Using python dictionary in for loop

Question

I am developing a project using django. I am using python dictionary to display data in for loop. I have set a dynamic key as per my requirement in dictionary using following code.

abc = {}

for user in users
 abc[user] = "some dynamic data"

context = {
            'contributors ': abc
        }
return render(request, 'contacts.html', context)

I send above code to my template to display data for each user.

{% for contributor in contributors %}

    {% for contributor_mp in contributor %}
        {{  contributor_mp }}
    {% endfor %}


{% endfor %}

I could not even access my code in view as I got error when I tried to serialize my dictionary

error:'long' object has no attribute '_meta'

I was using below to display my abc dictionary :

json_data = serializers.serialize("json", abc,use_natural_foreign_keys=True)
return HttpResponse(json_data)

So I used json_data = serializers.serialize("json", abc[123],use_natural_foreign_keys=True) return HttpResponse(json_data)

and got something like below (a validated json):

[{
    "fields": {
        "status": 0,
        "description": "Fresh & Healthy",
        "name": "Fresh & Healthy",
        "public": false,
        "custom_type": null,
        "user": "mpowner",
        "image_url": 
        "course_type": 1,
        "type": 1
    },
    "model": "mealplan",
    "pk": 140
}, {
    "fields": {
        "status": 0,
        "description": "evening snacks",
        "name": "evening snacks",
        "public": false,
        "custom_type": "health and taste",
        "user": "mpowner",
        "image_url": 
        "course_type": 1,
        "type": 1
    },
    "model": "mealplan",
    "pk": 155
}]

Now my problem is when I send this to my template I get an

error:'long' object is not iterable

As this is my first project in python and I am basically a php developer I am feeling really uncomfortable facing these kind of errors.Please help solving this and suggest some other way to use something like array ( a multi dimensional one) in python.

Shang Wang · Accepted Answer · 2016-05-26 16:42:40Z

4

To iterate a dict in django template you need to use items:

{% for contributor, dynamic_data in contributors.items %}
    {{ user }} {{ dynamic_data }}
{% endfor %}

answered May 26, 2016 at 16:42

Shang Wang

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