On Wed, Aug 5, 2009 at 10:03 AM, tom<toab...@googlemail.com> wrote:
>
> Hi folks,
>
> i want to build a searchform (with GET parameters) and also want to
> use pagination. But i can't find an easy solution for this common
> case.
> My solution has a searchform, a view and a template. Can anybody tell
> me if this is a good solution? I'm not sure because i find it very
> complicated for such an common case. maybe there's a much faster
> (easier) way to handle this.
>
>
> forms.py
>
> class ProjectDataSearchForm(forms.Form):
> """
> A Search form for the Project Data
> """
> dtf = forms.DateTimeField(label='Datetime from', required=False)
> dtt = forms.DateTimeField(label='Datetime to', required=False)
> d_u = forms.BooleanField(label='Data with status unknown',
> required=False)
> d_g = forms.BooleanField(label='Data with status good',
> required=False)
> d_w = forms.BooleanField(label='Data with status warning',
> required=False)
> d_e = forms.BooleanField(label='Data with status error',
> required=False)
>
> views.py
>
> def project_data_list(request, project_id):
> """
> Show a List with all Measurement Data from the Project
> """
> #Get Project. Needed by template
> project = get_object_or_404(Project, pk=project_id,
> auth_group__in=request.user.groups.all())
> #Use none-query
> query = Measurand.objects.none()
> newurl = ''
> if len(request.GET) > 0:
> form = ProjectDataSearchForm(data=request.GET)
> if form.is_valid():
> #Standard query
> query = Measurand.objects.filter
> (entry__project=project_id,
> entry__project__auth_group__in=request.user.groups.all())
> searchdict = form.cleaned_data
> qdict = {
> 'dtf':'entry__datetime__gte',
> 'dtt':'entry__datetime__lte',
> }
> q_objs = [Q(**{qdict[k]: searchdict[k]}) for k in
> qdict.keys() if searchdict.get(k, None)]
> query = query.filter(*q_objs)
> #get data status
> status = []
> if searchdict['d_u']:
> status.append('U')
> if searchdict['d_g']:
> status.append('G')
> if searchdict['d_w']:
> status.append('W')
> if searchdict['d_e']:
> status.append('E')
> query = query.filter(status__in=status)
>
> rawurl = urlencode(form.data)
> if len(rawurl):
> newurl = '&' + rawurl
>
> query = query.order_by('-entry__datetime')
>
> else:
> form = ProjectDataSearchForm(initial={'d_u':True, 'd_g':True,
> 'd_w':True, 'd_e':True})
>
> response = list_detail.object_list(
> request,
> queryset = query,
> template_name = 'project_data_list.html',
> template_object_name = 'measurand',
> paginate_by = 25,
> page = int(request.GET.get('page', '1')),
> extra_context = {'project':project, 'form':form,
> 'newurl':newurl}
> )
>
> return response
>
> template.html
>
>
> {% extends 'base.html' %}
> {% load i18n %}
>
> {% block content %}
>
> <h1>{% trans "Browse Measurands" %} ({% trans "Project:" %}
> {{project.name}})</h1>
> <span class="searchform">
> <form action="." method="GET">
> <table>
> {{ form.as_table }}
> </table>
> <input type="submit" value="{% trans "Search" %}">
> </form>
> </span>
>
> {% if is_paginated %}
> <div class="pagination">
> <span class="step-links">
> Select page: {% for p in page_range %} <a
> href=?page={{p}}
> {{newurl}}>{{p}}</a> {% endfor %}
> </span>
> </div>
> {% endif %}
>
> ........here is more stuff to print the data ................
>
> {% endblock content %}
>
>
>
>
>
>
>
>
> >
>
I'd like to reccomend you take a look at a reusable application I
wrote named Django filter:
http://github.com/alex/django-filter/tree/master . It tries to
automate building these forms, and it's interface should make it easy
enough to paginate.
Alex
--
"I disapprove of what you say, but I will defend to the death your
right to say it." -- Voltaire
"The people's good is the highest law." -- Cicero
"Code can always be simpler than you think, but never as simple as you
want" -- Me
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