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>

Martijn Pieters · Accepted Answer · 2013-05-10T17:13:42.107

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.

edited May 10 '13 at 17:13

answered May 10 '13 at 15:27

Martijn Pieters

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Is the syntax ok? It's not `table-${repeat/myindex/index}`? – keul May 10 '13 at 16:03
@keul: Ah, yes. This is Chameleon used with *Plone*; default Chameleon uses Python expressions, but the Plone integration switches that to path expressions. – Martijn Pieters May 10 '13 at 16:04
So I guess I was on the right track after all, thanks for the explenation, this was more than I could have hoped for. Yet I think I'm using the default chameleon zpt because when I use the code u provided I get the following error: TypeError: unsupported operand type(s) for /: 'RepeatDict' and 'callableint' ==> Expression: "string:table-${repeat/myindex/index}". – GertV May 10 '13 at 16:17
@GertV: Rolled back to the previous version, does this one work for you? :-) – Martijn Pieters May 10 '13 at 16:19
@GertV: Do you see *any* `id` attribute being generated at all? Do you get an error message instead? If so, what is the error? – Martijn Pieters May 10 '13 at 17:05
tal:attributes="id string:table-${python:repeat['myindex'].index}" and tal:attributes="id string:table-${repeat['myindex'].index}" give me : builtins.KeyError KeyError: 'myindex' ==> - Expression: "string:table-${python:repeat['myindex'].index}" I can paste the full traceback here if u want – GertV May 10 '13 at 17:08
@GertV: ah, you are not using a `tal:repeat` at all! You are using `tal:define`, nothing is being repeated. – Martijn Pieters May 10 '13 at 17:11
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/29747/discussion-between-gertv-and-martijn-pieters) – GertV May 10 '13 at 17:12
@GertV: found the solution? Yes, `id string:table-$myindex;` also works, because that is just a variable with the same value. – Martijn Pieters May 11 '13 at 15:35
yup found the solution, not proud of what I did because the eroor wasn't realy related to this just some stupid bug. But thanks alot for your help. – GertV May 11 '13 at 15:57

score 0 · Answer 2 · answered May 12 '13 at 13:11

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">

Give each table a new id using zpt

2 Answers2