Give each table a new id using zpt

Question

I'm using the tal:repeat statement to generate tables inside another table. Sadly I do not know how to give each table an unique id when generated. How can I do this?

I'm trying to use:

tal:attributes="id myindex" 

and

tal:attributes="id string:${myindex}"

But I can't get it to work.

Example:

<table id="tableIngrepen" class="table">
<thead class="header">
<tr>
    <th>Header1</th>
    <th tal:repeat="procedur_headers Procedur_Headers" tal:content="procedur_headers" > </th>
</tr>
</thead>
<tr tal:repeat="diagnoses Diagnoses"> 
    <div tal:define="myindex python:repeat['diagnoses'].index">
        <td ><input type='text' id="dz_code" readonly></input></td> <!-- onfocus="rijencolom($(this).parent().children().index($(this)),$(this).parent().parent().children().index($(this).parent()))" -->
        <td colspan="5">
            <table tal:attributes="id myindex"  class="table table-hover" style="border-style:none">
                <thead class="header">
                    <tr>
                        <th tal:repeat="procedur_headers Procedur_Headers" tal:content="procedur_headers" style="display:none"> </th> <!-- style="display:none"-->
                    </tr>
                </thead>
                <tr tal:repeat="list_procedur List_Procedur[myindex]">
                    <td><input type='text' ></input></td>
                    </tr>
                <tr>
                    <td><input type='text' ></input></td>
                    <td ><input type='text'></input></td>
                    <td><input type='text' ></input></td>
                    <td><input type='text' ></input></td>
                </tr>
            </table>
        </td>
    </div>
</tr>

Answer 1

You can use the TAL repeat variable that each repeat loop creates:

<table tal:attributes="id string:table-${python:repeat['diagnoses'].index}" 
       class="table table-hover" style="border-style:none">

or using a path expression:

<table tal:attributes="id string:table-${path:repeat/diagnoses/index}" 
       class="table table-hover" style="border-style:none">

Depending on how Chameleon was configured you can omit either the path: or the python: prefix; whichever one is the default expression type. Pagetemplates default to path: expressions, Chameleon to python: but normally the Plone integration switches that to path: to keep compatibility.

The repeat mapping contains a special object for each loop variable; your loop uses the name myindex so there is a repeat['diagnoses'] object that contains things like the loop index, the parity of the iteration (odd or even) and even roman numeral versions of the loop counter.

Answer 2

If Chameleon ZPT doesn't like the string syntax, you could go with the python expression syntax:

<table tal:attributes="id python:'table-' + repeat['diagnoses'].number" 
       class="table table-hover" style="border-style:none">

Or if you want it to be zero-based:

<table tal:attributes="id python:'table-' + repeat['diagnoses'].index" 
       class="table table-hover" style="border-style:none">