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I am facing an issue in Iterating for loop over multiple lists in flask jinja2 template.
My code is something looks like below
Type = 'RS'
IDs = ['1001','1002']
msgs = ['Success','Success']
rcs = ['0','1']
return render_template('form_result.html',type=type,IDs=IDs,msgs=msgs,rcs=rcs)
I am not sure of coming up with correct template so far,
<html>
<head>
<title>Response</title>
</head>
<body>
<h1>Type - {{Type}}!</h1>
{% for reqID,msg,rc in reqIDs,msgs,rcs %}
<h1>ID - {{ID}}</h1>
{% if rc %}
<h1>Status - {{msg}}!</h1>
{% else %}
<h1> Failed </h1>
{% endif %}
{% endfor %}
</body>
</html>
Output I am trying to get is something like below in html page
Type - RS
ID - 1001
Status - Failed
ID - 1002
Status - Success
578
Flask comes packaged with Jinja2, and hence we just need to install Flask. For this series, I recommend using the development version of Flask, which includes much more stable command line support among many other features and improvements to Flask in general.
you need zip() but it isn't defined in jinja2 templates.
one solution is zipping it before render_template function is called, like:
view function:
return render_template('form_result.html',type=type,reqIDs_msgs_rcs=zip(IDs,msgs,rcs))
template:
{% for reqID,msg,rc in reqIDs_msgs_rcs %}
<h1>ID - {{ID}}</h1>
{% if rc %}
<h1>Status - {{msg}}!</h1>
{% else %}
<h1> Failed </h1>
{% endif %}
{% endfor %}
also, you can add zip to jinja2 template global, using Flask.add_template_x functions(or Flask.template_x decorators)
@app.template_global(name='zip')
def _zip(*args, **kwargs): #to not overwrite builtin zip in globals
return __builtins__.zip(*args, **kwargs)
You can also pass in zip as a template variable if you are going to use it just once and prefer not to pollute global namespace.
return render_template('form_result.html', ..., zip=zip)
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