[Koha-bugs] [Bug 6209] Standardize on one javascript library for client-side form validation

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=6209

--- Comment #3 from Owen Leonard <oleonard at myacpl.org> ---
Created attachment 8474
  -->
http://bugs.koha-community.org/bugzilla3/attachment.cgi?id=8474&action=edit
Bug 6209 - Standardize on one plugin for client-side form validation

This patch adds the jQuery "Validation" plugin
(http://docs.jquery.com/Plugins/Validation) and includes it by
default in the staff client, adding one default configuration:
A translatable string to be used for a default "required" message.

For a simple example I have modified the library entry form
to mark required fields as required (something which had not
been done before). Each required field has been given a class,
"required" and the HTML5 attribute "required." The former adds
the hook for the plugin, the latter adds browser-based validation
in recent browsers (and which will be superceded by the plugin
if JavaScript is enabled).

In the template the form which should be validated is initialized
like so:

$("#FormID").validate();

This will check for inputs classed "required" without any
additional configuration. More complex forms (with specific
data types, for instance) will require more inline JavaScript
configuration.

To test, go to Administration -> Libraries and Groups and choose
"New library." Submit the form without entering a library code
or name. You should be prevented from submitting the form and be
shown an error message by each field.

To test browser-based validation, disable JavaScript and follow
the same procedure.

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