- ajax path selector event proc #!key target (action 'html) (method 'POST) (arguments '()) success no-session no-db vhost-root-path live on prelude update-targets cache error-handler use-sxml strictprocedure
path is the URL path (a string) of the server side handler. This path is placed under the (app-root-path)/(ajax-namespace) path. So, if your app-root-path is "my-app", your ajax-namespace is "ajax" and you use "do-something" as the first argument to ajax, the URL for the server side handler would be "/my-app/ajax/do-something".
selector is the selector for the DOM element to be observed. If it is a quoted symbol, awful generates a jQuery selector by DOM id (e.g., 'my-selector generates "#my-selector"). If it is a string, awful uses it as-is to generate the jQuery selector (e.g., "input[name^=omg]" generates "input[name^=omg]").
event (a quoted symbol or a list) is the event(s) to be observed. If it is a quoted symbol (e.g., 'click), only this event will be bound. If event is a list of events, all the events from the list will be bound.
proc is a no-argument procedure to be executed on the server side.
The target keyword parameter is the id of the DOM element to be affected by the result of proc.
The method (a quoted symbol, usually 'GET or 'POST) keyword parameter is the HTTP method to be used by the ajax request.
The arguments keyword parameter is an alist mapping request variables (symbols) to their values (strings). ajax uses these arguments to assembly the query string or the request body to send to the server when performing the ajax request.
If use-sxml is #t, it specifies that the ajax handler produces SXML code instead of strings.
arguments: '((var1 . "$('#var1').val()") (var2 . "$('#var2').val()"))
If the no-session keyword parameter is #t, it means that no session should be considered (ajax implicit sends the session identifier when no-session is #f).
If the no-db keyword parameter is #t, it means that the should be no attempt to connect the database, even when database usage is activated by enable-db and db-credentials is not #f.
The vhost-root-path keyword parameter (a string) is the vhost root path. It is useful for explicitly separate pages defined using the same path (see define-page) but for different vhosts.
The on keyword parameter (boolean) indicates whether ajax should use jQuery's on method (see http://api.jquery.com/on/). If on gets bound to #t, awful will generate code to start delegating events from the document DOM element. If on gets bound to a symbol, awful will generate code to start delegating events from DOM element whose id is the given symbol. If on gets bound to a string, awful will generate code to start delegating events from DOM element which matches the given string representing a selector. The on keyword parameter was introduced in awful 0.39.2.
The live keyword parameter (boolean) indicates whether ajax should use jQuery's live method (see http://api.jquery.com/live/). Note that the live method was deprecated in jQuery 1.7 and removed in version 1.9. If you are using a more recent version of jQuery, see the on keyword parameter for ajax (introduced in awful 0.39.2).
The update-targets keyword parameter a boolean indicating whether multiple targets should be updated upon ajax response. When update-targets is used, the procedure proc used as argument to ajax should yield an alist as result. The alist maps DOM elements identifiers to their corresponding values.
Here's an example:
(cond-expand (chicken-4 (use awful)) (chicken-5 (import awful))) (define-page (main-page-path) (lambda () (ajax "foo" 'foo 'click (lambda () '((a . 1) (b . 2) (c . 3))) update-targets: #t) `(,(link "#" "Click me" id: "foo") (div (@ (id "a"))) (div (@ (id "b"))) (div (@ (id "c"))))) use-ajax: #t)
(cond-expand (chicken-4 (use awful)) (chicken-5 (import awful))) (define-page (main-page-path) (lambda () (ajax "foo" 'foo "click" (lambda () "hey") success: "$('#bar').html(response + ' you!')") `(,(link "#" "Click me" id: "foo") (div (@ (id "bar"))))) use-ajax: #t)
The cache keyword parameter (boolean), if set to #f, it will force requested pages not to be cached by the browser. The default value is not set, leaving it to be set by jQuery. See jQuery's documentation for further details.
The ajax procedure is session, HTTP request and database -aware.