Check if an array is not empty in Jinja2

Question

I need to check if the variable texts is defined or not in index.html.

If the variable is defined and not empty then I should render the loop.

Answer 1

Take a look at the documentation of Jinja2 defined(): http://jinja.pocoo.org/docs/templates/#defined

{% if variable is defined %}
    value of variable: {{ variable }}
{% else %}
    variable is not defined
{% endif %}

Is it clear enough? In your case it could look like this:

{% if texts is defined %}
    {% for text in texts %} 
        
{{ error }}
        

            
{{ text.subject }}
            
{{ text.content }}
        
    {% endfor %}
{% else %}
    Error!
{% endif %}