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pythontemplatesloopscountflask
Rohit Goel
Rohit Goel

Reputation: 3554

count number of rows in flask templates

i have send a variable from my views to templates which consist of the data from database

this is what i am using in my template

{% 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 %}

there are seven entries in this loop , i need to show count lease suggest how can i do this

Upvotes: 19

Views: 24862

Answers (2)

Rohit Goel
Rohit Goel

Reputation: 3554

{{ data|length }}

this works perfect we not need to use this in loop just use any where in the template even we dont need to send another variable from views

Upvotes: 3

Diego Navarro
Diego Navarro

Reputation: 9704

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 %}

Upvotes: 50

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