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    <p>The <code>h:messages</code> tag renders all messages for the current JSF view which are not covered by a <code>h:message</code> (remark the missing 's' at the end) tag. Messages can be generated explicitly by your backing beans (<code>FacesContext.addMessage</code>) or implicitly by JSF.</p> <p>E.g. if you have marked an input value as required and the user submits the form without filling in the required value, an error message will be added to the view. If a <code>h:message</code> tag is bound to the relevant component, the message will be rendered there, otherwise it will be rendered by the global <code>h:messages</code> tag in your view (if any).</p> <p>The <code>layout</code> attribute specifies what the HTML code to be generated should look like. The <code>table</code> layout (used in your example) uses an HTML table to display messages, while the <code>list</code> layout uses a bulleted list (HTML <code>ul</code> tag).</p> <p>If you do <em>not</em> specify a <code>h:messages</code> tag in your view and also no <code>h:message</code> tags, the user will not be informed about errors. Therefore, it is best practice to include a <code>h:message</code> tag for each input component of your view and a <code>h:messages</code> tag for your whole view to ensure that all messages are visible to the user.</p> <p>You will find a compact JSF tag reference at <a href="http://www.jsftoolbox.com/documentation/help/12-TagReference/index.jsf" rel="nofollow noreferrer">JSF Toolbox</a>.</p>
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    1. POWhat does <h:messages> do in JSF?
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    1. USJon Onstott
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    1. COConcerning "renders all messages for the current JSF view which are not covered". I don't think that is completely correct. It will show all messages except when you specify globalOnly="true".
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      1. USBruno Ranschaert
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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