Data Lists

A web application can have one or more static data lists that it has to display and control. For example, the list of states, a list of genders, a list of accepted payment methods, etc. With Mentawai you can define localized and non-localized static lists in the database to load and display easily in the web application.

Non-localized data list:

mysql> select * from genders;
+----+--------+
| id | value  |
+----+--------+
|  1 | Man    |
|  2 | Woman  |
+----+--------+

Localized data list:

mysql> select * from genders;
+----+--------+---------------+
| id | locale | value         |
+----+--------+---------------+
|  1 | en_US  | Man           |
|  2 | en_US  | Woman         |
|  1 | pt_BR  | Homem         |
|  2 | pt_BR  | Mulher        |
+----+--------+---------------+

Loading in the application manager:

    @Override
    public void loadLists() {
		addLocalizedLists("groups", "languages"); // localized

		// OR

		addLists("groups", "languages"); // non-localized
	}

Displaying as a combo box inside a HTML form:

<!-- basics -->
<mtw:select name="groupId" list="groups" />

<!-- show an empty item with value=0 -->
<mtw:select name="groupId" list="groups" emptyField="true" />

Displaying its value:

<mtw:out value="user.groupId" list="groups" />




NOTE: The values displayed will be in the correct language if the list is localized. No need to worry or do anything.

Validating:

In the action:

val.requiredLists("required_field", "groupId", "languageId");

In the JSP:

						<mtw:outError field="groupId">
							<font color="red">
								<b><mtw:out /></b>
							</font>
						</mtw:outError>