how can i increment a variable with an “if” in a django template?









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I'm trying to increment a variable with "if" in the Django template, I've already tried all the suggestions on this site, but none have solved my problem.
there is views.py



class IndexView(generic.ListView):
template_name = 'home/index.html'
context_object_name = 'problemes'

def get_context_data(self, **kwargs):
context_data = super().get_context_data(**kwargs)
context_data['problemes'] = Probleme.objects.all()
context_data['commentaires'] = Commentaire.objects.all()
return context_data


def get_queryset(self):
result_list = self.get_context_data
return result_list


and index.html



....
% for problem in problemes %
% with number_comment= 0%
% for comment in commentaires %
% if comment.probleme.id == problem.id %
% number_comment ++ %
% endif %
% endfor %

<tr data-status="pagado">
<td>
<div class="votes">
<div class="mini-counts"><span title="74 votes">74</span></div>
<div>votes</div>
</div>


</td>
<td>
<div class="status answered-accepted" title="one of the answers was accepted as the correct answer">
<div class="mini-counts"><span title="2 answers"> number_comment </span></div>
<div>answers</div>
</div>
% endwith %
....









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    up vote
    0
    down vote

    favorite












    I'm trying to increment a variable with "if" in the Django template, I've already tried all the suggestions on this site, but none have solved my problem.
    there is views.py



    class IndexView(generic.ListView):
    template_name = 'home/index.html'
    context_object_name = 'problemes'

    def get_context_data(self, **kwargs):
    context_data = super().get_context_data(**kwargs)
    context_data['problemes'] = Probleme.objects.all()
    context_data['commentaires'] = Commentaire.objects.all()
    return context_data


    def get_queryset(self):
    result_list = self.get_context_data
    return result_list


    and index.html



    ....
    % for problem in problemes %
    % with number_comment= 0%
    % for comment in commentaires %
    % if comment.probleme.id == problem.id %
    % number_comment ++ %
    % endif %
    % endfor %

    <tr data-status="pagado">
    <td>
    <div class="votes">
    <div class="mini-counts"><span title="74 votes">74</span></div>
    <div>votes</div>
    </div>


    </td>
    <td>
    <div class="status answered-accepted" title="one of the answers was accepted as the correct answer">
    <div class="mini-counts"><span title="2 answers"> number_comment </span></div>
    <div>answers</div>
    </div>
    % endwith %
    ....









    share|improve this question























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm trying to increment a variable with "if" in the Django template, I've already tried all the suggestions on this site, but none have solved my problem.
      there is views.py



      class IndexView(generic.ListView):
      template_name = 'home/index.html'
      context_object_name = 'problemes'

      def get_context_data(self, **kwargs):
      context_data = super().get_context_data(**kwargs)
      context_data['problemes'] = Probleme.objects.all()
      context_data['commentaires'] = Commentaire.objects.all()
      return context_data


      def get_queryset(self):
      result_list = self.get_context_data
      return result_list


      and index.html



      ....
      % for problem in problemes %
      % with number_comment= 0%
      % for comment in commentaires %
      % if comment.probleme.id == problem.id %
      % number_comment ++ %
      % endif %
      % endfor %

      <tr data-status="pagado">
      <td>
      <div class="votes">
      <div class="mini-counts"><span title="74 votes">74</span></div>
      <div>votes</div>
      </div>


      </td>
      <td>
      <div class="status answered-accepted" title="one of the answers was accepted as the correct answer">
      <div class="mini-counts"><span title="2 answers"> number_comment </span></div>
      <div>answers</div>
      </div>
      % endwith %
      ....









      share|improve this question













      I'm trying to increment a variable with "if" in the Django template, I've already tried all the suggestions on this site, but none have solved my problem.
      there is views.py



      class IndexView(generic.ListView):
      template_name = 'home/index.html'
      context_object_name = 'problemes'

      def get_context_data(self, **kwargs):
      context_data = super().get_context_data(**kwargs)
      context_data['problemes'] = Probleme.objects.all()
      context_data['commentaires'] = Commentaire.objects.all()
      return context_data


      def get_queryset(self):
      result_list = self.get_context_data
      return result_list


      and index.html



      ....
      % for problem in problemes %
      % with number_comment= 0%
      % for comment in commentaires %
      % if comment.probleme.id == problem.id %
      % number_comment ++ %
      % endif %
      % endfor %

      <tr data-status="pagado">
      <td>
      <div class="votes">
      <div class="mini-counts"><span title="74 votes">74</span></div>
      <div>votes</div>
      </div>


