Assign variable value to a form field in a template

Question

I wish to assign a value from variable word in my view function one_label to the form field label in my template. I've seen some solutions with javascript but I'm not sure how to use them with the form field in the template?

<script type="text/javascript"> 
   var myVar = "{{someDjangoVariable}}"
</script>

in models

class Labels(models.Model):
   label = models.CharField()

in forms

class LabelForm(forms.Form):

 label = forms.CharField(required = False)

in views

def one_label(request, postID):
   one_label = Labels.objects.get(id=postID
   if request.method =='POST':
      form = LabelForm(request.POST)
      if form.is_valid():


         word = "something"
      else:
        form = LabelForm()
      c = {"form"=form, "one_label"=one_label, "word"=word  }
      c.update(csrf(request))
      render(response,'mytemplate.html', c)

in template

 <form action="" method="post">{% csrf_token %}

      {{ form.as_p}}

  # assign value in var "word" in views to form field "label"

 # something like    {{ form.label}}:{{ word}}

 </form>

Is {{ word }} something that comes from the views context or something else? — Wtower
– Wtower, Commented May 19, 2015 at 12:41
its value comes from a separate python function that's called in the view function one_label — user1749431
– user1749431, Commented May 19, 2015 at 12:42

Wtower · Accepted Answer · 2015-05-19 12:55:06Z

2

First, there is a syntax error in your views.py, at least, or this is a syntax totally unknown to me. Context is a Python dictionary that could be declared as:

c = {'form': form, 'one_label': one_label, 'word': word}

I would strongly recommend you to get a grip on a good IDE, it will very much help you with syntax.

Regarding the form rendering, I would then recommend you to expand the form field rendering by replacing {{ form }} with something like:

{{ form.non_field_errors }}
<div class="fieldWrapper">
    {{ form.label.errors }}
    <label for="{{ form.label.id_for_label }}">{{ word }}</label>
    {{ form.label }}
</div>

See also Django documentation: Rendering fields manually

About assigning a value within a template, you could use the {% with %} tag although it seems kind of irrelevant to me for your particular problem.

answered May 19, 2015 at 12:55

Wtower

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