:initform nil)
(base-type
:accessor meta-model.base-type
- :initform 'clsql)))
+ :initarg :base-type
+ :initform :clsql)))
(defmethod meta-model.metadata ((self (eql nil)))
nil)
(defmethod %def-meta-model ((base-type t) name supers slots &rest options)
`(defclass ,name ,(gen-supers supers)
()
- (:default-initargs :metadata ',slots)))
+ (:default-initargs :metadata ',slots :base-type ,base-type)))
(defmacro def-meta-model (name supers slots &rest options)
(let ((class ,(%def-meta-model (cadr (or (assoc :base-type options) '(t t))) name supers slots options)))
class)))
-(defgeneric def-base-class-expander (model base-type name args))
+(defgeneric def-base-type-class-expander (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))
(defmacro def-base-class (name (model) &rest args)
(let ((i (make-instance model)))
- `(progn
- ,(def-base-class-expander i :clsql name args)
+ `(prog1
+ (eval ,(def-base-class-expander i name args))
(defmethod meta-model.metadata ((m ,name))
',(meta-model.metadata i)))))
"returns the clsql view-class joined on SLOT"
(dolist (s (list-join-attributes model))
(when (equal (getf (cdr s) :home-key) slot)
- (return-from explode-foreign-key (slot-value model (car s))))))
+ (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)))))))
(defun find-join-helper (foreign-key)
(lambda (class slot)
"returns the SLOT in the foreign VIEW-CLASS that joins with FOREIGN-KEY"
(car (list-relations-helper view (find-join-helper foreign-key) :return-key :foreign-key)))
+(defmethod explode-has-many ((view t) join-slot)
+ "returns the class of the join as the primary value, the second and third value is the home key and the foreign key"
+ (let ((att (assoc join-slot (list-join-attributes view))))
+ (values (getf (cdr att) :join-class)
+ (getf (cdr att) :home-key)
+ (getf (cdr att) :foreign-key))))
+
+(defgeneric expr-= (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-> (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-< (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-ends-with (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-starts-with (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-contains (instance slot-name value)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-and (instance &rest args)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-or (instance &rest args)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric expr-not (instance &rest args)
+ (:documentation "Create search expression for appropriate backend."))
+
+(defgeneric select-instances (instance &rest args)
+ (:documentation "Select instances in backend dependent way"))
+(defmacro def-compare-expr (instance-type name expr &key value-format)
+ `(defmethod ,name ((instance ,instance-type) slot-name value)
+ (declare (ignore instance))
+ (,expr slot-name ,(typecase value-format
+ (null 'value)
+ (string `(format nil ,value-format value))
+ (t `(,value-format value))))))
+(defmacro def-logical-expr (instance-type name expr)
+ `(defmethod ,name ((instance ,instance-type) &rest args)
+ (declare (ignore instance))
+ (apply ,expr args)))
\ No newline at end of file