(in-package :meta-model)
-(defvar *meta-models* nil)
-
-(defun list-meta-models ()
- *meta-models*)
+(defvar *meta-models* (make-hash-table))
(defclass meta-model-class ()
- ((metadata
+ ((name
+ :accessor meta-model.name
+ :initarg :name
+ :initform nil)
+ (slots
+ :accessor meta-model.slots
+ :initarg :slots
+ :initform nil)
+ (superclasses
+ :accessor meta-model.superclasses
+ :initarg :superclasses
+ :initform nil)
+ (options
+ :accessor meta-model.options
+ :initarg :options
+ :initform nil)
+ (metadata
:accessor meta-model.metadata
:initarg :metadata
:initform nil)
nil)
(defmethod meta-model.metadata ((self symbol))
- (meta-model.metadata (make-instance self)))
-
-(defun gen-supers (supers)
- (let (subclassp)
- (dolist (x supers)
- (when (member x (list-meta-models))
- (setf subclassp t)))
- (if subclassp
- supers
- (cons 'meta-model-class supers))))
-
-(defmethod %def-meta-model ((base-type t) name supers slots &rest options)
- `(eval-when (:compile-toplevel :load-toplevel :execute)
- (defclass ,name ,(gen-supers supers)
- ()
- (:default-initargs :metadata ',slots :base-type ,base-type))))
-
-
-(defmacro def-meta-model (name supers slots &rest options)
- `(eval-when (:compile-toplevel :load-toplevel :execute)
- (when (not (member (quote ,name) *meta-models*))
- (setf *meta-models* (cons (quote ,name) *meta-models*)))
+ (meta-model.metadata (gethash self *meta-models*)))
+
+(defmethod meta-model.metadata ((self standard-object))
+ (meta-model.metadata (class-name (class-of self))))
- (let ((class ,(%def-meta-model (cadr (or (assoc :base-type options) '(t t))) name supers slots options)))
- class)))
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defmethod make-meta-model (name supers slots options)
+ (let ((m (make-instance 'meta-model-class
+ :name name
+ :superclasses supers
+ :slots slots
+ :options options
+ ;; TODO : the metadata should inherit any superclasses
+ :metadata slots)))
+ (setf (gethash name *meta-models*) m))))
+
+(defmacro define-meta-model (name supers slots &rest options)
+ `(make-meta-model ',name ',supers ',slots ',options))
-(defgeneric def-base-type-class-expander (base-type model name args))
+(defgeneric generate-base-class-definition (base-type model name args))
-(defmethod def-base-class-expander ((model t) name args)
- (def-base-type-class-expander (meta-model.base-type model) model name args))
+(defmethod generate-base-class-expander ((model t) name args)
+ (generate-base-class-definition (meta-model.base-type model) model name args))
-(defmethod base-class-name ((model t))
- (class-name (class-of (meta-model.instance model))))
(defmethod view-class-metadata ((model t))
"
:test-key :target-slot
:return-full t)))
-(defmethod explode-foreign-key ((model clsql:standard-db-object) slot)
+(defmethod explode-foreign-key ((model clsql:standard-db-object) slot &key (createp t))
"returns the clsql view-class joined on SLOT"
(dolist (s (list-join-attributes model))
(when (equal (getf (cdr s) :home-key) slot)
- (let ((val (slot-value model (car s))))
- (return-from explode-foreign-key
- (values (if val val (make-instance (getf (cdr s) :join-class)))
- (getf (cdr s) :foreign-key)))))))
+ (let* ((fkey (getf (cdr s) :foreign-key))
+ (new (sync-instance (make-instance (getf (cdr s) :join-class))))
+ (val (or (slot-value model (car s))
+ (progn
+ (when createp
+ (setf
+ (slot-value model slot)
+ (slot-value new fkey))
+ (sync-instance model)
+ (slot-value model (car s)))))))
+
+ (return-from explode-foreign-key
+ (values val fkey))))))
(defun find-join-helper (foreign-key)
(lambda (class slot)