Parsing JSON with key-value-value (django/python)

Question

I am making an RSVP form where the invitee can opt to bring a guest (or 2 or 3). The form has inputs generated x number of times, where x is the # of guests the user sets. So for example, if the user chooses "0" from the dropdown, they're not bringing a guest so the form only has inputs for 1 person (themselves). If they select "1" from the dropdown, the form duplicates all the fields, but there is still just one route/one submit button. The duplicated form fields are identical to the original, so the form has 2 inputs named "name", 2 inputs named "dinner", etc.

I get a dictionary when I print request.POST:

<QueryDict: {u'restrictions': [u'None', u'Gluten'], u'name': [u'Krista', u'Joel'], u'dinner': [u'chicken', u'fish'], u'csrfmiddlewaretoken': [u'iEjxo6KgLGHZWwvaxEd6I7CUd7GTs89VGpiKwmiCP9xqXKFK096s0vboK4pPQxea']}>

In vanilla python I can access the values like so:

dictionary['restrictions'][1]

which returns "Gluten". But in Django this expression returns 'e' - the letter at index 1 of the key name 'restrictions'. Likewise,

for key, val1, val2 
   print key, val1, val2

returns "too many values to unpack", presumably because it's unpacking the letters in the key name instead of the values.

How can I access the values? Alternatively, is there a better way to generate multiple forms based on the user's selection, with just one route and one submit button?

What's the output of request.POST['restrictions']? It should be a list, but it looks like it's a string for some reason. How are you accessing the dictionary, request.POST['restrictions'][1]? — J. McBride
– J. McBride, Commented Mar 21, 2017 at 22:02
@J.McBride the output of request.POST['restrictions'] is "Gluten", and request.POST['name'] is "Joel". So it's only returning the most recent value for each key. Yes, request.POST['restrictions'][0] returns 'r' and [1] returns 'e' - so it's returning the letter at those indexes for the word ['restrictions'] — Krista P
– Krista P, Commented Mar 21, 2017 at 22:20

Xiao · Accepted Answer · 2017-03-21 22:19:05Z

2

You should try request.POST.getlist('restrictions')

answered Mar 21, 2017 at 22:19

Xiao

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