count number of rows in flask templates

count, flask, loops, python, templates

Solution

Inside the loop you can access a special variable called `loop` and you can see the number of items with `{{ loop.length }}`

This is all you can do with loop auxiliary variable:

loop.index The current iteration of the loop. (1 indexed)

loop.index0 The current iteration of the loop. (0 indexed)

loop.revindex The number of iterations from the end of the loop (1 indexed)

loop.revindex0 The number of iterations from the end of the loop (0 indexed)

loop.first True if first iteration.

loop.last True if last iteration.

loop.length The number of items in the sequence.

loop.cycle A helper function to cycle between a list of sequences. See the explanation below.

loop.depth Indicates how deep in deep in a recursive loop the rendering currently is. Starts at level 1

loop.depth0 Indicates how deep in deep in a recursive loop the rendering currently is. Starts at level 0

EDIT:

To see the count of items outside de for loop you can generate another variable from your view like `count_data = len(data)` or you can use the `length` filter:

Data count is {{ data|length }}:
{% for i in data %}
    <tr>
      <td>{{i.id}}</td>
      <td>{{i.first_name}}</td>
      <td>{{i.last_name}}</td>
      <td>{{i.email}}</td>
    </tr>
{% endfor %}

Problem

Original source