--- /dev/null
+(in-package :lisp-on-lines)
+
+;;;; * Relational Attributes
+
+
+;;;; ** has-a
+;;;; Used for foreign keys, currently only works with clsql.
+
+(defattribute has-a ()
+ ()
+ (:default-properties
+ :has-a nil
+ :test 'meta-model::generic-equal))
+
+;;
+(define-layered-method attribute-value (object (attribute has-a))
+ (multiple-value-bind (obj key class)
+ (meta-model:explode-foreign-key object (slot-name attribute) :nilp t)
+ (if (persistentp object)
+ obj
+ (first (select class
+ :where [= [slot-value class key] (call-next-method)]
+ :flatp t
+ )))))
+
+(define-layered-method (setf attribute-value) ((value standard-object) object (attribute has-a))
+ (let ((val (slot-value value (find-if (curry #'primary-key-p value) (list-keys value)))))
+ (setf (attribute-value object attribute) val)))
+
+
+
+(define-layered-function find-all-foreign-objects (o a))
+
+(define-layered-method find-all-foreign-objects (object (attribute has-a))
+ (select (meta-model:find-join-class object (slot-name attribute)) :flatp t))
+
+(defdisplay ((attribute has-a) object)
+ (let ((args (plist-union (description.properties attribute) (has-a attribute)))
+ (val (attribute-value object attribute)))
+ (when val
+ (setf (getf args :type)
+ 'lol::one-line))
+ (apply #'display* val
+ args)))
+
+
+(defdisplay
+ :in-layer editor ((attribute has-a) object)
+ (<ucw:select
+ :accessor (attribute-value object attribute)
+
+ :test (test attribute)
+ (dolist* (obj (find-all-foreign-objects object attribute))
+ (<ucw:option
+ :value obj
+ (display* obj :layers '(+ as-string))))))
+
+
+;;;; ** Has-Many attribute
+
+(defattribute has-many ()
+ ()
+ (:default-properties
+ :add-new-label "Add New"
+ :sort-arguments (list #'< :key #'(lambda (x) (funcall (car (list-keys x)) x))))
+ (:default-initargs
+ :type 'lol::one-line))
+
+(define-layered-method
+ attribute-value (object (has-many has-many))
+ (slot-value object (slot-name has-many)))
+
+(defdisplay ((attribute has-many) object)
+ ;
+ ;(<ucw:submit :action (add-to-has-many slot instance) :value (add-new-label attribute))
+
+ (<:div :style "clear:both;"
+ (let* ((i (apply #'sort (slot-value object (slot-name attribute))
+ (sort-arguments attribute))))
+ (<:ul
+ (dolist* (x i)
+ (<:li (display* x
+ :type 'lol::as-string
+ :layers '(+ wrap-link - label-attributes))))))))
+
+
+(defun find-many-to-many-class (slot-name instance)
+ (let* ((imd (getf (meta-model::find-slot-metadata instance slot-name)
+ :db-info))
+ (jc (make-instance (getf imd :join-class)))
+ (jcmd (getf (meta-model::find-slot-metadata jc (getf imd :target-slot))
+ :db-info)))
+ (getf jcmd :join-class)))
+
+
+(defattribute many-to-many ()
+ ())
+
+
+
+(defdisplay ((attribute many-to-many) object)
+ (<:as-html "ASDASD"))
+
+ #+nil(let ((instances (select-instances object t))
+ new-instance)
+ (<:ul
+ (<:li (<ucw:button :action (add-new-relation component object (.get slot-name))
+ (<:as-html "Add New")))
+ (<:li (<ucw:button :action (add-new-relation component object new-instance)
+ (<:as-html "Add:"))
+ (<ucw:select :accessor new-instance
+ (arnesi:dolist* (i instances)
+ (<ucw:option
+ :value i
+ (display component i :type 'one-line)))))
+ (dolist* (i (attribute-value object attribute))
+ (<:li
+ (<ucw:a :action (call-view ((car i) (action-view slot) (ucw::parent slot)))
+ (<:as-html "(view) "))
+ (<ucw:a :action (delete-relationship slot (second i) instance)
+ (<:as-html "(remove) "))
+ (display component object)))))
+ ;(display component (mapcar #'car (slot-value object (.get :slot-name))))
+
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