Flask Template for loop issue

Question

I am having running into an issue using flask framework to generate some html pages using a template (this is my first using Flask or any framework for that matter)

I am calling the template using the usual render_template call

return render_template("index.html", rec_list = rs_rec_list, type_list = rs_type_list)

rs_rec_list and rs_type_list being in the standard python list format

My template then has the following section of code:

<div class = "new_record_column">
    <div class="leftcolumn">
        <div class="new_record_header">
            ADD NEW RECORD
        </div>
        <div class="new_record_container">
             <label for "refnum">Ref No. </label>&nbsp
             <input type="text" id="refnum" size="30"> &nbsp &nbsp
             <select id="rec_type">
                    {% for type_item in type_list %}
                        <option value = loop.index> {{type_item}} </option>
                     {% endfor %}
             </select> &nbsp &nbsp
             <button>GO</button>
        </div>
    </div>
</div>
<table>
     <tr>
        <th>Reference No.</th>
        <th>Header 1</th>
        <th>Header 2</th>
        <th>Type</th>
        <th>Operator</th>
        <th>Comments</th>
        <th>Date/time</th>
     </tr>
     <tr>
      {% for rec_item in rec_list %}
        <td> {{rec_item}} </td>
     {% endfor %}
     </tr>
</table>

The issue I am having is that the first for loop that populates the select list works as it should, but the second for loop that populates the columns in the table, doesn't seem to do anything. I am pretty sure this is obvious, but I have probably been staring at it too long now to see it :)

bjernie · Accepted Answer · 2020-07-10 17:18:31Z

1

Have you checked if rec_list is empty?

answered Jul 10, 2020 at 17:18

bjernie

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2 Comments

Dman Over a year ago

Funny you should mention it, I was just running some checks, and when I put rec_list in place of type_list it was failing also.

Dman Over a year ago

SO now for the stupid part, it turns out I was editing the wrong file to feed rec_list into the template lol. I am testing a Flask to run the server and also wsgiref. I was editing the wsgiref file, but had Flask running....doh! Needless to say everything is running fine now.

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