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 %}
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