get-fkey-explosions-query () | |
163 | ;;these query's are a mess, i don't even know how they work :) | |
164 | (query " | |
165 | SELECT pg_class.relname, | |
166 | pg_attribute.attname, | |
167 | fa.attname , | |
168 | f.relname | |
169 | FROM pg_class, | |
170 | pg_constraint, | |
171 | pg_attribute, | |
172 | pg_class as f , | |
173 | pg_attribute as fa | |
174 | WHERE pg_class.relname in (select tablename from pg_tables where schemaname = 'public') | |
175 | AND pg_class.oid = pg_constraint.conrelid | |
176 | AND pg_attribute.attnum = ANY (pg_constraint.conkey) | |
177 | AND pg_attribute.attrelid = pg_class.oid | |
178 | AND f.oid = confrelid | |
179 | AND fa.attrelid = f.oid | |
180 | AND fa.attnum = ANY (pg_constraint.confkey)")) | |
181 | ||
182 | ||
183 | ;; i chose keyword args here so as to make the code more understandable. | |
184 | ;; it didn't really work. | |
185 | (defun gen-join-slot (&key name home-key foreign-key join-class (set nil)) | |
186 | `(,(intern name) | |
187 | :accessor ,(intern name) | |
188 | :db-kind :join | |
189 | :db-info (:join-class ,join-class | |
190 | :home-key ,home-key | |
191 | :foreign-key ,foreign-key | |
192 | :set ,set))) | |
193 | ||
194 | (defun gen-has-a (row) | |
195 | (gen-join-slot | |
196 | :name | |
197 | (format nil "~A->~A" (string (car row))(string (second row))) | |
198 | :home-key (second row) | |
199 | :foreign-key (third row) | |
200 | :join-class (fourth row))) | |
201 | ||
202 | (defun gen-has-many (row) | |
203 | (gen-join-slot | |
204 | :name | |
205 | (format nil "~A->~A" (string (car row))(string (second row))) | |
206 | :home-key (third row) | |
207 | :foreign-key (second row) | |
208 | :join-class (car row) | |
209 | :set t)) | |
210 | ||
211 | (defun gen-many-to-many (row home-key foreign-key) | |
212 | (let ((name (sql->sym (string-upcase (format nil "~A->~A" (string (car row)) (string (second row))))))) | |
213 | (setf row (mapcar #'sql->sym row)) | |
214 | `(,name | |
215 | :accessor ,name | |
216 | :db-kind :join | |
217 | :db-info (:join-class ,(car row) | |
218 | :home-key ,home-key | |
219 | :foreign-key ,foreign-key | |
220 | :target-slot ,name | |
221 | :set t)))) | |
222 | ||
9d6c69fb DC |
223 | (defmethod update-records-from-instance :before ((view clsql::standard-db-object) &key database) |
224 | (declare (ignorable database)) | |
225 | (labels ((sym->sql (sym) (string-downcase (substitute #\_ #\- (string sym)))) | |
226 | (get-def (slot) (caar (query | |
227 | (format nil "SELECT DISTINCT adsrc from pg_attrdef join pg_attribute on attnum = adnum where adrelid = (select oid from pg_class where relname = '~A') and attname = '~A'" (sym->sql (class-name (class-of view))) (sym->sql slot))))) | |
228 | (get-default-value (slot) (caar (query (format nil "SELECT ~A" (get-def slot)))))) | |
229 | ||
230 | (dolist (slot (list-slots view)) | |
231 | (when (and (primary-key-p view slot) | |
232 | (or (not (slot-boundp view slot)) | |
233 | (equal (slot-value view slot) nil))) | |
234 | (setf (slot-value view slot) (get-default-value slot)))))) | |
235 | ||
236 | ;;;; | |
237 | ||
238 | (defmacro def-view-class/meta (name supers slots &rest args) | |
239 | "Create and instrument CLSQL view-class NAME and | |
240 | appropriate meta-model class(its default name is %NAME-meta-model). | |
241 | (DEF-VIEW-CLASS/META NAME SUPERS SLOTS &key (MODEL-NAME (intern (format nil \"%~S-META-MODEL\" NAME))) &rest ARGS)." | |
242 | (let ((model-name (cond ((eq :model-name (car args)) | |
243 | (pop args) ; remove keyword | |
244 | (pop args)) ; get value | |
245 | (t (intern (format nil "%~S-META-MODEL" name)))))) | |
579597e3 | 246 | `(progn |
9d6c69fb DC |
247 | (def-meta-model ,model-name ,supers ,slots (:base-type :clsql) ,@args) |
248 | (def-base-class ,name (,model-name) ,@args)))) | |
249 | ||
250 | (defmacro def-view-class/table (table &optional (name (sql->sym table)) model-name) | |
579597e3 | 251 | "takes the name of a table as a string and |
252 | creates a clsql view-class" | |
253 | (let* ((pkey (cadr (assoc table (get-pkeys) :test #'equalp))) | |
9d6c69fb | 254 | (table-slots (table->slots table pkey name)) |
579597e3 | 255 | (join-slots |
256 | (let ((slots nil)) | |
257 | (dolist (exp (get-fkey-explosions)) | |
258 | (when (equalp (car exp) (sql->sym table)) | |
259 | (setf slots (cons (cdr exp) slots)))) | |
260 | slots))) | |
9d6c69fb DC |
261 | `(def-view-class/meta ,name |
262 | () | |
263 | ,(append table-slots join-slots) | |
264 | ,@(when model-name (list :model-name model-name))))) | |
265 | ||
266 | (def-compare-expr standard-db-object expr-= sql-=) | |
267 | (def-compare-expr standard-db-object expr-< sql-<) | |
268 | (def-compare-expr standard-db-object expr-> sql->) | |
269 | (def-compare-expr standard-db-object expr-ends-with sql-like :value-format "%~A") | |
270 | (def-compare-expr standard-db-object expr-starts-with sql-like :value-format "~A%") | |
271 | (def-compare-expr standard-db-object expr-contains sql-like :value-format "%~A%") | |
272 | ||
273 | (def-logical-expr standard-db-object expr-and #'sql-and) | |
579597e3 | 274 | |
9d6c69fb | 275 | (def-logical-expr standard-db-object expr-or #'sql-or) |
579597e3 | 276 | |
9d6c69fb | 277 | (def-logical-expr standard-db-object expr-not #'sql-not) |
579597e3 | 278 | |
9d6c69fb DC |
279 | (defmethod select-instances ((instance standard-db-object) &rest query) |
280 | (unless (keywordp (car query)) | |
281 | (setf query (cons :where query))) | |
282 | (apply #'select (class-name (class-of instance)) :flatp t query)) |