Gotchas! =======
1. All items for a page *must* be part of a list!
OK: (list (function1 param1)(function2 param2)) NOT OK: (begin (function1 param1)(function2 param2))
Various components ==================
====================================================================== 1. Create a link.
(s:null "[" (s:a name 'href (s:link-to (string-append "location/" (string-intersperse p "/") ""))) "] ")))
====================================================================== 2. Call current page with new param
In view.scm:
(s:center "[" (s:a 'href (s:link-to "polls" 'id (begin (poll:poll 'fill-polls) (poll:poll 'get-next-poll))) "Go to the next poll") "]")
In control.scm:
(let ((poll-id (s:get-param 'id))) ;; do stuff based on poll-id
====================================================================== 3. Call an action on a specific page
(s:a 'href (s:link-to "polls" 'id (poll:poll 'get 'id) 'action "poll.edit") "Suggest changes to this poll")
NOT TRUE! This calls fuction poll.edit (should be in control.scm). Parameter set is 'id to a poll num.
====================================================================== 4. A complex link example
(s:a "Reply" 'href (s:link-to (s:current-page) 'action "discussion.reply" ;; <page>.<action> 'reply_to (number->string (hash-table-ref row 'posts.id)) 'id (s:get "discussion.parent_object_id")) "reply")
;; use (s:get-param to get the 'id, or 'reply_to values
====================================================================== 5. Get and set a session var
(s:session-var-get "keyname") (s:session-var-set! "keyname" "value")
5.1 Page local vars
(s:set! key val) (s:get key)
====================================================================== 6. make a selection drop down
In view.scm:
(s:select '(("World" 0)("Country" 1)("State" 2)("Town/City" 3)) 'name 'scope)
In control.scm:
(let ((scope (s:get-input 'scope))) ....
====================================================================== 7. Simple error reporting
In control.scm: (s:set-err "You must provide an email address")
In view.scm: (s:get-err s:err-font)
Or: (s:get-err (lambda (x)(s:err-font x (s:br))))
====================================================================== 8. Misc useful stuff
i. Lazy/safe string->number
(s:any->number val)
ii. Random string
(session:make-rand-string len)
iii. string to number for pgint
(s:any->pgint val)
====================================================================== 9. Forms and input
(s:form 'action "login.login" 'method "post" (s:input-preserve 'type "text" 'name "email-address" 'size "16" 'maxlength "30") (s:input 'type "submit" 'name "form-name" 'value "login"))
(s:get-input 'email-address)
To preserve the input simply do a set of the value on the 'name field: (s:set! "email-address" "matt@kiatoa.com")
====================================================================== 10.