      </td>
      <td>
      <div class="status answered-accepted" title="one of the answers was accepted as the correct answer">
      <div class="mini-counts"><span title="2 answers"> number_comment </span></div>
      <div>answers</div>
      </div>
      % endwith %
      ....






      django django-models django-forms






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      asked Nov 11 at 1:35









      Hafid

      52




      52






















          1 Answer
          1






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          oldest

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          up vote
          0
          down vote



          accepted










          If you can reference your number_comment directly as you have it in your index.html, you can use an add template tag to increment it. Of course this increments number only in template and doesn't save to the database.



           number_comment





          share|improve this answer




















          • thanks, i already tried this line but it doesn't work :/
            – Hafid
            Nov 11 at 9:28










          • Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
            – Uroš Trstenjak
            Nov 11 at 10:01










          • no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
            – Hafid
            Nov 11 at 10:13










          • any help, please!
            – Hafid
            Nov 11 at 10:19










          • But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
            – Uroš Trstenjak
            Nov 11 at 10:27











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          0
          down vote



          accepted










          If you can reference your number_comment directly as you have it in your index.html, you can use an add template tag to increment it. Of course this increments number only in template and doesn't save to the database.



           number_comment





          share|improve this answer




















          • thanks, i already tried this line but it doesn't work :/
            – Hafid
            Nov 11 at 9:28










          • Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
            – Uroš Trstenjak
            Nov 11 at 10:01










          • no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
            – Hafid
            Nov 11 at 10:13










          • any help, please!
            – Hafid
            Nov 11 at 10:19










          • But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
            – Uroš Trstenjak
            Nov 11 at 10:27















          up vote
          0
          down vote



          accepted










          If you can reference your number_comment directly as you have it in your index.html, you can use an add template tag to increment it. Of course this increments number only in template and doesn't save to the database.



           number_comment





          share|improve this answer




















          • thanks, i already tried this line but it doesn't work :/
            – Hafid
            Nov 11 at 9:28










          • Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
            – Uroš Trstenjak
            Nov 11 at 10:01










          • no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
            – Hafid
            Nov 11 at 10:13










          • any help, please!
            – Hafid
            Nov 11 at 10:19










          • But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
            – Uroš Trstenjak
            Nov 11 at 10:27













          up vote
          0
          down vote



          accepted







          up vote
          0
          down vote



          accepted






          If you can reference your number_comment directly as you have it in your index.html, you can use an add template tag to increment it. Of course this increments number only in template and doesn't save to the database.



           number_comment





          share|improve this answer












          If you can reference your number_comment directly as you have it in your index.html, you can use an add template tag to increment it. Of course this increments number only in template and doesn't save to the database.



           number_comment






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 11 at 1:49









          Uroš Trstenjak

          553413




          553413











          • thanks, i already tried this line but it doesn't work :/
            – Hafid
            Nov 11 at 9:28










          • Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
            – Uroš Trstenjak
            Nov 11 at 10:01










          • no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
            – Hafid
            Nov 11 at 10:13










          • any help, please!
            – Hafid
            Nov 11 at 10:19










          • But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
            – Uroš Trstenjak
            Nov 11 at 10:27

















          • thanks, i already tried this line but it doesn't work :/
            – Hafid
            Nov 11 at 9:28










          • Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
            – Uroš Trstenjak
            Nov 11 at 10:01










          • no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
            – Hafid
            Nov 11 at 10:13










          • any help, please!
            – Hafid
            Nov 11 at 10:19










          • But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
            – Uroš Trstenjak
            Nov 11 at 10:27
















          thanks, i already tried this line but it doesn't work :/
          – Hafid
          Nov 11 at 9:28




          thanks, i already tried this line but it doesn't work :/
          – Hafid
          Nov 11 at 9:28












          Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
          – Uroš Trstenjak
          Nov 11 at 10:01




          Where do you get this number_comment from? Is a field of your Commentaire model? In this case you should access it with commment.number_comment.
          – Uroš Trstenjak
          Nov 11 at 10:01












          no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
          – Hafid
          Nov 11 at 10:13




          no, is not a field of commentaire, it's a variable that I want to increment when I explore a list of items with a condition if something ... (with template)
          – Hafid
          Nov 11 at 10:13












          any help, please!
          – Hafid
          Nov 11 at 10:19




          any help, please!
          – Hafid
          Nov 11 at 10:19












          But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
          – Uroš Trstenjak
          Nov 11 at 10:27





          But you should pass this variable to the template from the view. You can't instantiate variables within the template. You could of course do it with a JavaScript, but that is something completely different. You can for example instantiate the variable in you view like that context_data['number_comment'] = 0. And than my answer would work.
          – Uroš Trstenjak
          Nov 11 at 10:27


















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