Lesson 6. Recent Elvis Sightings, cont.

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So we've seen that the sightings page is built from objects in the sightingsFolder folder. How does it work?
  1. Click the sightings document to edit it.

  2. Change the contents of the document to:

    <dtml-var standard_html_header>
    <h2><dtml-var title></h2>
    <table border="1">
    <dtml-in expr="sightingsFolder.objectValues()">
      <dtml-var sequence-item>
    <dtml-var standard_html_footer>

  3. Click the Save Changes button.

  4. Click the View tab.

Notice how each sighting now has a box drawn around it.

What's going on? The <dtml-in> tag iterates over a list of objects. The <dtml-var sequence-item> tag inserts the current object. The expr="sightingsFolder.objectValues()" part of the <dtml-in> tags tells it how to get a list of objects. It calls the objectValues method of the sightingsFolder folder. objectValues returns all the objects contained by a folder.


You can programmatically build web pages with groups of objects by looping over them and inserting them.

In the next lesson you'll learn about how to manage and display pictures.

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